Signal transmission method and apparatus, storage medium, and program product

Abstract

The embodiments of the present disclosure provide a signal transmission method and apparatus, a storage medium, and a program product. The method comprises: sending a first signal, the first signal being used for indicating a number N of time domain resource indexes, N being greater than or equal to 1; and receiving a second signal sent by a second node corresponding to the N time domain resource indexes.

Description

Signal transmission method and device, storage medium and program product

[0001] The present disclosure claims priority to Chinese Patent Application No. 202410877827.4, filed on July 01, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of communication, and in particular to a signal transmission method and device, a storage medium and a program product. BACKGROUND

[0003] In a random access process of a passive Internet of Things, a base station or a network node needs to send a trigger command to realize access of a terminal. SUMMARY

[0004] In one aspect, a signal transmission method is provided, comprising: sending a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; and receiving a second signal sent by a second node corresponding to the N time domain resource indexes.

[0005] In another aspect, a signal transmission method is provided, comprising: receiving a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; and sending a second signal in a case where a second node belongs to the second node corresponding to the N time domain resource indexes.

[0006] In still another aspect, a signal transmission device is provided, comprising: a sending unit and a receiving unit; the sending unit is configured to send a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; and the receiving unit is configured to receive a second signal sent by a second node corresponding to the N time domain resource indexes.

[0007] In another aspect, a signal transmission device is provided, comprising: a receiving unit and a sending unit; the receiving unit is configured to receive a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; and the sending unit is configured to send a second signal in a case where a second node belongs to the second node corresponding to the N time domain resource indexes.

[0008] In still another aspect, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is configured to store a computer program; and the processor is configured to implement the signal transmission method of any one of the above aspects or embodiments when executing the computer program.

[0009] In still another aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores computer program instructions, the computer program instructions being executed by a processor to implement the signal transmission method of any one of the above aspects or embodiments.

[0010] In yet another aspect, a computer program product is provided, which includes computer program instructions, which, when executed by a processor, implement the signal transmission method according to any one of the above aspects or embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description are only some drawings of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0012] FIG. 1 is a system architecture diagram provided by some embodiments of the present disclosure.

[0013] FIG. 2 is a flow diagram of a signal transmission method provided by some embodiments of the present disclosure.

[0014] FIG. 3 is a flow diagram of a four-step access procedure provided by some embodiments of the present disclosure.

[0015] FIG. 4 is a flow diagram of another signal transmission method provided by some embodiments of the present disclosure.

[0016] FIG. 5 is a flow diagram of transmitting a second signal provided by some embodiments of the present disclosure.

[0017] FIG. 6 is a flow diagram of another transmitting a second signal provided by some embodiments of the present disclosure.

[0018] FIG. 7 is a flow diagram of yet another transmitting a second signal provided by some embodiments of the present disclosure.

[0019] FIG. 8 is a flow diagram of selecting a time domain resource index provided by some embodiments of the present disclosure.

[0020] FIG. 9 is a structural diagram of a communication apparatus provided by some embodiments of the present disclosure.

[0021] FIG. 10 is a structural diagram of another communication apparatus provided by some embodiments of the present disclosure.

[0022] FIG. 11 is a structural diagram of yet another communication apparatus provided by some embodiments of the present disclosure. DETAILED DESCRIPTION

[0023] The technical solutions in the present disclosure will be described clearly and completely below in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

[0024] It should be noted that in the present disclosure, the words such as "exemplarily" or "for example" are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplarily" or "for example" in the present disclosure should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words such as "exemplarily" or "for example" are intended to present the relevant concept in an exemplary manner.

[0025] Hereinafter, the terms "first", "second", and the like are used only for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features.

[0026] In the description of the present disclosure, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this document is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean: only A, only B, and A and B. In addition, "at least one" means one or more, and "multiple" means two or more.

[0027] It can be understood that, without conflict, the functions, steps, etc. shown in the present disclosure can occur in an order different from that shown in the present disclosure, and there can be other functions, steps, etc. between any two adjacent functions, steps, etc. shown in the present disclosure.

[0028] In the communication of passive Internet of Things, a time division multiplexing (TDM) based anti-collision algorithm is usually used to realize the access or inventory process of the terminal, so as to avoid multiple terminals sending response signals at the same time, causing conflict between signals. In some anti-collision algorithms, each terminal device randomly selects a time domain resource (such as a time slot), the base station or network node sends a trigger command and triggers a time domain resource to start, and the terminal selecting the time domain resource sends a response signal.

[0029] However, in the case of a large number of terminals, the base station or network node needs to configure a large number of time domain resources, and send a trigger command for each time domain resource. The transmission of these trigger commands occupies a large time overhead and increases the power consumption of the base station. In addition, considering factors such as signal processing time, a certain time interval is reserved between adjacent signals. Therefore, the more the above trigger commands, the more the related time intervals, which further wastes time overhead, resulting in a reduction in access efficiency.

[0030] The embodiment of the present disclosure provides a signal transmission method. A first node sends a first signal used to indicate N time domain resource indexes, where N is greater than or equal to 1. Then, the first node can receive a second signal sent by a second node corresponding to the N time domain resource indexes. In this way, since one first signal can indicate multiple time domain resource indexes, the overhead of the signal used to indicate the time domain resource indexes can be saved, thereby improving the access efficiency and reducing the access latency.

[0031] The signal transmission method provided by the embodiment of the present disclosure can be applied to a communication system as shown in FIG. 1. As shown in FIG. 1, the communication system includes a first node 101 and a second node 102.

[0032] The first node 101 and the second node 102 are communicatively connected. The first node 101 can be a base station, a network node, a user equipment (UE), a card reader, or the like. The second node 102 can be a terminal, an internet of things (IoT) device, a passive IoT device, an Ambient IoT device, a tag, or the like. FIG. 1 takes the first node 101 as a base station and the second node 102 as a terminal as an example for illustration.

[0033] In the embodiment of the present disclosure, the first node 101 can send a first signal to the second node 102. The first signal indicates N time domain resource indexes. Therefore, the second node 101 corresponding to the N time domain resource indexes can send a second signal to the first node 101 after receiving the first signal. In this way, the first signal can indicate multiple time domain resource indexes at a time, thereby reducing the number of first signals sent and reducing the time overhead occupied by the signal used to indicate the time domain resource indexes, further improving the access efficiency.

[0034] It should be noted that FIG. 1 is only an exemplary framework diagram, and the number of devices included in FIG. 1 and the names of the devices are not limited. In addition to the devices shown in FIG. 1, the communication system can also include other devices, such as a relay node.

[0035] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and business scenarios described in the embodiments of the present disclosure are used to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0036] The signal transmission method provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0037] The signal transmission method provided by the embodiments of the present disclosure can be applied to the first node 101 in the communication system shown in FIG. 1. FIG. 2 shows a flowchart of a signal transmission method. As shown in FIG. 2, the signal transmission method includes the following S201 and S202.

[0038] S201, the first node transmits a first signal.

[0039] The first signal is used to indicate N time domain resource indexes, and N is greater than or equal to 1.

[0040] In some embodiments, the time lengths of the N time domain resources corresponding to the N time domain resource indexes can be equal or unequal.

[0041] It can be understood that one time domain resource index corresponds to one time domain resource, and the time domain resource can be a time slot (for example, a time slot in the slot-ALOHA or Q-selection algorithm), a time domain symbol, or other time units. In the case where the time domain resource is a time slot, the time domain resource index is a time slot count value.

[0042] In an implementation manner, the start time or end time of the time domain resource can be indicated by the first signal. For example, the first node indicates the end of the N time domain resources or the start of the N time domain resources each time the first signal is transmitted.

[0043] S202, the first node receives a second signal transmitted by a second node corresponding to the N time domain resource indexes.

[0044] The second node corresponding to the N time domain resource indexes includes a second node whose stored time domain resource index belongs to the N time domain resource indexes. In some embodiments, the time domain resource index stored by the second node can be a time domain resource index randomly selected by the second node, or a time domain resource index determined by the second node based on the randomly selected time domain resource index.

[0045] In the random access procedure, the first node sends an access instruction signal, the access instruction signal is used to determine a time domain resource index range, and the second node can randomly select a time domain resource index in the time domain resource index range. Then, the first node can send a first signal used to indicate (or determine) N time domain resource indexes. After receiving the first signal, the second node can determine whether it belongs to the second node corresponding to the N time domain resource indexes according to the stored time domain resource index.

[0046] The second node corresponding to the N time domain resource indexes can send a second signal. Correspondingly, the first node can receive the second signal sent by the second node, so that the second node can access the network through the second signal. In this way, one first signal can indicate multiple time domain resource indexes at the same time, and the second nodes corresponding to the multiple time domain resource indexes can be accessed, so that the number of first signals can be reduced, the time cost for access can be reduced, the access efficiency can be improved, the power consumption of the first node can be reduced, and the resource utilization rate can be improved.

[0047] In the embodiments of the present disclosure, there are multiple ways for the first signal to indicate N time domain resource indexes, for example:

[0048] In the first way, the first signal is used to indicate a first time domain resource index, the N time domain resource indexes include N continuous time domain resource indexes from a second time domain resource index to the first time domain resource index, and the second time domain resource index is the next time domain resource index of the time domain resource index indicated by the previous first signal. In some embodiments, the second nodes corresponding to the N time domain resource indexes include second nodes whose stored time domain resource indexes are in the continuous N time domain resource index range from the second time domain resource index to the first time domain resource index.

[0049] The first signal (the current latest first signal) indicates a first time domain resource index s. n is a time domain resource index indicated by the previous first signal, and the second time domain resource index is n+1. In this way, the N time domain resource indexes indicated by the first signal are n+1 to s, and N=s-n. The second nodes corresponding to the N time domain resource indexes are the second nodes whose stored time domain resource indexes are in the range from n+1 to s. In this way, the first signal can indicate N time domain resource indexes through only one time domain resource index, thereby saving signaling overhead.

[0050] It should be understood that when the first signal is the first first signal, the second time domain resource index is 1.

[0051] For example, the time domain resource index (value) indicated by the previous first signal is 16, i.e. n. The first node sends a first signal, which indicates the time domain resource index 20, i.e. the first time domain resource index. The second node can determine the N time domain resource indexes as 17 (n+1, i.e. the second time domain resource index) to 20 (s). If a second node selects a time domain resource index within the interval of 17 to 20, it sends a second signal.

[0052] In the second mode, the first signal is used to indicate the value of N, and the N time domain resource indexes include the continuous N time domain resource indexes starting from the second time domain resource index, which is the next time domain resource index of the last time domain resource index indicated by the previous first signal. In some embodiments, the second nodes corresponding to the N time domain resource indexes include the second nodes whose stored time domain resource indexes are within the continuous N time domain resource indexes starting from the second time domain resource index.

[0053] The first signal (the current latest first signal) is used to indicate the value of N. n is the last time domain resource index in the N time domain resource indexes indicated by the previous first signal, and the second time domain resource index is n+1. In this way, the N time domain resource indexes indicated by the first signal are the continuous N time domain resource indexes from n+1 to n+N. The second nodes corresponding to the N time domain resource indexes are the second nodes whose stored time domain resource indexes are within the range of n+1 to n+N. In this way, the first signal only needs to indicate the value of N, thereby saving the signaling overhead without indicating the N time domain resource indexes.

[0054] It should be understood that when the first signal is the first first signal, the second time domain resource index is 1.

[0055] For example, the last time domain resource index (value) in the N time domain resource indexes indicated by the previous first signal is 20, i.e. n. The first node sends a first signal, which indicates the value of N as 2. The second node can determine the N time domain resource indexes as 21 (n+1) and 22 (n+2). If a second node selects a time domain resource index as 21 or 22, it sends a second signal.

[0056] In the third mode, the first signal is used to indicate that the second node subtracts N from the stored time domain resource index, and the second nodes corresponding to the N time domain resource indexes are the second nodes whose stored time domain resource indexes belong to 1 to N or the difference value obtained by subtracting N from the stored time domain resource index is less than or equal to 0. In some embodiments, the second nodes corresponding to the N time domain resource indexes include the second nodes whose stored time domain resource indexes belong to 1 to N or the difference value obtained by subtracting N from the stored time domain resource index is less than or equal to 0.

[0057] The first signal is used to instruct the second node to subtract N from the stored time domain resource index. After receiving the first signal, if the stored time domain resource index of the second node is within 1 to N, the second node sends the second signal. Then, all the second nodes subtract N from the stored time domain resource index. In an implementation, after the second node sends the second signal, the stored time domain resource index can be reset to 0 or released.

[0058] Alternatively, after receiving the first signal, the second node subtracts N from the stored time domain resource index of itself to obtain a difference after subtraction, and if the difference is less than or equal to 0, the second node sends the second signal. It should be understood that in an implementation, the stored time domain resource index after subtraction is 0 at least.

[0059] In an implementation, after receiving the first signal, if the difference obtained by subtracting N from the stored time domain resource index of the second node is greater than 0, the stored time domain resource index is updated to the difference. That is, the second node subtracts N from the stored time domain resource index each time it receives the first signal, until the stored time domain resource index is 0, and the second node sends the second signal.

[0060] Exemplarily, the first signal indicates that the time domain resource index is subtracted by 4 (i.e., N), and then the second node with the stored time domain resource index less than or equal to 4 and greater than or equal to 1 sends the second signal. Then, all the second nodes subtract 4 from the stored time domain resource index. In this way, the second node with the stored time domain resource index greater than 4 can send the second signal based on the subsequent first signal.

[0061] The fourth mode, the first signal is used to instruct the second node to subtract the number of time domain resources in a time domain resource set from the stored time domain resource index, and the N time domain resource indexes are 1 to N.

[0062] In the case where a time domain resource set includes N time domain resources, after receiving the first signal, the second node determines whether the stored time domain resource index is within 1 to N, and if so, the second node sends the first signal. In addition, all the second nodes subtract N (i.e., the number of time domain resources in a time domain resource set) from the stored time domain resource index. It should be understood that the stored time domain resource index after subtraction is 0 at least.

[0063] Alternatively, the second node first subtracts N (i.e., the number of time domain resources in a time domain resource set) from the stored time domain resource index of itself to obtain a difference. Then, if the difference is within 1 to N, the second node sends the second signal. In this way, the first signal can indicate N time domain resource indexes without additional indication information, so that it is not necessary to directly indicate the N time domain resource indexes, thereby saving signaling overhead.

[0064] In some embodiments, the N time domain resource indexes correspond to the second nodes within the time domain resource set indicated by the stored time domain resource index.

[0065] Each time domain resource set includes N time domain resources. The next time domain resource set can be determined in an incremental manner or in a decremental manner. In this way, the first signal can indicate the N time domain resource indexes by indicating the increment (or decrement) only, without the need of indicating the N time domain resource indexes by additional indication information, thereby saving signaling overhead.

[0066] For example, the first signal is used to indicate that the time domain resource set is incremented by 1, and the current time domain resource set index (i.e. the index of the second time domain resource set) r is the time domain resource set index indicated by the previous first signal. The N time domain resource indexes are the indexes of the N time domain resources in the time domain resource set with index r+1 (i.e. the next time domain resource set), i.e. (r+1)*N to (r+2)*N-1. In this way, the second nodes with the stored time domain resource indexes within (r+1)*N to (r+2)*N-1 transmit the second signal.

[0067] Alternatively, the first signal is used to indicate that the time domain resource set is decremented by 1, and the current time domain resource set index (i.e. the index of the second time domain resource set) r is the time domain resource set index indicated by the previous first signal. The N time domain resource indexes are the indexes of the N time domain resources in the time domain resource set with index r-1 (i.e. the next time domain resource set), i.e. (r-1)*N to r*N-1. In this way, the second nodes with the stored time domain resource indexes within (r-1)*N to r*N-1 transmit the second signal.

[0068] It should be understood that when the first signal is the first first signal, the second time domain resource set index is 0.

[0069] In some embodiments, the N time domain resource indexes correspond to the second nodes within the time domain resource set indicated by the stored time domain resource index.

[0070] The first signal can indicate an index s of a time domain resource set (i.e., an index of the first time domain resource set), the time domain resource set including N time domain resources, the N time domain resource indexes being indexes of the N time domain resources in the time domain resource set s, i.e., s*N to (s+1)*N-1, and the stored time domain resource index being in the second node sending the second signal in s*N to (s+1)*N-1. In this way, the first signal can indicate the N time domain resource indexes only through the index of the time domain resource set, thereby saving signaling overhead.

[0071] The above is the description of the multiple ways of the first signal for indicating the N time domain resource indexes, and the following will describe other transmission processes in the random access process.

[0072] In some embodiments, before sending the first signal, the first node sends an access instruction signal, the access instruction signal being used to indicate the second node to randomly select a time domain resource index from a time domain resource index range indicated by the access instruction signal.

[0073] The first node can send the access instruction signal, the access instruction signal indicating a time domain resource index range, for example, 0 to S-1, S being greater than or equal to 1. The second node can randomly select a time domain resource index from the time domain resource index range after receiving the access instruction signal, and store the time domain resource index.

[0074] In some embodiments, in the two-step access process, the second signal can include a fixed identifier of the second node. In the four-step access process, the second signal includes a temporary identifier or a temporary identification code of the second node, for example, the temporary identifier including a random sequence with Y bits, for example, Y being equal to 16.

[0075] In some embodiments, the first node is a reader, which can be a base station, a user equipment (UE), a relay node, etc., and the second node is an ambient internet of things (Ambient IoT) device. The first signal, the third signal, and the access instruction signal are transmitted in a R2D (Reader to device) channel, the second signal and the fourth signal are transmitted in a D2R (Device to Reader) channel, and all the signals include a preamble sequence, which can be used for timing synchronization of the signals.

[0076] In yet some embodiments, FIG. 3 shows a flowchart of a four-step access process. In combination with FIG. 2, as shown in FIG. 3, after receiving the second signal sent by the second node, the method provided by the embodiments of the present disclosure further includes:

[0077] S301, the first node sends a third signal.

[0078] The third signal includes confirmation information of the Z second signals. Z is greater than or equal to 1.

[0079] In the four-step access process, the second signal includes a temporary identifier of the second node. Since the first signal can indicate multiple time domain resource indexes, the first node can receive multiple second signals. In the case where the second signal includes the temporary identifier of the second node, the first node can send the third signal including the confirmation information of the Z second signals after successfully decoding the Z second signals. For example, in the case where the second signal includes the temporary identifier of the second node, the confirmation information of the second signal can be the temporary identifier of the second node or information corresponding to the temporary identifier of the second node.

[0080] S302, the first node receives a fourth signal.

[0081] The fourth signal includes a fixed identifier of the second node. It should be understood that the fixed identifier can be a permanent identifier (ID) of the second node, such as an electronic product code, a unique identifier, etc.

[0082] In the two-step access process, the second signal can include the fixed identifier of the second node. In the four-step access process, the second signal includes a temporary identifier or a temporary identifier of the second node, for example, the temporary identifier includes a random sequence with Y bits, for example, Y is equal to 16.

[0083] After receiving the third signal, in the case where the second node includes the confirmation information of the second signal sent by itself in the confirmation information of the Z second signals, the second node sends the fourth signal to the first node to access the network.

[0084] In an implementation mode, in the case where Z is greater than 1, the transmission order of the confirmation information of the Z second signals is used to determine the transmission delay of the fourth signal. In the case where Z is greater than 1, the confirmation information of the Z second signals is sequentially transmitted in the third signal, so that the second node can determine the transmission order (or transmission sequence) of the confirmation information of the second signal sent by itself in the confirmation information of the Z second signals after receiving the third signal. Then, the second node can determine the transmission delay of the fourth signal of the second node based on the transmission order. In this way, since the transmission delays of the fourth signals sent by multiple second nodes are different, collision of the multiple fourth signals can be avoided, thereby improving the access success rate.

[0085] For example, the transmission delay value D i satisfies at least one of the following: D i= T1 + (i - 1)T EPC + a i T EPC ; D i = T1 + A j T EPC ;

[0086] 1 < i ≤ Z, T1 is the transmission delay of the first fourth signal, T1 is a predefined value or indicated by the second delay indication information; T EPC is the transmission duration of a fourth signal, t k is the interval between the fourth signals corresponding to the transmission orders k and k + 1, t k is a predefined value or determined according to T EPC The larger the k value, the larger the t k value. For example, t0 = 0.21×T D2R , t1 = 0.47×T D2R , t2 = 0.77×T D2R ; a j , A j are predefined delay coefficients, a j > 0, A j > 1. The larger the j value, the larger the a j or A j value. In some embodiments, the second delay indication information may be sent by the first node.

[0087] In some embodiments, among the second nodes corresponding to the Z acknowledgment messages, the second node determines the transmission sub - band according to the transmission order of the acknowledgment message of its own sent second signal among the Z acknowledgment messages, and sends the fourth signal on this transmission sub - band.

[0088] Among the second nodes corresponding to the Z acknowledgment messages, the second node determines the spreading code according to the transmission order of the acknowledgment message of its own sent second signal among the Z acknowledgment messages, and uses this spreading code to spread the data of the fourth signal, and then sends the fourth signal spread based on the spreading code.

[0089] In still other embodiments. The second node may determine the radio network temporary identity (RNTI) according to at least one of the second signal, the transmission opportunity, the transmission sub - band, and the spreading code. The radio network temporary identity may be used as the temporary identity of the second node or the acknowledgment information of the second signal.

[0090] The signal transmission method provided by the embodiments of the present disclosure can also be applied to the second node 102 in the communication system shown in FIG. 1. FIG. 4 shows a flowchart of a second signal transmission method. As shown in FIG. 4, the signal transmission method includes the following S401 and S402.

[0091] S401, the second node receives a first signal.

[0092] The first signal is used to indicate N time domain resource indexes, and N is greater than or equal to 1. In some embodiments, the time lengths of the N time domain resources corresponding to the N time domain resource indexes can be equal or unequal.

[0093] In the random access process, the second node receives an access instruction signal, determines a time domain resource index range according to the access instruction signal, and can randomly select a time domain resource index within the time domain resource index range. Then, the first node can send a first signal used to indicate N time domain resource indexes. After receiving the first signal, the second node can determine whether it belongs to the second node corresponding to the N time domain resource indexes according to the time domain resource index stored by itself. In an implementation, the time domain resource index stored by the second node can be the randomly selected time domain resource index. In another implementation, the time domain resource index stored by the second node can be a time domain resource index determined based on the randomly selected time domain resource index. Then, the stored time domain resource index is reduced by N every time the first signal is received, until the stored time domain resource index is less than or equal to 0.

[0094] It can be understood that one time domain resource index corresponds to one time domain resource, which can be a time slot (for example, a time slot in the slot-ALOHA or Q-selection algorithm), a time domain symbol, or other time units. In the case of a time slot, the time domain resource index is a time slot count value.

[0095] S402, in the case where the second node belongs to the second node corresponding to the N time domain resource indexes, a second signal is sent.

[0096] In an implementation, the first signal is used to indicate a first time domain resource index. The second node belongs to the second node corresponding to the N time domain resource indexes includes that the stored time domain resource index is within a continuous N time domain resource index range from a second time domain resource index to the first time domain resource index; and the second time domain resource index is a next time domain resource index of a time domain resource index indicated by a previous first signal.

[0097] In an implementation, the first signal is used to indicate the value of N. The second node belonging to the second node corresponding to the N time domain resource indexes comprises: the stored time domain resource index is in the range of the continuous N time domain resource indexes starting from the second time domain resource index; and the second time domain resource index is the next time domain resource index of the last time domain resource index indicated by the previous first signal.

[0098] In an implementation, the first signal is used to indicate that the second node subtracts N from the stored time domain resource index. The second node belonging to the second node corresponding to the N time domain resource indexes comprises: the difference obtained by subtracting N from the stored time domain resource index is less than or equal to 0, or the stored time domain resource index belongs to 1 to N. It should be understood that in an implementation, the stored time domain resource index is 0 after subtracting N.

[0099] In some embodiments, when the difference obtained by subtracting N from the stored time domain resource index is greater than 0, it is determined that the second node does not belong to the second node corresponding to the N time domain resource indexes, and the stored time domain resource index is updated as the difference. In this way, the second node subtracts N from the stored time domain resource index every time it receives the first signal, until the stored time domain resource index is 0, and then sends the second signal.

[0100] In an implementation, the first signal is used to indicate the next time domain resource set of the second time domain resource set, and the time domain resource set contains N time domain resources. The second node belonging to the second node corresponding to the N time domain resource indexes comprises: the stored time domain resource index is in the time domain resource set indicated by the first signal; and the second time domain resource set is the time domain resource set indicated by the previous first signal.

[0101] In an implementation, the first signal is used to indicate the index of the first time domain resource set, and the first time domain resource set comprises N time domain resource indexes. The second node belonging to the second node corresponding to the N time domain resource indexes comprises: the stored time domain resource index is in the time domain resource set indicated by the first signal.

[0102] In an implementation, the start time or end time of the N time domain resources can be determined according to the first signal, for example, the first node indicates the end of the N time domain resources or the start of the N time domain resources every time the first signal is sent.

[0103] In another implementation, the second signal can comprise a temporary identifier or a fixed identifier of the second node.

[0104] In the embodiments of the present disclosure, there are multiple ways for the first signal to indicate the N time domain resource indexes. The multiple ways for the first signal to indicate the N time domain resources can refer to the ways one to six in the foregoing, and the embodiments of the present disclosure will not be described here.

[0105] In the following, various methods for the second node to send the second signal will be described.

[0106] I. randomly determining one transmission resource from the plurality of transmission resources

[0107] FIG. 5 shows a flowchart of sending the second signal. In combination with FIG. 4, as shown in FIG. 5, in the above S402, sending the second signal can include:

[0108] S501. The second node randomly determines one transmission resource from the M transmission resources.

[0109] In an implementation manner, M is not equal to N, and the value of M can be indicated by the first indication information. The first node can flexibly adjust the number of M by sending the first indication information, so as to be more suitable for the number of the second nodes corresponding to the N time domain resource indexes, and improve the transmission efficiency. M is greater than 1. Alternatively, M can also be equal to N. In some embodiments, the first indication information is carried in the access instruction signal or the first signal.

[0110] S502. The second node sends the second signal based on the determined transmission resource.

[0111] The transmission resource includes at least one of the following: a transmission occasion, a transmission sub-band, and an extension code.

[0112] After determining one transmission resource for transmitting the second signal, the second node can send the second signal based on the transmission resource.

[0113] Since the transmission resource includes at least one of the three elements of the transmission occasion, the transmission sub-band, and the extension code, one transmission resource can include one element, and the transmission resource including the three elements will be described respectively in the following.

[0114] For the transmission occasion: one transmission resource includes the transmission occasion, and in the above S502, the second node sends the second signal based on the determined transmission resource can include: the second node determines the transmission delay of the second signal based on the determined transmission occasion (i.e., the transmission occasion in the determined transmission resource), and sends the second signal based on the transmission delay of the second signal.

[0115] It can be understood that the transmission occasion corresponds to the transmission order of the second signal, for example, the transmission occasion indexes 0 to M-1 correspond to the first to the Mth transmitted second signal. The second node can randomly select a transmission occasion from the transmission occasion indexes 0 to M-1 to send the second signal, and the selected transmission occasion corresponds to a transmission order. Transmission order 0 indicates that the second signal is the first to be sent, transmission order 1 indicates that the second signal is the second to be sent, and so on. Transmission order M-1 indicates the Mth to be sent. In this way, multiple second nodes can send the second signal according to the transmission order, thereby reducing the collision probability and improving the access success rate.

[0116] In an implementation manner, in the case that the index of the transmission occasion is 0, the transmission delay of the second signal is predefined or indicated by the first delay indication information. That is, the second signal sent at this transmission occasion is the first to be sent among the multiple second signals, and at this time, the transmission delay of the second signal is the transmission delay after the first signal is received, which can be predefined or indicated by the first node.

[0117] In the case that the index of the transmission occasion is greater than or equal to 1, the transmission delay of the second signal satisfies at least one of the following conditions: D j = T1 + jT D2R + a j T D2R ; D j = T1 + A j T D2R ;

[0118] j is the index of the transmission occasion, D j is the transmission delay of the second signal corresponding to the transmission occasion index j, 1≤j≤M-1, T1 is the transmission delay of the second signal corresponding to the transmission occasion index 0 (i.e., the first second signal), T D2R is the transmission duration of a second signal, t k is the time interval between the second signals corresponding to the transmission occasion indexes k and k+1, a j and A j are predefined delay coefficients.

[0119] It can be understood that T1 is predefined or indicated by the first node, t k is predefined or determined according to T D2R , the greater the value of k, the greater the value of t k , for example, t0=0.21×T D2R , t1=0.47×T D2R , t2=0.77×T D2R ; a j >0, A jThe greater the value of j is, the greater the value of a j Or the greater the value of A j is, the greater the value of D j = T1. In some embodiments, the transmission duration T D2R of a second signal is determined according to at least one of the data rate, the code rate, the modulation mode, the repetition number, and the link frequency of the second signal, or the transmission duration T D2R of a second signal is indicated by the first delay indication information.

[0120] For transmission subbands: in the case where the transmission resource includes transmission subbands, the second node can randomly select a transmission subband from the M transmission subbands and send the second signal on the transmission subband.

[0121] A transmission subband is a frequency domain resource that can be used for signal transmission, and the transmission subband can be a bandwidth part (BWP), a physical resource block, a subcarrier, a subchannel, or a carrier (including an anchor carrier and a non-anchor carrier) composed of frequency domain units.

[0122] For spreading codes: in the case where the transmission resource includes spreading codes, the second node can randomly select a spreading code from the M spreading codes and use the spreading code to spread the data in the second signal, and then send the second signal based on the spreading code.

[0123] The above is a description of the three elements in the transmission resource respectively, and the following will describe the case where the transmission resource includes two or three elements.

[0124] In the case where the transmission resource includes any two of the transmission occasions, the transmission subbands, and the spreading codes, in the determined transmission resource, the index of the first element is mod(k, A), and the index of the second element is The second node can determine the first element and the second element of the two elements respectively, and then determine the index of the two elements respectively, so as to send the second signal based on the two elements.

[0125] Alternatively, the transmission resource index corresponds to the index of the two kinds of elements. The second node can randomly select a transmission resource index from the set of transmission resources, and since the transmission resource index corresponds to the index of the two kinds of elements, the second node can determine the index of the two kinds of elements based on the randomly selected transmission resource index. In some embodiments, the first kind of element includes A configurations, and the second kind of element includes B configurations, and the two kinds of elements jointly include A*B configurations, corresponding to transmission resource indexes 0 to A*B-1. The second node can randomly select a transmission resource index from the transmission resource indexes 0 to A*B-1, thereby determining the index of the two kinds of elements corresponding to the transmission resource index. For example, the second node generates a random number k, and then determines the transmission resource index g = mod(k, A·B), thereby determining {first kind of element index a, second kind of element index b} corresponding to g.

[0126] Alternatively, in the case where the transmission resource includes any two kinds of elements of transmission occasions, transmission subbands, and spreading codes, the second node can randomly select one from the set of the first kind of elements, and randomly select one from the set of the second kind of elements, thereby transmitting the second signal based on the two kinds of elements.

[0127] In the case where the transmission resource includes three kinds of elements of transmission occasions, transmission subbands, and spreading codes, in the determined transmission resource, the index of the first kind of element is mod(k, A), the index of the second kind of element is The index of the third kind of element is The second node can determine the first kind of element and the second kind of element, and the third kind of element of the three kinds of elements respectively, and then determine the index of the three kinds of elements, thereby transmitting the second signal based on the three kinds of elements.

[0128] Alternatively, the transmission resource index corresponds to the index of the three kinds of elements. The second node can randomly select a transmission resource index from the set of transmission resources, and since the transmission resource index corresponds to the index of the three kinds of elements, the second node can determine the index of the three kinds of elements based on the randomly selected transmission resource index. For example, the three kinds of elements jointly include A*B*C element configurations, and the indexes are 0 to A*BC-1. The second node can generate a random number k, and then determine the transmission resource index g = mod(k, A·B·C), thereby determining {first kind of element index a, second kind of element index b, third kind of element index c} corresponding to g.

[0129] Alternatively, in the case where the transmission resource includes three kinds of elements of transmission occasions, transmission subbands, and spreading codes, the second node can randomly select one from the set of the first kind of elements, randomly select one from the set of the second kind of elements, and randomly select one from the set of the third kind of elements, thereby transmitting the second signal based on the three kinds of elements.

[0130] A is the number of the first element, B is the number of the second element, C is the number of the third element, and k is a random number generated by the second node.

[0131] II. Determining the transmission delay of the second signal based on the stored time domain resource index

[0132] FIG. 6 shows another flowchart of sending the second signal. In combination with FIG. 4, as shown in FIG. 6, in the above S402, sending the second signal can include:

[0133] S601, the second node determines the transmission delay of the second signal based on the stored time domain resource index, and sends the second signal based on the transmission delay of the second signal.

[0134] The second node can determine the transmission delay of the second signal based on the currently stored time domain resource index. Different second nodes may store different time domain resource indexes, and thus the time of sending the second signal is also different. In this way, sending multiple second signals at different times can reduce the collision probability of the second signal, thereby improving the success rate of random access.

[0135] In an implementation manner, in a case where the stored time domain resource index is 1, the transmission delay of the second signal is a predefined value or indicated by the first delay indication information (which can be indicated by the first node). That is, the second signal is the first to be sent, and thus the transmission delay of the first sent second signal is the transmission delay after receiving the first signal. This delay can be predefined or indicated by the first node.

[0136] In a case where the stored time domain resource index is greater than or equal to 2, the transmission delay of the second signal satisfies at least one of the following conditions: D i =T1+(i-1)T D2R +a i T D2R ; D i =T1+A j T D2R ;

[0137] i is the stored time domain resource index, D i is the transmission delay of the second signal corresponding to the time domain resource index i, 2≤i≤N, T1 is the transmission delay of the second signal corresponding to the time domain resource index 1 (i.e., the first second signal), T D2R is the transmission duration of a second signal, t k is the time interval between the second signals corresponding to the time domain resource indexes k and k+1, a j and A j are predefined delay coefficients.

[0138] It is understandable that T1 is predefined or indicated by the first node, t k For predefined or according to T D2R Certainly, the larger the value of k, the longer t will be. k The larger the value, for example, t0 = 0.21 × T D2R t1 = 0.47 × T D2R t2 = 0.77 × T D2R ;a j >0, A j >1, the larger the value of j, the better a j Or A j The larger the value of . Furthermore, if j = 0, then D j =T1. In some embodiments, the transmission duration T of a second signal is... D2R The second signal is determined based on at least one of the following: data rate, code rate, modulation scheme, repetition count, and link frequency; or the transmission duration T of a second signal. D2R Indicated by the first node.

[0139] In some embodiments, the second node can determine the time interval G between the end time of the first signal transmission and the start time of the second signal transmission based on the transmission delay of the second signal. The value of G satisfies (1-e)Dd≤G≤(1+e)D+d, where e is the clock error coefficient, d is a duration constant, and D is the transmission delay of the second signal. Thus, the second node can determine how long after receiving the first signal to send the second signal based on the time interval G, i.e., determine the start time of the second signal transmission.

[0140] In one implementation, the time interval between the end time of the transmission of the first signal and the start time of the transmission of the second signal can also be: the interval between the last rising edge of the first signal and the first rising edge of the second signal; or, the interval between the last falling edge of the first signal and the first falling edge of the second signal.

[0141] III. Determining the Transmission Resources of the Second Signal Based on Storage-Based Temporal Resource Indexing

[0142] Figure 7 illustrates another flowchart for transmitting a second signal. Referring to Figure 4, as shown in Figure 7, in the above S402, transmitting the second signal may include:

[0143] S701, The second node determines a transmission resource based on the stored time-domain resource index.

[0144] In an implementation, the N time domain resources correspond to N transmission resources one by one. For example, time domain resources 1 to N correspond to transmission resources 0 to N-1 respectively. In this way, the second node can determine the transmission resource corresponding to the time domain resource index based on the stored time domain resource index.

[0145] S702, the second node sends the second signal based on the determined transmission resource.

[0146] The transmission resource includes at least one of the following: transmission occasion, transmission sub-band, spreading code.

[0147] After determining one transmission resource for transmitting the second signal, the second node can send the second signal based on the transmission resource.

[0148] Since the transmission resource includes at least one of the transmission occasion, the transmission sub-band, and the spreading code, one transmission resource can include one element, which will be described below.

[0149] For the transmission occasion: the transmission resource includes the transmission occasion, and the N time domain resource indexes correspond to N transmission occasions. In S702 described above, the second node sends the second signal based on the determined transmission resource can include: the second node determines the transmission delay of the second signal based on the transmission occasion in the determined transmission resource, and sends the second signal based on the transmission delay of the second signal.

[0150] It can be understood that the transmission occasion corresponds to the transmission order of the second signal, for example, transmission occasion indexes 0 to M-1 correspond to the first to the Mth transmitted second signal. The second node can determine the corresponding transmission occasion according to the stored time domain resource index to send the second signal, and the selected transmission occasion can correspond to a transmission order. Transmission order 0 indicates that the second signal is the first to be sent, transmission order 1 indicates that the second signal is the second to be sent, and so on. Transmission order M-1 indicates the Mth to be sent. In this way, multiple second nodes can send the second signal according to the transmission order, thereby reducing the collision probability and improving the access success rate.

[0151] In another implementation, in the case where the index of the transmission occasion is 0, the transmission delay of the second signal is predefined or indicated by the first delay indication information. That is, the second signal sent at this transmission occasion is the first to be sent among multiple second signals, and at this time, the transmission delay of the second signal is the transmission delay after receiving the first signal, which can be predefined or indicated by the first delay indication information, for example, the first delay indication information is sent by the first node.

[0152] In the case where the index of the transmission occasion is greater than or equal to 1, the transmission delay of the second signal satisfies at least one of the following: D j = T1 + jT D2R + a j T D2R ; D j = T1 + A j T D2R ;

[0153] j is an index of a transmission occasion, D j is a transmission delay of a second signal corresponding to the transmission occasion index j, 1≤j≤M-1, T1 is a transmission delay of a second signal (i.e., the first second signal) corresponding to the transmission occasion index 0, T D2R is a transmission duration of a second signal, t k is a time interval between second signals corresponding to the transmission occasion index k and k+1, a j , A j are predefined delay coefficients.

[0154] It can be understood that T1 is predefined or indicated by the first node, t k is predefined or determined according to T D2R , the greater the value of k, the greater the value of t k , for example, t0=0.21×T D2R , t1=0.47×T D2R , t2=0.77×T D2R ; a j >0, A j >1, the greater the value of j, the greater the value of a j or A j . In addition, if j=0, D j =T1. In some embodiments, the transmission duration T D2R of a second signal is determined according to at least one of a data rate, a code rate, a modulation mode, a repetition number, and a link frequency of the second signal, or the transmission duration T D2R of a second signal is indicated by the first node.

[0155] For a transmission sub-band: in the case where the transmission resource includes a transmission sub-band, the second node can randomly select a transmission sub-band from the M transmission sub-bands and transmit the second signal on the transmission sub-band.

[0156] A transmission sub-band is a frequency domain resource that can be used for signal transmission, and the transmission sub-band can be a frequency domain resource composed of a bandwidth part (BWP), a physical resource block, a subcarrier, a subchannel, or a carrier (including an anchor carrier and a non-anchor carrier).

[0157] For the spreading code: in the case that the transmission resource includes a spreading code, the second node can randomly select a spreading code from the M spreading codes, and spread the data in the second signal with the spreading code, and then send the second signal spreaded based on the spreading code.

[0158] The above is the description of the three elements in the transmission resource respectively, and the following will describe the case that one transmission resource includes two or three elements.

[0159] One transmission resource includes any two elements of the transmission occasion, the transmission sub-band, and the spreading code, and the second node determines the index of the first element in the transmission resource as mod(k, A) or mod(k-1, A) according to the time domain resource index k stored by the second node, and determines the index of the second element as or The second node can determine the first element and the second element of the two elements respectively, and then determine the indexes of the two elements, so as to send the second signal based on the two elements.

[0160] Alternatively, one transmission resource index corresponds to the indexes of two elements. The second node determines the corresponding transmission resource index according to the stored time domain resource index, and since one transmission resource index corresponds to the indexes of two elements, the second node can determine the indexes of the two elements based on the transmission resource index. In some embodiments, the first element contains A configurations, and the second element contains B configurations, and the two elements jointly contain A*B configurations, corresponding to the transmission resource indexes 0 to A*B-1, and the second node can determine a transmission resource index from the transmission resource indexes 0 to A*B-1 according to the time domain resource index stored by the second node, so as to determine the indexes of the two elements corresponding to the transmission resource index. For example, the second node determines the transmission resource index as g = mod(k, A*B) or g = mod(k-1, A*B) according to the time domain resource index k stored by the second node, so as to determine {first element index a, second element index b} corresponding to g.

[0161] One transmission resource includes the transmission occasion, the transmission sub-band, and the spreading code, and the second node determines the index of the first element in the transmission resource as mod(k, A) or mod(k-1, A) according to the time domain resource index k stored by the second node, and determines the index of the second element as or The index of the third element is or The second node can determine the first element and the second element, the third element of the three elements respectively, and then determine the indexes of the three elements, so as to send the second signal based on the three elements.

[0162] Alternatively, one transmission resource index corresponds to the indexes of the three kinds of elements. The second node determines the corresponding transmission resource index according to the stored time domain resource index, and since one transmission resource index corresponds to the indexes of the three kinds of elements, the second node can determine the indexes of the three kinds of elements based on the transmission resource index. For example, the three kinds of elements include A*B*C element configurations in total, and the indexes are 0 to A*B*C-1. The second node determines the transmission resource index as g = mod(k, A*B*C) or g = mod(k-1, A*B*C) according to the stored time domain resource index k, and thus determines the {first kind of element index a, second kind of element index b, third kind of element index c} corresponding to g.

[0163] A is the number of the first kind of elements, B is the number of the second kind of elements, C is the number of the third kind of elements, and k is the time domain resource index stored by the second node.

[0164] The above is the description of the multiple methods for the second node to send the second signal. In the following, other transmission processes in the random access process will be described.

[0165] In some embodiments, FIG. 8 shows a flowchart of a process of selecting a time domain resource index. In combination with FIG. 4, as shown in FIG. 8, before S401, the method further includes:

[0166] S801, the second node receives an access instruction signal.

[0167] The access instruction signal is used to instruct the second node to randomly select a time domain resource index from the time domain resource index range indicated by the access instruction signal.

[0168] S802, the second node randomly selects a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determines a transmission resource for sending the second signal from the transmission resource set.

[0169] After receiving the access instruction signal, the second node can determine to randomly store a time domain resource index from the time domain resource index range. In addition, the second node can also determine in advance a transmission resource for sending the second signal from the transmission resource set. In this way, after receiving the second signal, the second node does not need to determine the transmission resource for sending the second signal, but directly sends the second signal through the previously determined transmission resource. In some embodiments, the second node can determine the stored time domain resource index and the transmission resource for sending the second signal at the same time, or can determine them separately.

[0170] In an implementation manner, the first node receives the second signal by detecting the time domain resources in the time domain resource index range one by one, and thus detects the second signal.

[0171] In some embodiments, the second node randomly selects a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determines a transmission resource for transmitting the second signal from the transmission resource set, including: the second node generates a random number k; determines the time domain resource index as mod(k, S), and determines the transmission resource index as mod(k, P) Alternatively, the second node determines the transmission resource index as mod(k, P), and determines the time domain resource index as where S is the number of time domain resource indexes in the time domain resource index range, and P is the number of transmission resources included in the transmission resource set, and the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and an extension code.

[0172] In yet some embodiments, the second node randomly selects a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determines a transmission resource for transmitting the second signal from the transmission resource set, including: one resource configuration index corresponds to one time domain resource index and one transmission resource index, and the second node can randomly select a resource configuration index, so as to determine the time domain resource index and the transmission resource index corresponding to the resource configuration index. For example, the second node generates a random number k; determines the resource configuration index as mod(k, S·P), where S is the number of time domain resource indexes in the time domain resource index range, and P is the number of transmission resources included in the transmission resource set, and the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and an extension code.

[0173] In yet some embodiments, the second node randomly selects a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determines a transmission resource for transmitting the second signal from the transmission resource set, including: the transmission resource set includes a transmission sub-band set and an extension code set, and the second node randomly selects a time domain resource index from the time domain resource index range, randomly selects a transmission sub-band from the transmission sub-band set, and randomly selects an extension code from the extension code set; or the transmission resource set includes a transmission occasion set and a transmission sub-band set, and the second node randomly selects a time domain resource index from the time domain resource index range, randomly selects a transmission occasion from the transmission occasion set, and randomly selects a transmission sub-band from the transmission sub-band set.

[0174] In the case where the transmission resource includes two elements of a transmission occasion, a transmission sub-band, and an extension code, the P transmission resource indexes included in the transmission resource set correspond to {first element index a, second element index b}, where a = 0, 1, 2, …, A-1, b = 0, 1, 2, …, B-1, A is the number of the first element, and B is the number of the second element.

[0175] In the case where the transmission resource includes three elements of transmission occasion, transmission sub-band and spreading code, the P transmission resource indexes contained in the transmission resource set respectively correspond to {first element index a, second element index b, third element index c}, where a = 0, 1, 2,..., A-1, b = 0, 1, 2,..., B-1, c = 0, 1, 2,..., C-1, A is the number of the first element, B is the number of the second element, and C is the number of the third element. In some embodiments, in the case where the transmission resource includes three elements, the second node can randomly determine each element respectively.

[0176] In the case where the transmission resource includes transmission occasion, the second node randomly selects a transmission occasion from the transmission resource set, determines the transmission delay of the second signal according to the selected transmission occasion, and sends the second signal based on the transmission delay.

[0177] In the case where the transmission resource includes transmission sub-band, the second node randomly selects a transmission sub-band from the transmission resource set and sends the second signal on the transmission sub-band. The transmission sub-band is a frequency domain resource available for signal transmission, and the transmission sub-band can be a BWP, a physical resource block, a subcarrier, a subchannel, or a carrier (including an anchor carrier and a non-anchor carrier) composed of a frequency domain unit.

[0178] In the case where the transmission resource includes spreading code, the second node randomly selects a spreading code from the transmission resource set, spreads the data of the second signal with the spreading code, and then sends the second signal based on the spreading code.

[0179] It should be noted that the manner in which the second node determines the transmission resource for sending the second signal can also refer to the above three methods of sending the second signal, and the embodiments of the present disclosure will not be described here.

[0180] In addition, in the four-step access process, the description of the transmission process of the second node receiving the third signal and sending the fourth signal can refer to the description of the first node sending the third signal and receiving the fourth signal, and the embodiments of the present disclosure will not be described here.

[0181] It can be understood that the communication device comprises a hardware structure and / or a software module corresponding to each function in order to realize the above functions. Those skilled in the art should easily realize that the algorithm steps of each example described in combination with the embodiments of the present disclosure can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driven hardware depends on the specific application of the technical solution and the design constraint conditions. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0182] The embodiments of the present disclosure can divide the function modules of the communication device according to the above-mentioned method embodiments. For example, each function module can be divided according to each function, or two or more functions can be integrated into one function module. The integrated module can be realized in the form of hardware or software. It should be noted that the division of the modules in the embodiments of the present disclosure is illustrative, and is only a logical function division. In actual implementation, there can be another division manner. The following will be described taking the division of each function module according to each function as an example.

[0183] FIG. 9 is a structural schematic diagram of a communication device provided by an embodiment of the present disclosure. The communication device can execute the communication method provided by the above-mentioned method embodiments. As shown in FIG. 9, the communication device comprises a sending unit 901 and a receiving unit 902.

[0184] The sending unit 901 is configured to send a first signal. The first signal is used to indicate N time domain resource indexes, and N is greater than or equal to 1.

[0185] The receiving unit 902 is configured to receive a second signal sent by a second node corresponding to the N time domain resource indexes.

[0186] In an implementation manner, the first signal is used to indicate a first time domain resource index, and the N time domain resource indexes comprise N continuous time domain resource indexes from a second time domain resource index to the first time domain resource index. The second time domain resource index is a next time domain resource index of a time domain resource index indicated by a previous first signal.

[0187] In an implementation manner, the first signal is used to indicate a value of N, and the N time domain resource indexes comprise N continuous time domain resource indexes starting from a second time domain resource index. The second time domain resource index is a next time domain resource index of a last time domain resource index indicated by a previous first signal.

[0188] In an implementation manner, the first signal is used to instruct the second node to subtract N from the stored time domain resource index, the second node corresponding to the N time domain resource indexes is the second node to which the stored time domain resource index belongs to 1 to N, or the difference obtained by subtracting N from the stored time domain resource index is less than or equal to 0.

[0189] In an implementation manner, the first signal is used to instruct a next time domain resource set of a second time domain resource set, the second time domain resource set contains N time domain resources; the next time domain resource set includes N time domain resources, and the indexes of the N time domain resources are the N time domain resource indexes instructed by the current first signal; wherein the second time domain resource set is the time domain resource set instructed by the previous first signal.

[0190] In an implementation manner, the first signal is used to instruct the index of the first time domain resource set, and the first time domain resource set includes N time domain resources, and the indexes of the N time domain resources are the N time domain resource indexes instructed by the first signal.

[0191] In an implementation manner, the sending unit 901 is further used to send an access instruction signal, and the access instruction signal is used to instruct the second node to randomly select a time domain resource index from a time domain resource index range instructed by the access instruction signal.

[0192] In an implementation manner, the sending unit 901 is further used to send a third signal, and the third signal includes the confirmation information of the Z second signals.

[0193] The receiving unit 902 is further used to receive a fourth signal, and the fourth signal includes the fixed identifier of the second node.

[0194] In an implementation manner, the transmission order of the confirmation information of the Z second signals is used to determine the transmission delay of the fourth signal.

[0195] FIG. 10 is a structural schematic diagram of another communication apparatus provided by the embodiment of the present disclosure, and the communication apparatus can execute the communication method provided by the method embodiments.

[0196] The receiving unit 1001 is used to receive a first signal, and the first signal is used to instruct N time domain resource indexes, and N is greater than or equal to 1.

[0197] The sending unit 1002 is used to send a second signal in the case that the second node belongs to the second node corresponding to the N time domain resource indexes.

[0198] In an implementation manner, the first signal is used for indicating the first time domain resource index; the second node corresponding to the N time domain resource indexes comprises: a second node whose stored time domain resource index is within a continuous N time domain resource index range from a second time domain resource index to the first time domain resource index; and the second time domain resource index is a next time domain resource index of a time domain resource index indicated by a previous first signal.

[0199] In an implementation manner, the first signal is used for indicating a value of N, and the N time domain resource indexes comprise continuous N time domain resource indexes starting from a second time domain resource index; and the second time domain resource index is a next time domain resource index of a last time domain resource index indicated by a previous first signal.

[0200] In an implementation manner, the first signal is used for indicating that the second node subtracts N from the stored time domain resource index.

[0201] In an implementation manner, the second node corresponding to the N time domain resource indexes comprises: a second node whose difference obtained by subtracting N from the stored time domain resource index is less than or equal to 0, or a second node whose stored time domain resource index belongs to 1 to N.

[0202] In an implementation manner, the sending unit 1002 is further used for determining that the second node does not belong to the second node corresponding to the N time domain resource indexes in a case that the difference obtained by subtracting N from the stored time domain resource index is greater than 0, and updating the stored time domain resource index as the difference.

[0203] In an implementation manner, the first signal is used for indicating a next time domain resource set of a second time domain resource set, and the time domain resource set comprises N time domain resources; and the second node corresponding to the N time domain resource indexes comprises: a second node whose stored time domain resource index is within a time domain resource set indicated by the first signal; and the second time domain resource set is a time domain resource set indicated by a previous first signal.

[0204] In an implementation manner, the first signal is used for indicating an index of a first time domain resource set, and the first time domain resource set comprises N time domain resource indexes; and the second node corresponding to the N time domain resource indexes comprises: a second node whose stored time domain resource index is within a time domain resource set indicated by the first signal.

[0205] In an implementation manner, the receiving unit 1001 is further used for receiving an access instruction signal, and the access instruction signal is used for indicating that the second node randomly selects a time domain resource index from a time domain resource index range indicated by the access instruction signal.

[0206] In an implementation manner, the apparatus further includes a processing unit 1003, configured to store a time domain resource index randomly from a time domain resource index range indicated by the access instruction signal, and determine a transmission resource for transmitting the second signal from the transmission resource set.

[0207] In an implementation manner, the stored time domain resource index is mod(k, S), and the determined transmission resource index is or, the determined transmission resource index is mod(k, P), and the stored time domain resource index is Wherein, k is a random number generated by the second node, S is a quantity of time domain resource indexes in the time domain resource index range, P is a quantity of transmission resources included in the transmission resource set, and the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and a spreading code.

[0208] In an implementation manner, the processing unit 1003 can be configured to determine a resource configuration index, one resource configuration index corresponds to one time domain resource index and one transmission resource index; determine the stored time domain resource index and the transmission resource for transmitting the second signal based on one resource configuration index; wherein the resource configuration index is mod(k, S·P), k is a random number generated by the second node, S is a quantity of time domain resource indexes in the time domain resource index range, and P is a quantity of transmission resources included in the transmission resource set, and the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and a spreading code.

[0209] In an implementation manner, the sending unit 1002 can be configured to determine a transmission resource randomly from the M transmission resources, or determine a transmission resource based on the stored time domain resource index; and transmit the second signal based on the determined transmission resource, wherein the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and a spreading code.

[0210] In an implementation manner, the sending unit 1002 can be configured to determine a transmission delay of the second signal based on the determined transmission occasion, and transmit the second signal based on the transmission delay of the second signal.

[0211] In an implementation manner, in a case that an index of the transmission occasion is 0, a transmission delay of the second signal is predefined or indicated by the first delay indication information; in a case that an index of the transmission occasion in one transmission resource is greater than or equal to 1, the transmission delay of the second signal satisfies at least one of the following conditions: D j = T1 + jT D2R +a j T D2R ; D j = T1 + A j T D2R ;

[0212] j is an index of a transmission occasion, D j is a transmission delay of a second signal corresponding to an index j of a transmission occasion, 1≤j≤M-1, T1is a transmission delay of a second signal corresponding to an index 0 of a transmission occasion, T D2R is a transmission duration of a second signal, t k is a time interval between second signals corresponding to indexes k and k+1 of a transmission occasion, a j , A j is a predefined delay coefficient.

[0213] In an implementation manner, the transmission resource includes any two elements of the transmission occasion, the transmission sub-band, and the spreading code; in the determined transmission resource, an index of a first element is mod(k, A), and an index of a second element is Alternatively, one transmission resource includes three elements of the transmission occasion, the transmission sub-band, and the spreading code; in the determined transmission resource, an index of a first element is mod(k, A), an index of a second element is , and an index of a third element is Wherein, A is the number of the first element, B is the number of the second element, C is the number of the third element, and k is a random number generated by the second node or a stored time domain resource index.

[0214] In an implementation manner, the transmission resource includes any two elements of the transmission occasion, the transmission sub-band, and the spreading code, and an index of the determined transmission resource corresponds to indexes of the two elements; or the transmission resource includes three elements of the transmission occasion, the transmission sub-band, and the spreading code, and an index of the determined transmission resource corresponds to indexes of the three elements.

[0215] In an implementation manner, the sending unit 1002 can be used to determine a transmission delay of the second signal based on the stored time domain resource index, and send the second signal based on the transmission delay of the second signal.

[0216] In an implementation manner, when the stored time domain resource index is 1, the transmission delay of the second signal is a predefined value or indicated by the first node; when the stored time domain resource index is greater than or equal to 2, the transmission delay of the second signal satisfies at least one of the following conditions: D i =T1+(i-1)T D2R +a i T D2R ; D i =T1+A j T D2R ;

[0217] i is the stored time domain resource index, D iThe transmission delay of the second signal corresponding to the time-domain resource index i, where 2 ≤ i ≤ N, T1 is the transmission delay of the second signal corresponding to the time-domain resource index 1, and T D2R is the transmission duration of one second signal, t k is the time interval between the second signals corresponding to the time-domain resource indices k and k + 1, a j 、A j is a predefined delay coefficient.

[0218] In one implementation, the receiving unit 1001 is further configured to receive a third signal, where the third signal includes acknowledgment information of Z second signals, and Z is greater than 1; the sending unit 1002 is further configured to send a fourth signal when the acknowledgment information of the second signal is included in the acknowledgment information of the Z second signals, and the fourth signal includes a fixed identifier of the second node.

[0219] In one implementation, the transmission delay of the fourth signal is determined based on the transmission order of the acknowledgment information of the second signal in the acknowledgment information of the Z second signals.

[0220] In one implementation, the transmission delay of the fourth signal satisfies at least one of the following: D i = T1 + (i - 1)T EPC + a i T EPC ; D i = T1 + A j T EPC ;

[0221] i is the transmission order of the acknowledgment information of the second signal in the Z acknowledgment information, D i is the transmission delay of the fourth signal corresponding to the i-th acknowledgment information, 1 < i ≤ Z, T1 is the transmission delay of the fourth signal corresponding to the first acknowledgment information, and T EPC is the transmission duration of one fourth signal, t k is the time interval between the second signals corresponding to the transmission orders k and k + 1, a j 、A j is a predefined delay coefficient.

[0222] In one implementation, the processing unit 1003 is further configured to determine, based on the transmission delay of the second signal, the time interval G between the transmission end time of the first signal and the transmission start time of the second signal; where the value range of G satisfies (1 - e)D - d ≤ G ≤ (1 + e)D + d, e is the clock error coefficient, d is the duration constant, and D is the transmission delay of the second signal.

[0223] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide another example structure of the communication apparatus involved in the above-mentioned embodiments. As shown in FIG. 11, the communication apparatus 110 includes a processor 1102, a bus 1104. In some embodiments, the communication apparatus can further include a memory 1101; in some embodiments, the communication apparatus can further include a communication interface 1103.

[0224] The processor 1102 can implement or execute the various exemplary logical blocks, modules, and circuits described in combination with the embodiments of the present disclosure. The processor 1102 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic, hardware components, or any combination thereof, which can implement or execute the various exemplary logical blocks, modules, and circuits described in combination with the embodiments of the present disclosure. The processor 1102 can also be a combination of implementing computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0225] The communication interface 1103 is used to connect with other devices through a communication network. The communication network can be an Ethernet, a wireless access network, a wireless local area network (WLAN), and the like.

[0226] The memory 1101 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0227] As an implementation manner, the memory 1101 can exist independently of the processor 1102, and the memory 1101 can be connected with the processor 1102 through the bus 1104, for storing instructions or program codes. When the processor 1102 invokes and executes the instructions or program codes stored in the memory 1101, the signal transmission method provided by the embodiments of the present disclosure can be implemented.

[0228] In another implementation manner, the memory 1101 can also be integrated with the processor 1102.

[0229] The bus 1104, which can be an extended industry standard architecture (EISA) bus, a peripheral component interconnect (PCI) bus, or another type of bus, enables data transfer between the processor 1102 and other components of the system 1100. The bus 1104 can be divided into an address bus and a data bus between the processor 1102 and other components in the system 1100. For simplicity, only one bus is shown in FIG. 11, but it is understood that the bus 1104 can include multiple buses.

[0230] Some embodiments of the present disclosure provide a computer readable storage medium (for example, a non-transitory computer readable storage medium) having stored computer program instructions, which, when executed on a computer, cause the computer to perform the signal transmission method according to any one of the above embodiments.

[0231] Exemplarily, the above computer readable storage medium can include, but is not limited to, a magnetic storage device (for example, a hard disk, a floppy disk, or a magnetic tape, etc.), an optical disc (for example, a compact disc (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (for example, an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive, etc.). The various computer readable storage media described in the present disclosure can represent one or more devices and / or other machine readable storage media for storing information. The term "machine readable storage medium" can include, but is not limited to, a wireless channel and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0232] The embodiments of the present disclosure provide a computer program product containing instructions, which, when executed on a computer, cause the computer to perform the signal transmission method according to any one of the above embodiments.

[0233] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any change or replacement within the technical scope disclosed in the present disclosure should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A signal transmission method performed by a first node, the method comprising: transmitting a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; receiving a second signal transmitted by a second node corresponding to the N time domain resource indexes.

2. The method of claim 1, wherein, The first signal is used to indicate a first time domain resource index, and the N time domain resource indexes include N consecutive time domain resource indexes from a second time domain resource index to the first time domain resource index, and the second time domain resource index is a next time domain resource index of a time domain resource index indicated by a previous first signal.

3. The method of claim 1, wherein, The first signal is used to indicate a value of the N, and the N time domain resource indexes include N consecutive time domain resource indexes starting from the second time domain resource index, and the second time domain resource index is a next time domain resource index of a last time domain resource index indicated by a previous first signal.

4. The method of claim 1, wherein, The first signal is used to indicate that a time domain resource index stored by the second node is subtracted by N, and the second node corresponding to the N time domain resource indexes is a second node to which the stored time domain resource index belongs to 1 to N or a difference obtained by subtracting N from the stored time domain resource index is less than or equal to 0.

5. The method of claim 1, wherein, The first signal is used to indicate a next time domain resource set of a second time domain resource set, the time domain resource set containing N time domain resources, and the next time domain resource set including N time domain resources with indexes of N time domain resource indexes indicated by the current first signal;wherein the second time domain resource set is a time domain resource set indicated by a previous first signal.

6. The method of claim 1, wherein, The first signal is used to indicate an index of a first time domain resource set, and the first time domain resource set includes N time domain resources with indexes of N time domain resource indexes indicated by the first signal. 7.The method of claim 1, further comprising: transmitting an access instruction signal, the access instruction signal being used to instruct the second node to randomly select a time domain resource index from a time domain resource index range indicated by the access instruction signal.

8. The method of claim 1, wherein, After receiving the second signal transmitted by the second node, the method further comprises: transmitting a third signal, the third signal including confirmation information of Z second signals; receiving a fourth signal, the fourth signal including a fixed identifier of the second node.

9. The method of claim 8, wherein, A transmission order of the confirmation information of the Z second signals is used to determine a transmission delay of the fourth signal. 10.A signal transmission method performed by a second node, the method comprising: receiving a first signal, the first signal being used to indicate N time domain resource indexes, N being greater than or equal to 1; transmitting a second signal in a case where the second node belongs to a second node corresponding to the N time domain resource indexes.

11. The method of claim 10, wherein, The first signal is used to indicate a first time domain resource index, and the second node corresponding to the N time domain resource indexes includes a second node whose stored time domain resource index is within a range of N consecutive time domain resource indexes from a second time domain resource index to the first time domain resource index, and the second time domain resource index is a next time domain resource index of a time domain resource index indicated by a previous first signal.

12. The method of claim 10, wherein, The first signal is used for indicating the value of the N; and the second node corresponding to the N time domain resource indexes comprises a second node whose stored time domain resource index is within a continuous N time domain resource index range starting from a second time domain resource index.

13. The method of claim 10, wherein, The first signal is used for indicating that the second node subtracts N from the stored time domain resource index.

14. The method of claim 10 or 13, wherein, The second node corresponding to the N time domain resource indexes comprises a second node whose stored time domain resource index minus N is less than or equal to 0, or a second node whose stored time domain resource index belongs to 1 to N.

15. The method of claim 10 or 13, further comprising: in a case where the difference obtained by subtracting N from the stored time domain resource index is greater than 0, determining that the second node does not belong to the second node corresponding to the N time domain resource indexes, and updating the stored time domain resource index as the difference.

16. The method of claim 10, wherein, The first signal is used for indicating a next time domain resource set of a second time domain resource set, the time domain resource set containing N time domain resources; and the second node corresponding to the N time domain resource indexes comprises a second node whose stored time domain resource index is within the time domain resource set indicated by the first signal; wherein the second time domain resource set is a time domain resource set indicated by a previous first signal.

17. The method of claim 10, wherein, The first signal is used for indicating an index of a first time domain resource set, the first time domain resource set containing N time domain resource indexes; and the second node corresponding to the N time domain resource indexes comprises a second node whose stored time domain resource index is within the time domain resource set indicated by the first signal.

18. The method of claim 10, wherein, Before the first signal is received, the method further comprises: receiving an access instruction signal, the access instruction signal being used for indicating that the second node randomly selects a time domain resource index from a time domain resource index range indicated by the access instruction signal.

19. The method of claim 18, further comprising: randomly storing a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determining a transmission resource for transmitting the second signal from a transmission resource set.

20. The method of claim 19, wherein, The stored time domain resource index is mod(k, S), and the determined transmission resource index is Alternatively, the determined transmission resource index is mod(k, P), and the stored time domain resource index is wherein k is a random number generated by the second node, S is a quantity of time domain resource indexes within the time domain resource index range, and P is a quantity of transmission resources contained in the transmission resource set, the transmission resource comprising at least one of a transmission occasion, a transmission sub-band, and an extension code.

21. The method of claim 19, wherein, The randomly storing a time domain resource index from the time domain resource index range indicated by the access instruction signal, and determining a transmission resource for transmitting the second signal from a transmission resource set, comprises: determining one resource configuration index, the one resource configuration index corresponding to one time domain resource index and one transmission resource index; determining the stored time domain resource index and the transmission resource for transmitting the second signal based on the one resource configuration index; and The resource configuration index is mod(k, S*P), k is a random number generated by the second node, S is a quantity of time domain resource indexes in the time domain resource index range, and P is a quantity of transmission resources included in the transmission resource set. The transmission resource includes at least one of a transmission occasion, a transmission sub-band, and an extension code.

22. The method of claim 10, wherein, The sending of the second signal includes: randomly determining a transmission resource from the M transmission resources, or determining a transmission resource based on the stored time domain resource index; sending the second signal based on the determined transmission resource, wherein the transmission resource includes at least one of a transmission occasion, a transmission sub-band, and an extension code.

23. The method of claim 22, wherein, The transmission resource includes a transmission occasion, and the sending of the second signal based on the determined transmission resource includes: determining a transmission time delay of the second signal based on the determined transmission occasion, and sending the second signal based on the transmission time delay of the second signal.

24. The method of claim 23, wherein, In a case where an index of the transmission occasion is 0, the transmission time delay of the second signal is predefined or indicated by first time delay indication information. In a case where the index of the transmission occasion is greater than or equal to 1, the transmission delay of the second signal satisfies at least one of the following: D j = T1 + jT D2R + a j T D2R ; D j = T1 + A j T D2R ; wherein j is an index of the transmission occasion, D j is a transmission delay of a second signal corresponding to the index j of the transmission occasion, 1≤j≤M-1, T1 is a transmission delay of a second signal corresponding to the index 0 of the transmission occasion, T D2R is a transmission duration of a second signal, t k is a time interval between second signals corresponding to the index k and k+1 of the transmission occasion, a j , A j is a predefined delay coefficient.

25. The method of claim 22, wherein, The transmission resource includes any two elements of a transmission occasion, a transmission sub-band, and a spreading code; in the determined transmission resource, an index of the first element is mod(k, A), and an index of the second element is mod(k, B) Alternatively, the transmission resource includes three elements of transmission occasion, transmission sub-band and spreading code; in the determined transmission resource, the index of the first element is mod(k, A), the index of the second element is mod(k, B) and the index of the third element is mod(k, C) The index of the third element is A is a quantity of the first kind of elements, B is a quantity of the second kind of elements, C is a quantity of the third kind of elements, and k is a random number generated by the second node or the stored time domain resource index.

26. The method of claim 22, wherein The transmission resource includes any two elements of a transmission occasion, a transmission sub-band, and an extension code, and an index of the determined transmission resource corresponds to indexes of the two elements. Or, the transmission resource includes three elements of a transmission occasion, a transmission sub-band, and an extension code, and an index of the determined transmission resource corresponds to indexes of the three elements.

27. The method of claim 10, wherein, The sending of the second signal includes: determining a transmission time delay of the second signal based on the stored time domain resource index, and sending the second signal based on the transmission time delay of the second signal.

28. The method of claim 27, wherein, In a case where the stored time domain resource index is 1, the transmission time delay of the second signal is a predefined value or indicated by first time delay indication information. In a case where the stored time domain resource index is greater than or equal to 2, the transmission delay of the second signal satisfies at least one of the following: D i = T1+ (i-1)T D2R +a i T D2R ; D i = T1 + A j T D2R ; wherein i is the stored time domain resource index, D i is the transmission delay of the second signal corresponding to the time domain resource index i, 2≤i≤N, T1 is the transmission delay of the second signal corresponding to the time domain resource index 1, T D2R is the transmission duration of one second signal, t k is the time interval between the second signals corresponding to the time domain resource indexes k and k+1, a j , A j is a predefined delay coefficient.

29. The method of claim 10, wherein, After the sending of the second signal, the method further includes: receiving a third signal, the third signal including confirmation information of Z second signals, Z being greater than 1; in a case where the confirmation information of the second signal is included in the confirmation information of the Z second signals, sending a fourth signal, the fourth signal including a fixed identifier of the second node.

30. The method of claim 29, wherein, A transmission time delay of the fourth signal is determined based on a transmission order of the confirmation information of the second signal in the confirmation information of the Z second signals.

31. The method of claim 30, wherein, The transmission delay of the fourth signal satisfies at least one of the following: D i = T1 + (i-1)T EPC +a i T EPC ; D i = T1 + A j T EPC ; wherein i is the transmission order of the second signal in the Z confirmation information, D i is the transmission delay of the fourth signal corresponding to the i-th confirmation information, 1 < i ≤ Z, T EPC is the transmission delay of the fourth signal corresponding to the first confirmation information, T EPC is the transmission delay of the fourth signal corresponding to the first confirmation information, T k is the transmission delay of the fourth signal corresponding to the first confirmation information, T j , A j is a predefined delay coefficient.

32. The method of claim 10, further including: determining a time interval G between a transmission end time of the first signal and a transmission start time of the second signal based on the transmission time delay of the second signal; wherein a value range of G satisfies (1-e)D-d≤G≤(1+e)D+d, e is a clock error coefficient, d is a time constant, and D is the transmission time delay of the second signal.

33. An electronic device, comprising: a memory and a processor; the memory and the processor are coupled; the memory is configured to store instructions executable by the processor; and the processor is configured to execute the instructions to perform the method of any one of claims 1-31. The processor executes the instructions to perform the method according to any one of claims 1-32.

34. A computer readable storage medium, wherein, The computer readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer instructions make the computer perform the method according to any one of claims 1-32.

35. A computer program product, wherein, The computer program product comprises computer program instructions, and when the computer program instructions are executed by a processor, the computer program instructions implement the method according to any one of claims 1-32.

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