WO2025118636A1 - Signal detection method, signal sending method, and apparatus and storage medium - Google Patents

Abstract

Provided are a signal detection method, a signal sending method, and an apparatus and a storage medium. The signal detection method comprises: on the basis of a preamble sequence set and/or a sub-channel set, detecting a first access signal within a first slot range, wherein the first access signal comprises a first preamble sequence and first data information.

Description

Signal detection method, signal sending method, device and storage medium

This disclosure claims priority to Chinese patent application No. 202311648796.7, filed on December 4, 2023, the entire contents of which are incorporated by reference into this application.

Technical Field

The present disclosure relates to the field of communication technology, and in particular to a signal detection method, a signal sending method, a device and a storage medium.

Background Art

In passive IoT communication technology, for the inventory, identification, and access of terminal devices, an anti-collision algorithm based on random time slots is used to avoid time conflicts between access signals sent by multiple terminal devices. In the above process, the terminal randomly selects a time slot within a time slot range to send an access signal, and different terminal devices randomly select different time slots to avoid conflicts when the terminal sends access signals.

Summary of the invention

In a first aspect, an embodiment of the present disclosure provides a signal detection method, which is applied to a first node. The signal detection method includes:

Based on the preamble sequence set and/or the subchannel set, a first access signal is detected within a first time slot range, where the first access signal includes a first preamble sequence and first data information.

In a second aspect, an embodiment of the present disclosure provides a signal sending method, which is applied to a second node. The signal sending method includes:

A first access signal is sent in a time slot within a first time slot range, where the first access signal includes a first preamble sequence and first data information; and the first access signal satisfies at least one of the following:

The first preamble sequence in the first access signal is a preamble sequence in a preamble sequence set;

The subchannel for transmitting the first access signal is a subchannel in the subchannel set.

In a third aspect, an embodiment of the present disclosure provides a communication device. The communication device includes: a processing module;

The processing module is used to detect a first access signal within a first time slot range based on a preamble sequence set and/or a subchannel set, where the first access signal includes a first preamble sequence and first data information.

In a fourth aspect, an embodiment of the present disclosure provides another communication device. The communication device includes: a communication module;

A communication module is configured to send a first access signal in a time slot within a first time slot range, wherein the first access signal includes a first preamble sequence and first data information; and the first access signal satisfies at least one of the following:

The first preamble sequence in the first access signal is a preamble sequence in a preamble sequence set;

The subchannel for transmitting the first access signal is a subchannel in the subchannel set.

In a fifth aspect, an embodiment of the present disclosure provides a communication device, including a processor, which implements the signal detection method of the first aspect above, or implements the signal sending method of the second aspect above, when executing a computer program.

In a sixth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, which includes computer instructions; when the computer instructions are executed, the signal detection method of the first aspect mentioned above is implemented, or the signal sending method of the second aspect mentioned above is implemented.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and a person skilled in the art can also obtain other drawings based on these drawings.

FIG. 1 is a schematic diagram of an architecture of a communication system according to some embodiments.

FIG2 is a schematic flow chart of a signal detection method according to some embodiments.

FIG3 is a schematic flow chart of yet another signal detection method according to some embodiments.

FIG. 4 is a schematic flow chart of yet another signal detection method according to some embodiments.

FIG5 is a schematic flow chart of a signal sending method according to some embodiments.

FIG6 is a schematic flow chart of yet another signal sending method according to some embodiments.

FIG. 7 is a schematic flow chart of yet another signal sending method according to some embodiments.

FIG8 is a schematic diagram of the structure of a communication device according to some embodiments.

FIG9 is a schematic structural diagram of yet another communication device according to some embodiments.

FIG10 is a schematic structural diagram of another communication device according to some embodiments.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

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 article is only a way to describe the association relationship of associated objects, indicating 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 "plurality" means two or more. Expressions such as "first" and "second" do not limit the quantity and execution order, and expressions such as "first" and "second" do not limit them to be different.

It should be noted that in the present disclosure, expressions such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of expressions such as "exemplarily" or "for example" is intended to present related concepts in a detailed manner.

At present, the passive Internet of Things has received widespread attention. The passive terminals in the passive Internet of Things have the advantages of no need for external power supply, strong adaptability, high reliability, high security, low cost, easy installation and good maintainability, so they are widely used in many fields. In the passive Internet of Things communication technology, the random time slot method is used to avoid conflicts when the terminal sends access signals. However, in the random time slot method, the time slots within the time slot range are limited. If the number of terminals exceeds the number of selectable time slots within the time slot range, there will still be a situation where multiple terminal devices select a time slot and send access signals on a time slot.

Based on this, the embodiments of the present disclosure provide a signal detection method and a signal sending method. When the second node sends a first access signal, not only can a time slot within the first time slot range be selected as the time slot for sending the first access signal, but also a preamble sequence in a preamble sequence set can be selected as the preamble sequence of the first access signal and/or a subchannel in a subchannel set can be selected as the subchannel for transmitting the first access signal, thereby reducing the collision probability of the first access signals of multiple second nodes from multiple aspects such as the time domain, frequency domain and code domain, so as to improve the access efficiency of the second nodes.

The signal detection method and signal sending method provided by the present disclosure can be applied to a communication system as shown in Figure 1, which shows a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. As shown in Figure 1, the communication system includes a first node 10 and a second node 20.

In a wireless communication scenario, the first node 10 communicates with the second node 20 through a wireless channel. For example, the first node 10 is a base station, the second node 20 is a terminal, and the base station and the terminal communicate through a wireless channel. For another example, the first node 10 is a terminal, the second node 20 is a wireless router, and the wireless router communicates with the terminal through a wireless channel. For another example, the first node 10 is a first base station, the second node 20 is a second base station, and the first base station and the second base station communicate through a wireless channel. For another example, the first node 10 is a first terminal, the second node 20 is a second terminal, and the first terminal and the second terminal communicate through a wireless channel. For another example, the first node 10 is a repeater, the second node 20 is a base station, and the base station and the repeater communicate through a wireless channel. For another example, the first node 10 is a terminal, the second node 20 is a repeater, and the repeater and the terminal communicate through a wireless channel. For another example, the first node 10 is a first repeater, the second node 20 is a second repeater, and the first repeater and the second repeater communicate through a wireless channel. For another example, the first node 10 is a base station, the second node 20 is a satellite, and the satellite and the base station The stations communicate through wireless channels. For another example, the first node 10 is a satellite, the second node 20 is a base station, and the base station communicates with the satellite through a wireless channel. For another example, the first node 10 is a terminal, the second node 20 is a satellite, and the satellite and the terminal communicate through a wireless channel. For another example, the first node 10 is a satellite, the second node 20 is a terminal, and the terminal and the satellite communicate through a wireless channel. For another example, the first node 10 is a ground device, the second node 20 is an aircraft, and the aircraft communicates with the ground device through a wireless channel. For another example, the first node 10 is a first aircraft, the second node 20 is a second aircraft, and the first aircraft communicates with the second aircraft through a wireless channel.

In the embodiments of the present disclosure, the first node 10 is mainly described by taking the first node 10 as a base station and the second node 20 as a terminal as an example.

In some embodiments, the first node 10 is used to provide wireless access services for multiple terminals. For example, a base station provides a service coverage area (also called a cell). Terminals entering the area can communicate with the base station through wireless signals to receive the wireless access services provided by the base station.

In some embodiments, the first node 10 may be a base station or an evolutionary base station (eNB or eNodeB) in long term evolution (LTE), long term evolution advanced (LTE-A), a base station device in a 5G network, or a base station in a future communication system, etc. The base station may include various network-side devices such as various macro base stations, micro base stations, home base stations, wireless remote devices, reconfigurable intelligent surfaces (RIS), routers, wireless fidelity (WIFI) devices, etc.

In some embodiments, the second node 20 may be a device with wireless transceiver function, which may be deployed on land (including indoor or outdoor, handheld, wearable or vehicle-mounted); may also be deployed on water (such as ships, etc.); may also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present disclosure do not limit the application scenarios. A terminal may sometimes also be referred to as a user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication equipment, UE agent or UE device, etc., but the embodiments of the present disclosure are not limited to this.

It should be noted that FIG1 is only an exemplary framework diagram, and the number of devices included in FIG1 and the names of the devices are not limited. In addition to the devices shown in FIG1 , the communication system may also include other devices (such as core network devices).

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 intended 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. It is known to those skilled in the art that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

FIG2 shows a schematic flow chart of a signal detection method provided by the present disclosure. As shown in FIG2 , the signal detection method is applied to a first node and includes the following steps:

S101. Detect a first access signal within a first time slot range based on a preamble sequence set and/or a subchannel set.

The first access signal includes a first preamble sequence and first data information, and the first preamble sequence is located before the first data information.

In some embodiments, the first preamble sequence is used for signal conflict identification and signal synchronization. Exemplarily, the preamble sequence in the present disclosure may be an m-sequence, a random bit sequence, a sequence with a number distribution of 0 and 1, a ZC sequence, a sequence for encoding predefined information, a sequence jointly generated by multiple sequences, etc. The sequence jointly generated by multiple sequences may be a sequence jointly generated by a wash sequence and a Manchester code, a sequence jointly generated by a PN sequence and a wash sequence, a sequence jointly generated by a pseudo-random ZC sequence and a wash sequence, and a sequence jointly generated by a ZC sequence and a PN sequence.

The data information in the present disclosure may be a random bit sequence, for example, a 16-bit sequence randomly generated by the second node, or the data information may include a portion of the identity (ID) of the second node. Alternatively, the data information may include other sequences or other information, which is not limited by the present disclosure.

In some embodiments, the preamble sequence of the first access signal is a preamble sequence in a preamble sequence set.

The preamble sequence set includes P preamble sequences, where P is a positive integer.

As an implementation manner, the preamble sequence set is predefined.

The preamble sequence set is determined according to the second node type.

Exemplarily, each second node type corresponds to a leading sequence set, and the leading sequence sets corresponding to different second node types may be the same or different. For example, the second node types include type A, type B, and type C. The second node whose second node type is type A and type B corresponds to the leading sequence set U1, and the second node whose second node type is type C corresponds to the leading sequence set U2. The number of leading sequences in the leading sequence set U1 may be greater than, equal to, or less than the number of leading sequences in the leading sequence set U2. Alternatively, the second nodes of type A, type B, and type C all correspond to the leading sequence set U1.

In the case where each second node type corresponds to a preamble sequence set, the first node may determine the second node type according to the preamble sequence in the detected first access signal. For example, the second node types include type A, type B, and type C. The second node whose second node type is type A and type B corresponds to the preamble sequence set U1, and the second node whose second node type is type C corresponds to the preamble sequence set U2. If the preamble sequence detected by the first node is a preamble sequence in the preamble sequence set U1, the second node type is determined to be type A or type B, and if the preamble sequence detected by the first node is a preamble sequence in the preamble sequence set U1, the second node type is determined to be type C.

In some embodiments, the length of the preamble sequence in the first access signal and the second node type also have a corresponding relationship. For example, the second node type includes type A, type B and type C. The second node whose second node type is type A and type B corresponds to the first preamble sequence length, and the second node whose second node type is type C corresponds to the second preamble sequence length. The first node can determine the second node type according to the preamble sequence length detected in the first access signal. If the preamble sequence length detected by the first node is the first preamble sequence length, the second node type is determined to be type A or type B, and if the preamble sequence length detected by the first node is the second preamble sequence length, the second node type is determined to be type C. If the preamble sequence length detected by the first node is the first preamble sequence length, the second node type is determined to be type A or type B, and if the preamble sequence length detected by the first node is the second preamble sequence length, the second node type is determined to be type C.

As another implementation manner, the preamble sequence set is determined based on a configuration parameter of the preamble sequence set.

The configuration parameters of the preamble sequence include at least one of the following: a cyclic shift value, a preamble sequence number, a preamble sequence quantity, a preamble sequence length, and a preamble sequence set number.

In some embodiments, when the configuration parameter of the preamble sequence set indicates that the cyclic shift value is L, the preamble sequence set includes K preamble sequences whose cyclic shift values are L to L+K-1 respectively.

L and K are both positive integers, K is the number of leading sequences included in the leading sequence set, K is greater than or equal to 1, K can be a preset value, or can be set according to the actual application scenario, or can also be determined according to other methods, which is not limited by the present disclosure.

Exemplarily, taking the K value as 5 and the configuration parameter of the preamble sequence set indicating the cyclic shift value L as 2 as an example, in this case, the preamble sequence set includes 5 preamble sequences whose cyclic shift values are 2, 3, 4, 5, and 6 respectively.

In some embodiments, when the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preamble sequences whose preamble sequence numbers are L to L+K-1 respectively.

Exemplarily, taking the K value as 6 and the configuration parameter of the preamble sequence set indicating that the preamble sequence number L is 3 as an example, in this case, the preamble sequence set includes 6 preamble sequences whose preamble sequence numbers are 3, 4, 5, 6, 7, and 8 respectively.

In some embodiments, when K is a preset value, the first node may determine the second node type according to the K value.

Exemplarily, the second node type includes type A, type B, and type C. The K value corresponding to the second node whose second node type is type A and type B is a first value, and the K value corresponding to the second node whose second node type is type C is a second value, and the first value may be greater than or less than the second value. If the K value corresponding to the preamble sequence set corresponding to the preamble sequence of the first access signal detected by the first node is the second value, it is determined that the second node type is type C.

In some embodiments, when the configuration parameter of the preamble sequence set indicates that the preamble sequence length is L, the preamble sequence set includes one or more preamble sequences with the number of data elements being L. The preamble sequence length is used to indicate the number of data elements included in a preamble sequence.

It should be noted that the preamble sequences have high autocorrelation and low mutual correlation, that is, the preamble sequences have orthogonal or approximately orthogonal characteristics. The correlation value between two different preamble sequences is low, and the correlation value between two identical preamble sequences is high. Therefore, when the first node detects the first access signal based on the preamble sequence set, if a higher correlation value is detected, the corresponding preamble sequence can be directly determined according to the correlation value.

In some embodiments, as shown in FIG3 , before the first node detects the first access signal within the first time slot range, the signal detection method further includes the following steps:

S100: Send a first message.

The first message includes at least one of the following: configuration parameters of the first time slot range, configuration parameters of the preamble sequence set, configuration parameters of the subchannel set, first indication information, second indication information, and third indication information;

The first indication information is used to indicate the second node type; the second indication information is used to indicate the access signal type; and the third indication information is used to indicate the access mode.

Exemplarily, the configuration parameter of the first time slot range is used to determine the first time slot range. The configuration parameter indicates a Q value, and the first time slot range determined based on the configuration parameter is 0 to 2 ^Q -1, where Q is an integer and Q is greater than or equal to 0. For example, when the configuration parameter indicates that the Q value is 4, the first time slot range determined based on the configuration parameter is 0 to 15. After the second node receives the first message, it can determine that the first time slot range is 0 to 15 according to the configuration parameter 4 of the first time slot range in the first message, and randomly select a time slot in the first time slot range to transmit the first access signal.

It should be noted that there are multiple time slots within the first time slot range, and a time slot is a time length unit. The time lengths of different time slots may be different. Exemplarily, the first node sends time slot decrement information, and the time slot decrement information is used to determine the start or end of the time slot, for example, the time slot decrement information is used to indicate the end of the previous time slot or the start of the next time slot.

As another example, the configuration parameters of the preamble sequence set are used to determine the preamble sequence set, and the relevant description thereof may refer to the detailed description of the configuration parameters of the preamble sequence above, which will not be repeated here.

As another example, the configuration parameters of the subchannel set are used to determine the subchannel set. For example, if the configuration parameters of the subchannel set indicate F subchannel numbers, then the subchannel set corresponding to the configuration parameters of the subchannel set is a set consisting of subchannels whose subchannel numbers are the above F subchannel numbers. Alternatively, if the configuration parameters of the subchannel set indicate that the subchannel set includes F subchannels, then the subchannel set includes subchannels 0 to F-1, where F is a positive integer. After the second node receives the first message, it can determine the subchannel set based on the configuration parameters of the subchannel set in the first message, and randomly select a subchannel in the subchannel set to transmit the first access signal.

It should be understood that a subchannel is a transmission frequency band, and the measurement unit of the frequency domain width of a subchannel can be a frequency domain unit such as a subcarrier, a physical resource block or Hertz. Different subchannels have different frequency domain positions, and the frequency domain bandwidths of different subchannels can be the same or different.

As another example, the first indication information is used to indicate the second node type. For example, the second node type includes type A, type B, and type C. The first indication information indicates that the second node whose second node type is type A sends the first access signal. After the second node whose second node type is type A receives the first message, the second node determines that it needs to send the first access signal according to the first indication information in the first message.

It should be noted that the first indication information is not only used to indicate the type of the second node, but the first node can also The second node type determines the preamble sequence set, and detects the first access signal based on the preamble sequence set. As described in the above example, the second node type includes type A, type B, and type C. The second node whose second node type is type A and type B corresponds to the preamble sequence set U1, and the second node whose second node type is type C corresponds to the preamble sequence set U2. For example, the first indication information indicates that the second node whose second node type is type A sends the first access signal, and the first node can determine that the preamble sequence set corresponding to the second node type is U1 according to the second node type indicated by the first indication information, and the first node can detect the first access signal based on the preamble sequence set U1.

As another example, the second indication information is used to indicate the access signal type. The access signal type includes a backscatter signal and an independently generated signal. For example, if the second indication information indicates that the first access signal sent by the second node is a backscatter signal, then after receiving the first message, the second node determines that the access signal type of the first access signal is a backscatter signal according to the second indication information, and sends the first access signal whose access signal type is a backscatter signal.

It should be noted that different access signal types correspond to different preamble sequence sets. For example, a backscatter signal corresponds to a preamble sequence set U1, and an independently generated signal corresponds to a preamble sequence set U2. The access signal type indicated by the second indication information is a backscatter signal. The first node may determine that the preamble sequence set corresponding to the access signal type is U1 according to the access signal type indicated by the second indication information, and detect the first access signal based on the preamble sequence set U1.

As another example, the third indication information is used to indicate an access mode. The access modes include a first backscatter access mode, a second backscatter access mode, and an active communication access mode. For example, the first backscatter access mode includes a periodically triggered backscatter access, the second backscatter access mode includes a non-periodically triggered backscatter access, and the access modes supported by the second nodes of different second node types may be the same or different. For example, the second nodes of the second node types A and B support the first backscatter access mode, and the second nodes of the second node type C support the second backscatter access mode and the active communication access mode. For another example, when the access mode indicated by the third indication information is the first backscatter access mode, the second nodes of the second node types A and B that support the first backscatter access mode, after receiving the first message, determine that they need to send the first access signal in the first backscatter access mode according to the third indication information in the first message.

It should be noted that different access modes correspond to different or the same second node types, so the second node type can be determined according to the access mode. In addition, different second node types correspond to different preamble sequence sets, and the preamble sequence set can be determined according to the third indication information. For example, as described in the above example, the second node type includes type A, type B, and type C. The second node whose second node type is type A and type B corresponds to the preamble sequence set U1, the second node whose second node type is type C corresponds to the preamble sequence set U2, the second node of the second node type A and B supports the first backscatter access mode, and the second node of the second node type C supports the second backscatter access mode and the active communication access mode. Taking the access mode indicated by the third indication information as the active communication access mode as an example, only the second node of the second node type C supports the active communication access mode, then the first node determines that the preamble set corresponding to the access mode is U2 according to the active communication node mode indicated by the third indication information, and detects the first access signal based on the preamble sequence set U2.

In this way, when the second node sends the first access signal, not only can a time slot within the first time slot range be selected as the time slot for sending the first access signal, but a preamble sequence in a preamble sequence set can also be selected as the preamble sequence of the first access signal and/or a subchannel in a subchannel set can be selected as the subchannel for transmitting the first access signal, thereby reducing the probability of collision of the first access signals of multiple second nodes from multiple aspects such as the time domain, frequency domain and code domain, so as to improve the access efficiency of the second nodes.

In some embodiments, the first node detects the first access signal within the first time slot range based on the preamble sequence set and/or the subchannel set, and at least one of the following detection results occurs:

1. The first node detects a first access signal in a time slot within a first time slot range (ie, detects a preamble sequence of the first access signal) and correctly decodes data information of the first access signal.

It should be noted that the detection result indicates that only one second node selects the time slot to send the first access signal.

2. The first node does not detect the first access signal in a time slot within the first time slot range (i.e., does not detect the first access signal before guide sequence).

It should be noted that the detection result indicates that no second node selects the time slot to send the first access signal, and the time slot is an idle transmission resource.

3. The first node detects N first access signals in a time slot within the first time slot range (ie, detects N preamble sequences of the first access signals), where N is a positive integer.

It should be understood that in some technologies, in the access signal sent by the second node, different preamble sequences are orthogonal or approximately orthogonal, and the access signals sent by multiple second nodes use the same preamble sequence, or use mutually orthogonal or approximately orthogonal preamble sequences, so the first node can successfully detect the preamble sequence; and the data information between different access signals is different, so the first node cannot correctly decode the data information in the first access signal, which also means that multiple access signals conflict, and the first node needs to resend the access signal so that the second node completes the access process.

In some embodiments, when N first access signals are detected in one time slot in the first time slot range, or when N first access signals are detected in one time slot in the first time slot range and data information of the N first access signals is not correctly decoded, the first node sends a second message to trigger the second node that sends the first access signal in the time slot to send a second access signal, and then the first node detects the second access signal. As shown in FIG. 4, the above process can be implemented as the following steps:

S102: When N first access signals are detected in a time slot in the first time slot range, send a second message in the time slot.

The second message includes at least one of the following: configuration parameters of the second time slot range, fourth indication information, fifth indication information, and sixth indication information. The fourth indication information is used to indicate at least one first preamble sequence among the first preamble sequences respectively included in the N first access signals; the fifth indication information is used to indicate at least one subchannel among the subchannels respectively used by the N first access signals; the sixth indication information is used to indicate that the first node has detected the first preamble sequence; and N is a positive integer.

Exemplarily, the configuration parameter of the second time slot range is used to indicate the second time slot range, so that the second node sending the first access signal on the above time slot randomly selects a time slot in the second time slot range to send the second access signal.

As another example, the fourth indication information includes a first bitmap, the first bitmap includes K indicator bits, each indicator bit corresponds to a leading sequence in the leading sequence set, and the value of the indicator bit is used to indicate whether the leading sequence corresponding to the indicator bit is the first leading sequence indicated by the fourth indication information, K is the number of leading sequences included in the leading sequence set, and K is a positive integer. For example, the leading sequence set includes K leading sequences, and each leading sequence in the K leading sequences corresponds to an indicator bit in the first bitmap. The indicator bit with a value of 1 is used to indicate that the leading sequence corresponding to the indicator bit is the first leading sequence indicated by the fourth indication information. Take the example that the leading sequence set includes 15 sequences, which correspond to the 15 indicator bits in the first bitmap respectively. If the first bit map is 000 0000 0000 0001, it means that the preamble sequence indicated by the fourth indication information is the first preamble sequence in the preamble sequence set; if the first bit map is 100 0000 0000 0001, it means that the preamble sequence indicated by the fourth indication information is the first preamble sequence and the fifteenth preamble sequence in the preamble sequence set; if the first bit map is 100 0000 0100 0010, it means that the preamble sequence indicated by the fourth indication information is the second preamble sequence, the seventh preamble sequence and the fifteenth preamble sequence in the preamble sequence set.

As another example, the fourth indication information includes at least one first indication field, and each first indication field is used to indicate a first leading sequence. For example, the fourth indication information includes n first indication fields, n is a positive integer, and n is less than or equal to N, and the value of n is determined according to the fourth indication information, or n is a fixed value. For another example, n is a fixed value of 1, then the fourth indication information is used to indicate a first leading sequence in the first leading sequences each of the N first access signals contains. For another example, the fourth indication information includes an instruction index, and the instruction index corresponds to the number n of the first indication fields in the fourth indication information, for example, the n value corresponding to the instruction index I is a first value, and the n value corresponding to the instruction index J is a second value. In some other embodiments, the fourth indication information includes an n value indication field and n leading sequence indication fields, the n value indication field is located before the n leading sequence indication fields, and the value of n is determined by the n value indication field.

It should be noted that each first access signal uses a first preamble sequence, and the N first access signals use M first preamble sequences, where M is less than or equal to N, that is, multiple access signals among the N first access signals use the same preamble sequence. The indication information can indicate one first preamble sequence among the first preamble sequences respectively included in the N first access signals. The first node can indicate the M first preamble sequences respectively by sending M fourth indication information. Alternatively, the fourth indication information is used to indicate n preamble sequences among the first preamble sequences respectively included in the N first access signals, where n is a positive integer and n is less than or equal to M. The number of first preamble sequences indicated by different fourth indication information may be the same or different. The first node can indicate M first preamble sequences by sending k fourth indication information, where k is a positive integer and k is less than M. Taking M as 5 and k as 2 as an example, the first node sends the fourth indication information twice. The fourth indication information sent for the first time indicates 3 preamble sequences among the 5 first preamble sequences, and the fourth indication information sent for the second time indicates the remaining 2 preamble sequences among the 5 first preamble sequences. Alternatively, the fourth indication information can indicate all the first preamble sequences in the first preamble sequences respectively included in the N first access signals, and the first node only needs to send the fourth indication information once to indicate all the first preamble sequences in the first preamble sequences respectively included in the N first access signals.

As another example, the fifth indication information includes a second bitmap, the second bitmap includes P indication bits, each of the P indication bits corresponds to a subchannel in the subchannel set, and the value of the indication bit is used to indicate whether the subchannel corresponding to the indication bit is the subchannel indicated by the fifth indication information, P is the number of subchannels contained in the subchannel set, and P is a positive integer. For example, the subchannel set includes P subchannels, and each of the P subchannels corresponds to an indication bit in the second bitmap. An indication bit with a value of 1 is used to indicate that the subchannel corresponding to the indication bit is the subchannel indicated by the fifth indication information. Take the example that the subchannel set includes 8 subchannels, which correspond to 8 indication bits in the second bitmap respectively. If the second bitmap is 0000 0001, it means that the subchannel indicated by the fifth indication information is the first subchannel in the subchannel set, and if the second bitmap is 0000 1001, it means that the subchannel indicated by the fifth indication information is the first subchannel and the fourth subchannel in the subchannel set.

As another example, the fifth indication information includes at least one second indication field, and each second indication field is used to indicate a subchannel. For example, the value of the second indication field corresponds to the sequence number of the subchannel indicated by the fifth indication information, that is, when the value of the second indication field is 2, the subchannel indicated by the fifth indication information is the subchannel with sequence number 2.

It should be noted that each first access signal transmission occupies one subchannel, and the transmission of N first access signals occupies M subchannels, where M is less than or equal to N, that is, multiple access signals among the N first access signals use the same subchannel. The fifth indication information can indicate one subchannel among the subchannels used by each of the N first access signals, and the first node can indicate the M subchannels respectively by sending M fifth indication information. Alternatively, the fifth indication information is used to indicate the first n subchannels among the subchannels used by each of the N first access signals, where n is a positive integer and n is less than or equal to M. The number of subchannels indicated by different fifth indication information may be the same or different. The first node can indicate M subchannels by sending k fifth indication information, where k is a positive integer and k is less than M. Taking M as 5 and k as 2 as an example, the first node sends the fifth indication information twice, the first fifth indication information sent indicates 3 subchannels among the subchannels used by each of the five first access signals, and the second fifth indication information sent indicates the remaining 2 subchannels among the subchannels used by each of the five first access signals. Alternatively, the fifth indication information can indicate all the sub-channels used by each of the N first access signals. The first node only needs to send the fifth indication information once to indicate all the sub-channels used by each of the N first access signals.

As another example, the sixth indication information is used to indicate that the first node has detected the first preamble sequence. For example, when the sixth indication information is 1, it indicates that the first node has detected the first preamble sequence, and when the second node that sends the first access signal in the above time slot receives the sixth indication information, it sends the second access signal.

In this way, when the first node fails to successfully decode the data information of the first access signal due to a time slot conflict, the second node with the time slot conflict is triggered to send a second access signal by sending a second message to re-decode the second access signal, thereby improving the access efficiency and success rate of the second node.

S103: Detect a second access signal within a second time slot range.

The second access signal includes a second preamble sequence and second data information.

As an implementation manner, detecting the second access signal within the second time slot range may be implemented as the following steps: based on the preamble sequence set or the first At least one first preamble sequence indicated by the fourth indication information detects a second access signal within a second time slot range.

Exemplarily, the first node may detect the second access signal within the second time slot based on a fixed preamble sequence in the preamble sequence set. The first node may also detect the second access signal within the second time slot based on each preamble sequence in the preamble sequence set. The first node may also detect the second access signal within the second time slot based on any preamble sequence in the preamble sequence set and at least one first preamble sequence indicated by the fourth indication information.

As another implementation manner, detecting the second access signal within the second time slot range may be implemented as the following steps: detecting the second access signal within the second time slot range based on the subchannel set or at least one subchannel indicated by the fifth indication information.

Exemplarily, the first node may detect the second access signal within the second time slot based on a fixed subchannel in the subchannel set. The first node may also detect the second access signal within the second time slot based on each subchannel in the subchannel set. The first node may also detect the second access signal within the second time slot based on the subchannel set and any subchannel in at least one first subchannel indicated by the fourth indication information.

Exemplarily, the second time slot range is determined based on the configuration parameters of the second time slot range. For example, the maximum time slot value in the second time slot range is determined to be S-1 according to the configuration parameters of the second time slot range, and then the second time slot range is determined to be time slot 0 to S-1, and S is greater than or equal to 1. For another example, the second time slot range is a predefined fixed time slot range, such as time slot 0 to time slot 3. For another example, the second time slot range is the same as the first time slot range.

As another example, the second preamble sequence is a fixed preamble sequence in the preamble sequence set, for example, the second preamble sequence is the first preamble sequence in the preamble sequence set, and the first node detects the second access signal based on the first preamble sequence in the preamble sequence set. Alternatively, the second preamble sequence is the first first preamble sequence indicated by the fourth indication information, and the first node detects the second access signal based on the first first preamble sequence indicated by the fourth indication information. In the case where the fourth indication information indicates a single first preamble sequence, the second preamble sequence is the first preamble sequence of the fourth indication information.

In this way, when sending the second access signal, the multiple second nodes only use the same designated preamble sequence, and when the first node detects the preamble sequence, the detection complexity can be reduced.

As another example, the second preamble sequence is a preamble sequence randomly selected from the preamble sequence set, and the first node detects the second access signal based on the preamble sequence set. In this way, the multiple second nodes re-randomly select a preamble sequence from the preamble sequence set, so that multiple preamble sequences in the preamble sequence set are selected and used, and the first node can evaluate the number of second nodes according to the number of preamble sequences used in the preamble sequence set, and can determine the number of second nodes that have conflicts, so as to effectively adjust the allocated transmission resources.

As another example, the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node, and the first node detects the second access signal based on the first preamble sequence indicated by the fourth indication information. Alternatively, the second access signal sent by the second node triggered by the second message uses the same second preamble sequence.

As another example, the second message also includes indication information of a second preamble sequence, the indication information is used to directly indicate the second preamble sequence, and the second preamble sequence is the preamble sequence indicated by the indication information of the second preamble sequence carried by the second message. Alternatively, the second message also includes indication information of a preamble sequence set, the indication information is used to indicate a preamble sequence set, and the second preamble sequence is a preamble sequence in the preamble sequence set indicated by the indication information of the preamble sequence set carried by the second message. When the second node receives the second message, the corresponding preamble sequence set is determined according to the indication information of the preamble sequence set carried by the second message, and a preamble sequence is randomly selected from the preamble sequence set as the second preamble sequence.

As an implementation manner, detecting the second access signal within the second time slot range may be implemented as the following steps: detecting the second access signal within the second time slot range on at least one subchannel indicated by the fifth indication information; or, detecting the second access signal within the second time slot range on a fixed subchannel within the subchannel set; or, detecting the second access signal on each subchannel within the subchannel set. The second access signal is detected within a second time slot range.

As another example, the subchannel for transmitting the second access signal is a subchannel randomly selected from the subchannel set, and the first node detects the second access signal in the subchannel set. Alternatively, the subchannel for transmitting the second access signal is a fixed subchannel in the subchannel set. For example, the subchannel for transmitting the second access signal is the first subchannel in the subchannel set, and the first node detects the second access signal on the first subchannel in the subchannel set. Alternatively, the subchannel for transmitting the second access signal is the first subchannel indicated by the fifth indication information carried by the second message, and the first node detects the second access signal on the first subchannel indicated by the fifth indication information. Alternatively, the subchannel for transmitting the second access signal is the same as the subchannel for transmitting the first access signal by the same second node, and the first node detects the second access signal on the subchannel indicated by the fifth indication information. Alternatively, the second message also includes indication information of the subchannel, which is used to directly indicate the subchannel, and the subchannel for transmitting the second access signal is the subchannel indicated by the indication information of the subchannel carried by the second message. Alternatively, the second message also includes indication information of a subchannel set, and the indication information of the first subchannel set is used to indicate a subchannel set, and the subchannel for transmitting the second access signal is a subchannel in the subchannel set indicated by the indication information of the subchannel set carried by the second message. When the second node receives the second message, the subchannel set is determined according to the indication information of the subchannel set carried by the second message, and a subchannel in the subchannel set is randomly selected as the subchannel for transmitting the second access signal.

In some embodiments, after receiving the first access signal or the second access signal, the first node sends access confirmation information.

The access confirmation information is used to indicate that the first node has received the first access signal or the second access signal. The access confirmation information includes the data information or message Message2 in the corresponding first access signal or the second access signal. Message2 includes basic information of the first node, network configuration information, etc.

In some embodiments, after the first node sends the access confirmation information, a physical uplink channel signal is received.

The physical uplink channel signal includes a third preamble sequence and physical uplink channel data, and the preamble sequence is located before the physical uplink channel data. The third preamble sequence is a fixed preamble sequence. Alternatively, the third preamble sequence is a preamble sequence selected by the second node from a preamble sequence set. Exemplarily, the preamble sequence set used by the third preamble sequence is different from the preamble sequence set used by the first preamble sequence or the second preamble sequence. Alternatively, the third preamble sequence is a preamble sequence determined based on a cell ID corresponding to the second node. Alternatively, the third preamble sequence is a preamble sequence directly indicated by the first node.

FIG5 shows a schematic flow chart of a signal sending method provided by the present disclosure. As shown in FIG5 , the signal sending method is applied to the second node and includes the following steps:

S201. Send a first access signal in a time slot within a first time slot range.

The first access signal includes a first preamble sequence and first data information, and the first access signal satisfies at least one of the following: the first preamble sequence in the first access signal is a preamble sequence in a preamble sequence set; and the subchannel for transmitting the first access signal is a subchannel in a subchannel set.

As an implementation manner, the preamble sequence set is predefined.

The preamble sequence set is determined according to the second node type, and each second node type corresponds to a preamble sequence set.

As another implementation manner, the preamble sequence set is determined based on a configuration parameter of the preamble sequence set.

The configuration parameters of the preamble sequence include at least one of the following: a cyclic shift value, a preamble sequence number, a preamble sequence quantity, a preamble sequence length, and a preamble sequence set number.

In some embodiments, when the configuration parameter of the preamble sequence set indicates that the cyclic shift value is L, the preamble sequence set includes K preamble sequences whose cyclic shift values are L to L+K-1 respectively; or,

When the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preamble sequences whose preamble sequence numbers are L to L+K-1 respectively; L and K are both positive integers, and K is the number of preamble sequences included in the preamble sequence set.

In some embodiments, before the second node sends the first access signal in a time slot within the first time slot range, as shown in FIG6 , the signal sending method further includes the following steps:

S200: Receive a first message.

Receive a first message, the first message including at least one of the following: configuration parameters of a first time slot range, configuration parameters of a preamble sequence set, configuration parameters of a subchannel set, first indication information, second indication information, and third indication information; the first indication information is used to indicate a second node type; the second indication information is used to indicate an access signal type; and the third indication information is used to indicate an access method.

Exemplarily, after receiving the first message, the second node determines the first time slot range according to the configuration parameters of the first time slot range carried in the first message, and randomly selects a time slot in the first time slot range to send the first access signal.

As another example, after receiving the first message, the second node determines a preamble sequence set according to configuration parameters of the preamble sequence set carried in the first message, and randomly selects a preamble sequence in the preamble sequence set as a preamble sequence of the first access signal.

As another example, after receiving the first message, the second node determines the subchannel set according to the configuration parameters of the subchannel set carried in the first message, and randomly selects a subchannel in the subchannel set as the subchannel for transmitting the first access signal.

In this way, when the second node sends the first access signal, not only can a time slot within the first time slot range be selected as the time slot for sending the first access signal, but a preamble sequence in a preamble sequence set can also be selected as the preamble sequence of the first access signal and/or a subchannel in a subchannel set can be selected as the subchannel for transmitting the first access signal, thereby reducing the probability of collision of the first access signals of multiple second nodes from multiple aspects such as the time domain, frequency domain and code domain, so as to improve the access efficiency of the second nodes.

As another example, the first indication information is used to indicate the second node type. After receiving the first indication information, if the type of the second node belongs to the second node type indicated by the first indication information, the second node sends the first access signal. In some examples, the second node determines a preamble sequence set according to the second node type, and selects a preamble sequence from the preamble sequence set as the first preamble sequence of the first access signal; or, the second node determines a subchannel set according to the second node type, and selects a subchannel from the subchannel set to transmit the first access signal.

As another example, the second indication information is used to indicate the access signal type, and the access signal type includes a backscatter signal and an independently generated signal. After receiving the second indication information, the second node sends the first access signal if the access signal type of the second node belongs to the access signal type indicated by the second indication information. In some examples, the second node determines a preamble sequence set according to the access signal type, and selects a preamble sequence from the preamble sequence set as the first preamble sequence of the first access signal; or, the second node determines a subchannel set according to the access signal type, and selects a subchannel from the subchannel set to transmit the first access signal.

As another example, the third indication information is used to indicate an access mode, and the access mode includes a first backscatter access mode, a second backscatter access mode, and an active communication access mode. For example, the first backscatter access mode includes a periodic backscatter access mode, and the second backscatter access mode includes a non-periodic backscatter access mode. The access modes supported by second nodes of different second node types may be the same or different. After receiving the third indication information, if the access mode of the second node belongs to the access mode indicated by the third indication information, the second node sends a first access signal. In some examples, the second node determines a preamble sequence set according to the access mode, and selects a preamble sequence from the preamble sequence set as the first preamble sequence of the first access signal; or, the second node determines a subchannel set according to the access mode, and selects a subchannel from the subchannel set to transmit the first access signal.

In some embodiments, when a conflict occurs in the first access signal of the second node, the second node needs to resend the access signal so that the first node can correctly decode the data information in the access signal. As shown in FIG. 7 , the above process can be implemented as the following steps:

S202: Receive a second message.

In some embodiments, the second message is used to trigger a second node that sends a first access signal in a time slot to send a second access signal.

In some embodiments, the second message includes at least one of the following: configuration parameters of the second time slot range, fourth indication information, fifth indication information, and sixth indication information; the fourth indication information is used to indicate the Nth time slot detected by the first node in a time slot within the first time slot range. At least one of the first preamble sequences contained in each access signal; the fifth indication information is used to indicate at least one sub-channel of the sub-channels used by each of the above N first access signals; and the sixth indication information is used to indicate that the first node has detected the first preamble sequence.

The fourth indication information includes a first bitmap, the first bitmap includes K indication bits, each of the K indication bits corresponds to a preamble sequence in the preamble sequence set, the value of the indication bit is used to indicate whether the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the fourth indication information, K is the number of preamble sequences included in the preamble sequence set, and K is a positive integer. Alternatively, the fourth indication information includes at least one first indication field, and each first indication field is used to indicate a first preamble sequence.

The fifth indication information includes a second bitmap, the second bitmap includes P indication bits, each of the P indication bits corresponds to a subchannel in the subchannel set; the value of the indication bit is used to indicate whether the subchannel corresponding to the indication bit is the subchannel indicated by the fifth indication information, P is the number of subchannels included in the subchannel set, and P is a positive integer. Alternatively, the fifth indication information includes at least one second indication field, and each second indication field is used to indicate a subchannel.

S203: When a preset condition is met, send a second access signal in a time slot within a second time slot range.

As an implementation manner, when the second message meets a preset condition, it is determined to send the second access signal.

Pre-conditions include any of the following:

After sending a first access signal on a time slot within a first time slot range, a second message is received on the time slot, and at least one first preamble sequence indicated by the fourth indication information carried by the second message includes the first preamble sequence of the first access signal; after sending a first access signal on a time slot within the first time slot range, a second message is received on the time slot, and at least one subchannel indicated by the fifth indication information carried by the second message includes the subchannel for transmitting the first access signal; after sending a first access signal on a time slot within the first time slot range, a second message is received on the time slot, and the second message carries sixth indication information.

Exemplarily, when a preset condition is met, the second node sends a second access signal in a time slot within the second time slot range, including at least the following three situations:

Case 1: After the second node sends a first access signal in a time slot within the first time slot range, if a second message is received in the time slot, and the first preamble sequence indicated by the fourth indication information carried by the second message includes the first preamble sequence of the first access signal sent by the second node, then the second access signal is sent in a time slot within the second time slot range.

Case 2: After the second node sends the first access signal in a time slot within the first time slot range, if the second message is received in the time slot, and the subchannel indicated by the fifth indication information carried by the second message includes the subchannel on which the second node transmits the first access signal, then the second access signal is sent in a time slot within the second time slot range.

Case three: after the second node sends the first access signal in a time slot within the first time slot range, if the second message is received in the time slot and the second message carries the sixth indication information, the second node sends the second access signal in a time slot within the second time slot range.

As another implementation manner, when the second message indicates to send the second access signal, it is determined to send the second access signal.

Exemplarily, the second message may directly indicate whether to send the second access signal. In the case where the second message directly indicates whether to send the second access signal, the second node may directly determine whether to send the second access signal according to the indication content of the second message.

The second access signal includes a second preamble sequence and second data information.

In some embodiments, the second time slot range is determined based on a configuration parameter of the second time slot range; or, the second time slot range is predefined; or, the second time slot range is the same as the first time slot range.

Exemplarily, the second time slot range may be predefined, for example, the second time slot range may be a fixed time slot range corresponding to the second message. Alternatively, the second time slot range is determined based on a configuration parameter of the second time slot range carried by the second message; or, the second time slot range is the same as the first time slot range.

In some embodiments, the second preamble sequence is a fixed preamble sequence in the preamble sequence set, for example, The second preamble sequence is the first first preamble sequence indicated by the fourth indication information; or, the second preamble sequence is the first first preamble sequence indicated by the fourth indication information. When the fourth indication information indicates a single first preamble sequence, the second preamble sequence is the first preamble sequence of the fourth indication information; or, the second preamble sequence is a preamble sequence randomly selected from the above-mentioned preamble sequence set; or, the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node.

In some embodiments, the subchannel for transmitting the second access signal is a subchannel randomly selected from the subchannel set; or, the subchannel for transmitting the second access signal is a fixed subchannel in the subchannel set, such as the first subchannel in the subchannel set; or, the subchannel for transmitting the second access signal is the first subchannel indicated by the fifth indication information carried by the second message; or, the subchannel for transmitting the second access signal is the same as the subchannel for transmitting the first access signal sent by the same second node.

In this way, when the first node fails to successfully decode the data information of the first access signal due to time slot conflict, the second node continues to send the second access signal, so that the first node continues to decode the second access signal, thereby improving the access efficiency and success rate of the second node.

As an implementation manner, the second node sends a second access signal based on the second message.

Exemplarily, the second node determines the second time slot range based on the configuration parameters of the second time slot range carried by the second message, and randomly selects a time slot in the second time slot range to send the second access signal. The second node determines the second preamble sequence of the second access signal based on the fourth indication information carried by the second message. The second node determines the subchannel for transmitting the second access signal based on the fifth indication information carried by the second message.

In some embodiments, the above method also includes: receiving access confirmation information.

The access confirmation information is used to indicate that the first node has received the first access signal or the second access signal. The access confirmation information includes the data information or message Message2 in the corresponding first access signal or the second access signal. Message2 includes basic information of the first node, network configuration information, etc.

In some embodiments, when the second node receives the access confirmation information, a physical uplink channel signal is sent.

The physical uplink channel signal includes a third preamble sequence and physical uplink channel data, and the preamble sequence is located before the physical uplink channel data. The third preamble sequence is a fixed preamble sequence. Alternatively, the third preamble sequence is a preamble sequence selected by the second node from a preamble sequence set. Exemplarily, the preamble sequence set used by the third preamble sequence is different from the preamble sequence set used by the first preamble sequence or the second preamble sequence. Alternatively, the third preamble sequence is a preamble sequence determined based on a cell identity (identity, ID) corresponding to the second node. Alternatively, the third preamble sequence is a preamble sequence directly indicated by the first node.

It is understandable that, in order to implement the above functions, the communication device includes hardware structures and/or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

The embodiments of the present disclosure may divide the functional modules of the communication device according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above integrated modules may be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

FIG8 is a schematic diagram of the structure of a communication device applied to a first node provided in an embodiment of the present disclosure, and the communication device 80 can execute the signal detection method provided in the above method embodiment. As shown in FIG8 , the communication device 80 includes a processing module 801 .

The processing module 801 is configured to detect a first access signal within a first time slot range based on a preamble sequence set and/or a subchannel set, where the first access signal includes a first preamble sequence and first data information.

In some embodiments, the preamble sequence set is predefined; or, the preamble sequence set is determined based on a configuration parameter of the preamble sequence set.

In some embodiments, the configuration parameters of the preamble sequence set include at least one of the following: a cyclic shift value, a preamble sequence number, a preamble sequence quantity, a preamble sequence length, and a preamble sequence set number.

In some embodiments, when the configuration parameter of the preamble sequence set indicates that the cyclic shift value is L, the preamble sequence set includes K preamble sequences whose cyclic shift values are L to L+K-1 respectively; or, when the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preamble sequences whose preamble sequence numbers are L to L+K-1 respectively; L and K are both positive integers, and K is the number of preamble sequences included in the preamble sequence set.

In some embodiments, the preamble sequence set is predefined, including: the preamble sequence set is determined according to the second node type.

In some embodiments, each second node type corresponds to a set of preamble sequences.

In some embodiments, the above-mentioned communication device 80 also includes a communication module 802, which is used to send a first message, and the first message includes at least one of the following: configuration parameters of the first time slot range, configuration parameters of the preamble sequence set, configuration parameters of the subchannel set, first indication information, second indication information and third indication information; the first indication information is used to indicate the second node type; the second indication information is used to indicate the access signal type; the third indication information is used to indicate the access method.

In some embodiments, the communication module 802 is further configured to send a second message in a time slot when N first access signals are detected in a time slot in the first time slot range, where N is a positive integer.

In some embodiments, the second message is used to trigger a second node that sends a first access signal in a time slot to send a second access signal.

In some embodiments, the second message includes at least one of the following: configuration parameters of the second time slot range, fourth indication information, fifth indication information, and sixth indication information; the fourth indication information is used to indicate at least one first preamble sequence among the first preamble sequences respectively contained in the N first access signals; the fifth indication information is used to indicate at least one subchannel among the subchannels respectively used by the N first access signals; the sixth indication information is used to indicate that the first node has detected the first preamble sequence, and N is a positive integer.

In some embodiments, the fourth indication information includes a first bit map, the first bit map includes K indicator bits, each of the K indicator bits corresponds to a preamble sequence in a preamble sequence set, the value of the indicator bit is used to indicate whether the preamble sequence corresponding to the indicator bit is the first preamble sequence indicated by the first indication information, K is the number of preamble sequences included in the preamble sequence set, and K is a positive integer.

In some embodiments, the fourth indication information includes at least one first indication field, and each first indication field is used to indicate a first preamble sequence indicated by the fourth indication information.

In some embodiments, the fifth indication information includes a second bitmap, the second bitmap includes P indicator bits, each of the P indicator bits corresponds to a subchannel in the subchannel set; the value of the indicator bit is used to indicate whether the subchannel corresponding to the indicator bit is the subchannel indicated by the fifth indication information, P is the number of subchannels included in the subchannel set, and P is a positive integer.

In some embodiments, the fifth indication information includes at least one second indication field, and each second indication field is used to indicate a sub-channel indicated by the fifth indication information.

In some embodiments, the processing module 801 is further configured to detect a second access signal within a second time slot range, where the second access signal includes a second preamble sequence and second data information.

In some embodiments, the second time slot range is determined based on a configuration parameter of the second time slot range; or, the second time slot range is predefined; or, the second time slot range is the same as the first time slot range.

In some embodiments, the processing module 801 is configured to: detect a second access signal within a second time slot range based on the preamble sequence set or at least one first preamble sequence indicated by the fourth indication information.

In some embodiments, the processing module 801 is configured to: detect the second access signal within the second time slot range based on the sub-channel set or at least one sub-channel indicated by the fifth indication information.

FIG9 is a schematic diagram of the structure of a communication device applied to a second node provided in an embodiment of the present disclosure. The communication device 90 can execute the signal sending method provided in the above method embodiment. As shown in FIG9 , the communication device 90 includes a sending module 901.

The sending module 901 is used to send a first access signal in a time slot within a first time slot range, where the first access signal includes a first preamble sequence and first data information; the first access signal satisfies at least one of the following: the first preamble sequence in the first access signal is a preamble sequence in a preamble sequence set; the subchannel for transmitting the first access signal is a subchannel in a subchannel set.

In some embodiments, the above-mentioned communication device 90 also includes a receiving module 902, which is used to receive a first message, and the first message includes at least one of the following: configuration parameters of the first time slot range, configuration parameters of the preamble sequence set, configuration parameters of the subchannel set, first indication information, second indication information and third indication information; the first indication information is used to indicate the second node type; the second indication information is used to indicate the access signal type; the third indication information is used to indicate the access method.

In some embodiments, the receiving module 902 is used to receive a second message, and the second message includes at least one of the following: configuration parameters of the second time slot range, fourth indication information, fifth indication information, and sixth indication information; the fourth indication information is used to indicate at least one first preamble sequence among the first preamble sequences each contained in N first access signals detected by the first node in a time slot in the first time slot range; the fifth indication information is used to indicate at least one subchannel among the subchannels each used by the N first access signals; and the sixth indication information is used to indicate the first preamble sequence detected by the first node.

In some embodiments, the sending module 901 is used to: send a second access signal on a time slot within the second time slot range when a preset condition is met; the second access signal includes a second preamble sequence and a second data information; the preset condition includes any one of the following: after sending a first access signal on a time slot within the first time slot range, a second message is received on the time slot, and at least one first preamble sequence indicated by the fourth indication information carried by the second message includes the first preamble sequence of the first access signal; after sending a first access signal on a time slot within the first time slot range, a second message is received on the time slot, and at least one sub-channel indicated by the fifth indication information carried by the second message includes the sub-channel for transmitting the first access signal; after sending a first access signal on a time slot within the first time slot range, a second message is received on the time slot, and the second message carries the sixth indication information.

In some embodiments, the second preamble sequence is the first first preamble sequence among at least one first preamble sequence indicated by the fourth indication information; or, the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node; or the second preamble sequence is a preamble sequence randomly selected from a preamble sequence set; or, the second preamble sequence is a fixed preamble sequence in a preamble sequence set.

In some embodiments, the subchannel for transmitting the second access signal is the same as the subchannel used by the same second node to transmit the first access signal; or, the subchannel for transmitting the second access signal is the first subchannel of at least one subchannel indicated by the fifth indication information; or, the subchannel for transmitting the second access signal is the first subchannel in the subchannel set; or, the subchannel for transmitting the second access signal is a subchannel randomly selected by the second node in the subchannel set.

In some embodiments, the second time slot range is determined based on a configuration parameter of the second time slot range; or, the second time slot range is predefined; or, the second time slot range is the same as the first time slot range.

In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiment of the present disclosure provides another structure of the communication device involved in the above-mentioned embodiment. As shown in Figure 10, the communication device 100 includes: a processor 1002 and a bus 1004. In some embodiments, the communication device 100 may also include a memory 1001; in some embodiments, the communication device 100 may also include a communication interface 1003.

The processor 1002 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1002 may 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 devices, transistor logic devices, hardware components, or any combination thereof. The processor 1002 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1002 may also be a combination that implements computing functions, such as a processor that implements ... Contains a combination of one or more microprocessors, a combination of DSP and microprocessor, etc.

The communication interface 1003 is used to connect with other devices through a communication network. The communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

The memory 1001 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a 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.

As an implementation, the memory 1001 may exist independently of the processor 1002, and the memory 1001 may be connected to the processor 1002 via the bus 1004 to store instructions or program codes. When the processor 1002 calls and executes the instructions or program codes stored in the memory 1001, the signal detection method or signal sending method provided in the embodiment of the present disclosure can be implemented.

In another implementation, the memory 1001 may also be integrated with the processor 1002 .

The bus 1004 may be an extended industry standard architecture (EISA) bus, etc. The bus 1004 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, FIG10 only uses one thick line, but does not mean that there is only one bus or one type of bus.

Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes a signal detection method or a signal sending method as in any of the above-mentioned embodiments.

Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., Compact Disks (CDs), Digital Versatile Disks (DVDs), etc.), smart cards and flash memory devices (e.g., Erasable Programmable Read-Only Memory (EPROMs), cards, sticks or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

An embodiment of the present disclosure provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the signal detection method or signal sending method described in any one of the above embodiments.

The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims (27)

A signal detection method, wherein the method is applied to a first node and comprises: Based on the preamble sequence set and/or the subchannel set, a first access signal is detected within a first time slot range, where the first access signal includes a first preamble sequence and first data information. The method according to claim 1, wherein the preamble sequence set is predefined; or, the preamble sequence set is determined based on a configuration parameter of the preamble sequence set. The method according to claim 2, wherein the configuration parameters of the preamble sequence set include at least one of the following: a cyclic shift value, a preamble sequence number, a preamble sequence quantity, a preamble sequence length, and a preamble sequence set number. The method according to claim 3, wherein In a case where the configuration parameter of the preamble sequence set indicates that the cyclic shift value is L, the preamble sequence set includes K preamble sequences whose cyclic shift values are L to L+K-1 respectively; or, When the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preamble sequences whose preamble sequence numbers are L to L+K-1 respectively; wherein L and K are both positive integers, and K is the number of preamble sequences included in the preamble sequence set. The method according to claim 2, wherein the preamble sequence set is predefined, comprising: the preamble sequence set is determined according to the second node type. The method according to claim 5, wherein each second node type corresponds to a preamble sequence set. The method according to claim 1, wherein before detecting the first access signal within the first time slot range, the method further comprises: A first message is sent, wherein the first message includes at least one of the following: configuration parameters of the first time slot range, configuration parameters of the preamble sequence set, configuration parameters of the subchannel set, first indication information, second indication information and third indication information; wherein the first indication information is used to indicate the second node type; the second indication information is used to indicate the access signal type; and the third indication information is used to indicate the access method. The method according to claim 1, further comprising: In the case where N first access signals are detected in a time slot in the first time slot range, a second message is sent in the time slot, where N is a positive integer. The method according to claim 8, wherein the second message is used to trigger a second node that sends the first access signal on the time slot to send a second access signal. The method according to claim 8, wherein the second message includes at least one of the following: configuration parameters of the second time slot range, fourth indication information, fifth indication information, and sixth indication information; wherein the fourth indication information is used to indicate at least one of the first preamble sequences contained in each of the N first access signals; the fifth indication information is used to indicate at least one of the sub-channels used by each of the N first access signals; and the sixth indication information is used to indicate that the first node has detected the first preamble sequence, and N is a positive integer. The method according to claim 10, wherein the fourth indication information includes a first bitmap, the first bitmap includes K indicator bits, each of the K indicator bits corresponds to a preamble sequence in the preamble sequence set, and the value of the indicator bit is used to indicate whether the preamble sequence corresponding to the indicator bit is the first preamble sequence indicated by the fourth indication information, K is the number of preamble sequences contained in the preamble sequence set, and K is a positive integer. The method according to claim 10, wherein the fourth indication information comprises at least one first indication field, and each first indication field in the at least one first indication field is used to indicate a first preamble sequence. The method according to claim 10, wherein the fifth indication information includes a second bitmap, the second bitmap includes P indicator bits, each of the P indicator bits corresponds to a subchannel in the subchannel set; the value of the indicator bit is used to indicate whether the subchannel corresponding to the indicator bit is the subchannel indicated by the fifth indication information, P is the number of subchannels included in the subchannel set, and P is a positive integer. The method according to claim 10, wherein the fifth indication information comprises at least one second indication field, and each second indication field in the at least one second indication field is used to indicate a sub-channel. The method according to claim 9, further comprising: A second access signal is detected within a second time slot range, where the second access signal includes a second preamble sequence and second data information. The method according to claim 15, wherein the second time slot range is determined based on a configuration parameter of the second time slot range; or, the second time slot range is predefined; or, the second time slot range is the same as the first time slot range. The method according to claim 15, wherein the detecting the second access signal within the second time slot range comprises: Based on the preamble sequence set or at least one first preamble sequence indicated by the fourth indication information, the second access signal is detected within the second time slot range. The method according to claim 16, wherein the detecting the second access signal within the second time slot range comprises: Based on the sub-channel set or at least one sub-channel indicated by the fifth indication information, the second access signal is detected within the second time slot range. A signal transmission method, wherein the method is applied to a second node and comprises: A first access signal is sent in a time slot within a first time slot range, wherein the first access signal includes a first preamble sequence and first data information; wherein the first access signal satisfies at least one of the following: The first preamble sequence in the first access signal is a preamble sequence in a preamble sequence set; The subchannel for transmitting the first access signal is a subchannel in a subchannel set. The method according to claim 19, wherein before sending the first access signal in a time slot within the first time slot range, the method further comprises: Receive a first message, the first message comprising at least one of the following: configuration parameters of the first time slot range, configuration parameters of the preamble sequence set, configuration parameters of the subchannel set, first indication information, second indication information and third indication information; wherein the first indication information is used to indicate the second node type; the second indication information is used to indicate the access signal type; and the third indication information is used to indicate the access method. The method according to claim 19, further comprising: Receive a second message, the second message comprising at least one of the following: configuration parameters of a second time slot range, fourth indication information, fifth indication information, and sixth indication information; wherein the fourth indication information is used to indicate at least one first preamble sequence among the first preamble sequences respectively contained in N first access signals detected by the first node in a time slot in the first time slot range; the fifth indication information is used to indicate at least one subchannel among the subchannels respectively used by the N first access signals; and the sixth indication information is used to indicate that the first node has detected the first preamble sequence. The method according to claim 21, further comprising: When a preset condition is met, a second access signal is sent in a time slot within the second time slot range; wherein the second access signal includes a second preamble sequence and second data information; and the preset condition includes any one of the following: After sending a first access signal in a time slot within a first time slot range, a second message is received in the time slot, and at least one first preamble sequence indicated by fourth indication information carried by the second message includes a first preamble sequence of the first access signal; After sending a first access signal in a time slot within a first time slot range, a second message is received in the time slot, and at least one subchannel indicated by fifth indication information carried by the second message includes a subchannel for transmitting the first access signal; After sending a first access signal in a time slot within the first time slot range, a second message is received in the time slot, and the second message carries the sixth indication information. The method according to claim 22, wherein The second preamble sequence is the first first preamble sequence among the at least one first preamble sequence indicated by the fourth indication information; or, The second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node; or, The second preamble sequence is a preamble sequence randomly selected from the preamble sequence set; or, The second preamble sequence is a fixed preamble sequence in the preamble sequence set. The method according to claim 22, wherein The subchannel for transmitting the second access signal is the same as the subchannel used by the same second node to transmit the first access signal; or, The subchannel for transmitting the second access signal is the first subchannel of the at least one subchannel indicated by the fifth indication information; or, The subchannel for transmitting the second access signal is the first subchannel in the subchannel set; or, The subchannel for transmitting the second access signal is a subchannel randomly selected by the second node from the subchannel set. The method according to claim 22, wherein the second time slot range is determined based on a configuration parameter of the second time slot range; or, the second time slot range is predefined; or, the second time slot range is the same as the first time slot range. A communication device comprises a processor, wherein when the processor executes a computer program, the processor implements the signal detection method according to any one of claims 1 to 18, or implements the signal sending method according to any one of claims 19 to 25. A computer-readable storage medium, wherein the computer-readable storage medium includes computer instructions; wherein, when the computer instructions are executed, the signal detection method according to any one of claims 1 to 18 is implemented, or the signal sending method according to any one of claims 19 to 25 is implemented.