CN115276935A

CN115276935A - Signal frame sending method and device

Info

Publication number: CN115276935A
Application number: CN202210825587.4A
Authority: CN
Inventors: 郑泽榕; 班先亮; 鲁立; 刘海溶; 常伟
Original assignee: Shenzhen Penglongtong Technology Co ltd
Current assignee: Shenzhen Penglongtong Technology Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-11-01
Anticipated expiration: 2042-07-14
Also published as: CN115276935B

Abstract

The application discloses a signal frame sending method and a device, wherein the method is applied to a target node, the target node is one of a plurality of nodes in an ad hoc network system, node related information is distributed to the target node, the node related information comprises the total number of nodes of the ad hoc network system and the number of the target node, and the method comprises the following steps: determining a plurality of time domain positions corresponding to the detection frames according to the total number of the nodes; determining a target time domain position in a plurality of time domain positions corresponding to the target node according to the target node number; and sending target detection information at the target time domain position to form a detection frame, wherein the target detection information is used for detecting adjacent nodes in the plurality of nodes by the target node. Each target node in the ad hoc network system of the embodiment of the application determines the time domain position corresponding to the target node, and sends the detection information of the target node at the time domain position to form a complete detection frame. The sounding frame is a time division multiplexing frame, so that the occupation of air interface resources can be reduced.

Description

Signal frame sending method and device

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting a signal frame.

Background

The self-organizing network is a network combining mobile communication and computer network, the information exchange of the network adopts the packet exchange mechanism in the computer network, the user terminal is a portable terminal which can be moved, and each user terminal in the self-organizing network has two functions of router and host. The ad hoc network has the characteristics of dynamic change of a network topology structure, ad hoc centerless network, multiple networks and the like.

Existing ad hoc network organizations are mostly managed through the IP layer (network layer). The IP layer has the advantages of being capable of being rapidly combined with applications, working at an L3 routing layer and being capable of being well decoupled from the transmission of the bottom layer. The IP layer also has some disadvantages, such as relatively large network overhead, large node information update delay, and the like, and when the network scale is relatively large, such as a thousand-scale drone swarm, the network management overhead may even affect the service throughput. The Wifi wireless ad hoc network and a beacon (beacon) frame defined by a MAC layer (data link layer) are used for discovery of network nodes, but the definition and supported functions of the beacon frame are too complex and redundant. Fails to provide an efficient method for wireless ad hoc node probing.

Disclosure of Invention

The embodiment of the application provides a signal frame sending method and a signal frame sending device. The sounding frame is a time division multiplexing frame, so that the occupation of air interface resources can be reduced.

In a first aspect, a signal frame sending method is provided, which is applied to a target node, where the target node is one of multiple nodes in an ad hoc network system, the target node is assigned with node-related information, and the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, and the method includes:

determining a plurality of time domain positions corresponding to the detection frames according to the total number of the nodes;

determining a target time domain position in a plurality of time domain positions corresponding to the target node according to the target node number;

and sending target detection information at the target time domain position to form a detection frame, wherein the target detection information is used for detecting adjacent nodes in the plurality of nodes by the target node.

It can be seen that, in the embodiment of the present application, the time domain position for sending the probe information of each node in the ad hoc network system is divided according to the preset mode, then each node that constructs the ad hoc network system sends its own probe information at its corresponding time domain position, and the probe information of all nodes forms a complete probe frame according to the preset mode. The probe frame is constructed in a time division multiplexing mode, so that the probe frame overhead can be greatly reduced.

In one possible design, the target sounding information may include pilot synchronization information, and/or a target node number.

In the embodiment of the present application, the detection information of each node includes pilot synchronization information and/or a target node number, and does not include data information, so that the efficiency of establishing, receiving, transmitting, and reading a detection frame can be improved, and the efficiency of detecting an adjacent node can be improved.

In one possible design, the method further includes:

receiving the detection information of other nodes;

determining whether other nodes are adjacent nodes of the target node;

and the other nodes are nodes except the target node in the ad hoc network system.

In one possible design, the target time domain position corresponds to a plurality of frequency domain positions, and sending the target probe information at the target time domain position includes: target probe information is transmitted at a target frequency domain position of a plurality of frequency domain positions of a target time domain position.

Therefore, in the embodiment of the application, the time-frequency position for sending the detection information of each node in the ad hoc network system is divided according to the preset mode, and then each node which constructs the ad hoc network system sends the detection information of the node at the corresponding time-frequency position, so that a complete detection frame is formed. The sounding frame is constructed in a mode of combining frequency division multiplexing and frequency division multiplexing, so that the overhead of the sounding frame can be further reduced.

In one possible design, the ad hoc network system is a half-duplex communication system, the target time domain position includes a first target time slot and a second target time slot, and the sending the target probe information at the target frequency domain position of the plurality of frequency domain positions includes:

respectively sending target detection information at a first target frequency domain position in a plurality of frequency domain positions of a first target time slot and a second target frequency domain position in a plurality of frequency domain positions of a second target time slot; the method further comprises the following steps: the method comprises the steps of sending detection information of a first node at other frequency domain positions in a plurality of frequency domain positions of a first target time slot, sending detection information of a second node at other frequency domain positions in a plurality of frequency domain positions of a second target time slot, wherein the first node and the second node are nodes except a target node in an ad hoc network system, and the first node and the second node are different nodes.

In one possible design, the multiple pieces of sounding information in the sounding frame correspond to a target orthogonal code word, and the target orthogonal code word is one of the multiple orthogonal code words corresponding to the sounding frame.

It can be seen that, in the embodiment of the present application, the time-frequency position used for sending the detection information of each node in the ad hoc network system is divided according to a preset manner, and a plurality of code words are set, so that each node corresponds to a first position formed by one code word and the time-frequency position. And each node which constructs the ad hoc network system sends the detection information of the node at the corresponding first position to form a complete detection frame. The probe frame is constructed in a mode of combining frequency division multiplexing, frequency division multiplexing and code division, and data information of each node is not included, so that the probe frame overhead can be reduced to the maximum extent.

In a second aspect, a signal frame sending apparatus is provided, which is applied to a target node, where the target node is one of multiple nodes in an ad hoc network system, the target node is assigned with node-related information, and the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, and the apparatus includes:

the determining unit is used for determining a plurality of time domain positions corresponding to the detection frames according to the total number of the nodes;

the determining unit is further used for determining a target time domain position in the plurality of time domain positions corresponding to the target node according to the target node number;

and the sending unit is used for sending target detection information at a target time domain position to form a detection frame, wherein the target detection information is used for detecting adjacent nodes in the plurality of nodes by a target node.

In one possible design, the apparatus further includes:

a receiving unit, configured to receive probe information of other nodes;

the determining unit is also used for determining whether other nodes are adjacent nodes of the target node;

In one possible design, the target time domain location corresponds to a plurality of frequency domain locations, and the sending unit is specifically configured to: target probe information is transmitted at a target frequency domain location of a plurality of frequency domain locations of the target time domain location.

In one possible design, the ad hoc network system is a half-duplex communication system, the target time domain position includes a first target time slot and a second target time slot, and the sending unit is specifically configured to:

respectively sending target detection information at a first target frequency domain position in a plurality of frequency domain positions of a first target time slot and a second target frequency domain position in a plurality of frequency domain positions of a second target time slot;

the sending unit is further configured to: the method comprises the steps of sending the detection information of a first node at other frequency domain positions in a plurality of frequency domain positions of a first target time slot, sending the detection information of a second node at other frequency domain positions in a plurality of frequency domain positions of a second target time slot, wherein the first node and the second node are nodes except a target node in an ad hoc network system, and the first node and the second node are different nodes.

In a third aspect, an embodiment of the present application provides a communication apparatus, including:

a memory to store instructions; and

at least one processor coupled to the memory;

wherein the instructions, when executed by the at least one processor, cause the processor to perform the method of the first aspect or any of the first aspects.

In a fourth aspect, an embodiment of the present application provides a chip system, including: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the system-on-chip to implement the method of the first aspect or any of the first aspects described above.

Optionally, the system-on-chip further comprises an interface circuit for interacting code instructions to the processor.

Optionally, the number of processors in the chip system may be one or more, and the processors may be implemented by hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

Optionally, the memory in the system-on-chip may also be one or more. The memory may be integrated with the processor or may be separate from the processor, which is not limited in this application. For example, the memory may be a non-transitory processor, such as a read only memory ROM, which may be integrated on the same chip as the processor, or may be separately disposed on different chips, and the type of the memory and the arrangement of the memory and the processor are not particularly limited in this application.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program or instructions, which, when executed, cause a computer to perform the method of the first aspect or any of the first aspects.

In a sixth aspect, an embodiment of the present application provides a computer program product, which, when read and executed by a computer, causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a beacon frame according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of an ad hoc network system according to an embodiment of the present application;

fig. 3A is a flowchart of a method for transmitting a signal frame according to an embodiment of the present application;

fig. 3B is a schematic diagram illustrating division of time domain resources according to an embodiment of the present application;

fig. 3C is a schematic diagram illustrating a probe information composition according to an embodiment of the present disclosure;

fig. 3D is a schematic diagram of a process of using a probe frame for node discovery according to an embodiment of the present disclosure;

fig. 4A is a flowchart of another method for sending a signal frame according to an embodiment of the present application;

fig. 4B is a schematic diagram of a frequency division multiplexing channel according to an embodiment of the present application;

fig. 5A is a flowchart of another method for sending a signal frame according to an embodiment of the present application;

fig. 5B is a schematic diagram of a time-frequency resource provided in the embodiment of the present application;

fig. 6A is a schematic diagram of code division multiplexing communication according to an embodiment of the present application;

fig. 6B is a flowchart of another method for sending a signal frame according to an embodiment of the present application;

FIG. 6C is a schematic view of a first position provided by the present application;

fig. 7 is a block diagram of a signal frame transmitting apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic hardware structure diagram of a communication device in an embodiment of the present application.

Detailed Description

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

"plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Reference will first be made to the terms referred to in the embodiments of the present application, in conjunction with the drawings.

Ad hoc networking: each user terminal (node) in the ad hoc network has two functions of a router and a host. When the ad hoc network is constructed, the following processes are included: the (neighboring) node discovers, receives, and completes synchronization and data transmission with the neighboring node.

Data frame: the protocol data unit refers to a data link layer, and comprises three parts: frame header, data section, frame trailer. The frame head and the frame tail contain necessary control information, such as synchronization information, address information, error control information, and the like; the data portion includes data passed down by the network layer, such as IP packets, etc. For example, a Media Access Control (MAC) frame is a data frame corresponding to a TCP/IP Protocol, a Point to Point Protocol (PPP) frame is a data frame corresponding to a PPP Protocol, a beacon (beacon) frame is a data frame corresponding to a wifi Protocol, and another beacon frame is also one of MAC frames.

Beacon frame: the beacon frame is a broadcast signaling frame with certain functionality. The wireless Access Point (AP) may send out periodically at certain time intervals, so as to inform the outside of the existence of its wireless network. Referring to fig. 1, fig. 1 is a schematic structural diagram of a beacon frame according to an embodiment of the present disclosure, as shown in fig. 1, the beacon frame is a MAC frame, and includes a MAC header (MAC header), and the MAC header includes:

frame control information, which mainly includes a protocol version number (version), a frame type (type), a subframe type (subtype), and frame control fields (frame control flags). Where the frame type field, 00 denotes a management frame, 01 denotes a control frame, 10 denotes a data frame, and 11 denotes a reservation frame. The subframe type and frame type combination can be used to determine a specific frame, for example, frame type =00, subframe type =1000, indicating a beacon frame. The frame control field contains many identification bits indicating some types of information of the frame.

(1) Duration (duration): indicating the duration of the occupied channel.

(2) Address 1: is referred to as the destination MAC address. Since the beacon frame is a broadcast frame, the destination MAC addresses are all FFs.

(3) Address 2: refers to the source MAC address. The source MAC address represents the MAC address of the AP that sent the beacon frame.

(4) Basic Service Set Identifier (Basic Service Set Identifier), which is generally the MAC address of an AP, is used to determine whether a received frame belongs to the network.

(5) Sequence Number (Seq Number) is a Number assigned to an upper layer frame when MAC transmission is delivered.

(6) Fragment Number (Frag Number) for identifying the frame fragment.

Frame Body (Frame Body): the method comprises the fields of a timestamp for sending a beacon frame, a sending time interval, performance information, a supporting rate, a data to-be-transmitted indication, wifi access protection and the like.

FCS: frame Check Sequence (Frame Check Sequence): for checking the integrity of the frame.

Aiming at large-scale dense networking, the method can quickly discover the adjacent nodes and shorten the networking time. Conventional ad hoc network discovery is mainly implemented at the IP layer or through MAC frames. Node discovery in ad hoc networking may be achieved, for example, through beacon frames. But the MAC overhead is large. The beacon frame as described above contains many parameters, the frame control information may occupy 30 bytes (bytes), and the frame body may 2313 bytes, which may result in a large overhead and a long time for communication.

Assuming that a 1K (thousand) scale swarm ad hoc wireless communication network is deployed, network node detection implemented by an IP layer requires at least 1K-order unidirectional air interface data frames to ensure that all nodes discover each other and update node states. Based on the existing traditional discovery mechanism and the ad hoc network channel competition mechanism (carrier sense multiple access csma or time division multiple access tdma), the air interface may have a large amount of channel conflicts, and the message sending delay is large. The process not only has huge air interface resource overhead, occupies air interface time slot resources for a long time, but also has large delay, and is an inefficient mode in general.

Based on this, the embodiment of the present application discloses a signal frame sending method, which is applied to a target node, where the target node is any one of multiple nodes in an ad hoc network system as shown in fig. 2, and the target node is assigned with node-related information, and the node-related information includes the total number of nodes in the ad hoc network system and a target node number corresponding to the target node. The total number of nodes is 1000, for example, and the target node number is 01, 02, \8230or101, for example. It may be a processing center in front of the component ad hoc network system that distributes node related information.

Fig. 3A is a flowchart of a method for sending a signal frame according to an embodiment of the present application, and as shown in fig. 3A, the method includes the following steps:

101. and the target node determines a plurality of time domain positions corresponding to the detection frames according to the total number of the nodes.

In the embodiment of the present application, the sounding frame may be preset to be a Time-division multiplexing (TDM) frame. That is, the sounding frame is composed of time domain resources for transmitting sounding information of all target nodes. Certainly, nodes in the ad hoc network system can send probe information in a TDM manner to form a probe frame, provided that the ad hoc network is a time-synchronized ad hoc network (all nodes are time-synchronized), or the time for sending the probe information by all nodes can be aligned, including alignment before networking or alignment when sending the probe information, which is not specifically limited in the embodiment of the present application.

The sounding frames themselves have different lengths, and the number of time domain resources into which the sounding frames can be divided also differs. For example, the sounding frame length is 10ms (milliseconds), and then can be divided (for example, the subcarrier spacing is 15 kHZ) into 10 slots (slots). In the new radio technology, the new radio technology further includes subcarrier intervals such as 30khz,60khz,120khz, and the number of time slots that can be divided is 20, 40, and 80, respectively.

In addition, a slot may be divided into Orthogonal Frequency Division Multiplexing (OFDM) symbols (symbols). The 1 slot may include 14 OFDM symbols (when there is a normal Cyclic Prefix (CP)) or 12 OFDM symbols, etc. And it can be known that, when the subcarrier intervals are different, the duration occupied by each OFDM symbol is also different. Specifically, referring to fig. 3B, a schematic diagram of time domain resource division when the subcarrier interval is 15kHZ is provided in the embodiment of the present application.

In the embodiment of the present application, the sounding frame may be set as a frame with a variable duration, and the fixed duration occupied by the sounding information of each node is a time domain position. For example, each node occupies a time domain position of 1 slot. Or the time domain position occupied by each node is 8 OFDM symbols, etc. Then, according to the number of nodes included in the ad hoc network, the number of time domain positions (the number is the same as the number of nodes) included in the probe frame can be determined, and then the total time length of the probe frame can be determined by combining the time length of each time domain position.

Or the sounding frame may be a fixed duration frame. And the duration that the probe information of each node can occupy (i.e., each time domain location) is of variable length. For example, the sounding frame has a length of 1s, and when the total number of nodes included is 1000, the length that each time domain position can occupy is 1s/1000=1ms, whereas when the total number of nodes is 2000, the length that each time domain position can occupy is 1s/2000=0.5ms.

102. And the target node determines a target time domain position in the plurality of time domain positions corresponding to the target node according to the target node number.

After the total time domain positions included in the sounding frame are determined, one of the time domain positions corresponds to a target time domain position of the target node. The corresponding mode of the time domain positions of the plurality of nodes in the ad hoc network system and the node numbers may be a preset corresponding mode, for example, the time domain positions and the node numbers are sequentially combined from front to back according to the sequence of the node numbers; or adjacent combination according to the odd and even node numbers, and the like. After the target node determines the target node number of the target node, the target time domain position corresponding to the target node can be determined. For example, if the preset correspondence mode is that the time domain positions (1 time slot is one time domain position) sequentially correspond to each other from front to back in the order of the node numbers, the target node with the node ID =18 has the corresponding target time domain position of the time slot 17.

103. The target node sends target detection information at a target time domain position to form a detection frame, and the target detection information is used for the target node to detect adjacent nodes in the plurality of nodes.

The target node sends its own detection information, i.e. target detection information, at its corresponding target time domain position. The probe information of each node may be composed of the following two pieces of information: 1. pilot frequency synchronization information; 2. node number of itself.

Specifically, referring to fig. 3C, fig. 3C is a schematic diagram of a probe composition according to an embodiment of the present invention, and as shown in fig. 3C, the pilot synchronization information in the probe may include a Short Training sequence (L-STF) for coarse synchronization and a Long Training sequence (L-LTF) for fine synchronization. The node number, i.e., the node Identification (ID), is also included. Optionally, the node ID field may also include other simple signaling data. Each node sends its own detection information at its corresponding time domain position, so that a complete detection frame can be formed without the need of central node processing. And each piece of detection information in the detection frame is used for detecting adjacent nodes, so that the node discovery process of the ad hoc network is completed.

Thus, optionally, the method further comprises: the target node receives the detection information of other nodes; the target node determines whether other nodes are adjacent nodes of the target node; and the other nodes are nodes except the target node in the ad hoc network system.

Specifically, referring to fig. 3D, fig. 3D is a schematic diagram illustrating a process of using a probe frame for node discovery according to an embodiment of the present disclosure, as shown in fig. 3D, in a probe period, each node sends its probe information at its corresponding time domain position, so as to complete sending of a probe frame. Then, each node receives the detection information in the detection frame (including receiving all the detection frames or only receiving other information except the self detection information in the detection frame), determines whether other nodes are the neighbor nodes of the node (nodes corresponding to the next hop route) according to the detection information, and if so, further completes synchronization with the neighbor nodes.

The method adopted by the embodiment of the application can support the coverage of 1-100 km according to the difference in the design of the pilot frequency synchronous signals. Assuming that the coverage distance is 10KM (kilometer), the frame length is 50us (microseconds), and the unidirectional transmission delay protection is 37us, the detection frame length sent by one terminal is 87us, which is conveniently calculated according to 90us rounding, and the overhead of air interface time slot resources required by the time division sending of the detection frame by 1 thousand terminals is as follows: 1k × 90us =90ms, and if the sounding period is 10s, the sounding overhead only occupies less than 1% of air interface resources.

It can be seen that, in the embodiment of the present application, the time domain position for sending the probe information of each node in the ad hoc network system is divided according to the preset mode, then each node that constructs the ad hoc network system sends its own probe information at its corresponding time domain position, and the probe information of all nodes is assembled into a complete probe frame according to the preset mode. The detection frame is constructed in a time division multiplexing mode and does not include data information of each node, so that the detection frame overhead can be greatly reduced, and the efficiency of the detection frame for detecting adjacent nodes is improved.

In the above embodiment, each node in the ad hoc network system sends the probe information by using a time division multiplexing method. Each node in the ad hoc network system can also adopt a frequency division multiplexing method to send the detection information. Referring to fig. 4A specifically, another signal frame sending method flowchart provided in this embodiment of the present application is applied to a target node, where the target node is one of multiple nodes in an ad hoc network system, and node-related information is allocated to the target node, where the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, and as shown in fig. 4A, the method includes the following steps:

201. and the target node determines a plurality of frequency domain positions corresponding to the detection frames according to the total number of the nodes.

In the embodiment of the present application, the sounding frame is preset as a Frequency Division Multiplexing (FDM) frame. That is, the sounding frame is composed of frequency domain resources for transmitting the sounding information of all target nodes.

Specifically, referring to fig. 4B, fig. 4B is a schematic diagram of a frequency division multiplexing channel provided in the embodiment of the present application, as shown in fig. 4B, a total bandwidth of a transmission channel is divided into a plurality of sub-bands, each sub-band is used for transmitting a different signal, and the signal may correspond to probe information of each node.

Therefore, before the target node sends the sounding information, the frequency domain resource corresponding to each node can be determined. The sounding frame may be set to a variable bandwidth frame, where possible. And the sub-band that the probe information of each node can occupy is a frequency domain position. It is assumed that the bandwidth of the sub-band occupied by each node is 15kHZ, or the bandwidth of the sub-band occupied by each node is 30kHZ, or the like. Then, according to the number of nodes included in the ad hoc network, the number of frequency domain positions (the same as the number of nodes) included in the probe frame can be determined, and then, in combination with the bandwidth of each frequency domain position, the channel bandwidth of the probe frame can be determined.

Or the sounding frame may be a fixed bandwidth frame. The sub-band that each node's sounding information may occupy (i.e., each frequency domain location) is of variable bandwidth. For example, the total bandwidth of the probe frame is 20MHz, in the case that the total number of nodes included is 1200, the length that each time domain position can occupy is 15kHZ, the total transmission bandwidth is 1200 × 15khz =18m, and the remaining 20M-18m =2m, which can be used as a guard bandwidth. And when the total number of the nodes is larger than 1200, the bandwidth that each frequency domain position can occupy will be relatively reduced.

202. And the target node determines a target frequency domain position in the plurality of frequency domain positions corresponding to the target node according to the target node number.

Consistent with the foregoing description, the combination manner of the probe information of the nodes in the ad hoc network system may be a preset combination manner. Sequentially combining from front to back according to the sequence of the node numbers; or adjacent combination according to the odd and even node numbers, and the like. After the target node determines the target node number of the target node, the target frequency domain position corresponding to the target node can be determined. For example, the preset combination mode is to sequentially combine the nodes from front to back according to the order of the node numbers, and the frequency domain position of each node corresponds to one sub-band, then the target node with node ID =18 has a corresponding target frequency domain position of sub-band 18.

203. The target node sends target detection information at a target frequency domain position to form a detection frame, and the target detection information is used for the target node to detect adjacent nodes in the plurality of nodes.

And the target node sends target detection information of the target node at a corresponding target frequency domain position. The probe information of all nodes constitutes a probe frame. The probe information composition can refer to the related description of fig. 3C, and is not described herein again. Each node sends its own detection information at its corresponding frequency domain position, so that a complete detection frame can be formed without the need of central node processing. And each detection information in the detection frame is used for detecting adjacent nodes to finish the node discovery process of the ad hoc network.

Optionally, the method further comprises: the target node receives the detection information of other nodes; the target node determines whether other nodes are adjacent nodes of the target node; and the other nodes are nodes except the target node in the ad hoc network system.

Similarly, each node in the embodiment of the present application may further receive probe information in a probe frame, so as to determine its own neighboring node. And determining whether other nodes are own neighbor nodes (nodes corresponding to the next hop route) according to the detection information, and if so, further completing synchronization with the neighbor nodes.

Therefore, in the embodiment of the application, the frequency domain position for sending the detection information of each node in the ad hoc network system is divided according to the preset mode, and then each node which constructs the ad hoc network system sends the detection information of the node at the corresponding frequency domain position, so that a complete detection frame is formed. The detection frame is constructed in a frequency division multiplexing mode and does not include data information of each node, so that the detection frame overhead can be greatly reduced, and the efficiency of the detection frame for detecting adjacent nodes is improved.

The above embodiments describe the process of sending sounding frames in the FDM manner. In practice, the sounding frame may be sent in a combination of TDM and FDM. Specifically, referring to fig. 5A, another flow chart of a method for sending a signal frame provided in the embodiment of the present application is applied to a target node, where the target node is one of multiple nodes in an ad hoc network system, and node-related information is allocated to the target node, and the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, as shown in fig. 5A, the method includes the following steps:

301. and the target node determines a plurality of time domain positions corresponding to the detection frame and a plurality of frequency domain positions corresponding to each time domain position in the plurality of time domain positions, namely a plurality of time frequency positions.

In the embodiment of the present application, the sounding frame may be preset to be a TDM and FDM frame. That is, the sounding frame is composed of time-frequency resources for transmitting sounding information of all target nodes.

The time-frequency resource refers to a resource formed by combining a specific time domain position and a specific frequency domain position. Specifically, referring to fig. 5B, fig. 5B is a schematic diagram of a time-frequency resource provided in the embodiment of the present application, as shown in fig. 5B, one slot includes 14 OFDM symbols, and a time-frequency resource corresponding to one OFDM symbol and one subcarrier is one RE; the time-frequency resource corresponding to 12 subcarriers of all OFDM symbols included in one slot is one RB. Then, the time-frequency position corresponding to a node set in the embodiment of the present application may refer to one RB, one RE, or may also refer to several REs or several RBs. The embodiments of the present application are not limited. Similarly, the time-frequency position of the node may be a fixed size, for example, N REs, and the size of the probe frame varies according to the total number of nodes. Or the sounding frame may be a fixed size, for example, 100RB, then the size of the time-frequency resource that each node can occupy is determined according to the total number of nodes. For example, when the total number of nodes is 100, the time-frequency position corresponding to each node is 1RB.

302. And the target node determines a target time-frequency position in a plurality of time-frequency positions corresponding to the target node according to the target node number.

Consistent with the foregoing description, the combination manner of the probe information of the nodes in the ad hoc network system may be a preset combination manner. Sequentially combining from front to back according to the sequence of the node numbers; or adjacent combination according to the odd and even node numbers, and the like. After the target node determines the target node number of the target node, the target time-frequency position corresponding to the target node can be determined. However, the difference from the foregoing embodiment is that the time-frequency position in this embodiment is a two-dimensional parameter (including two dimensions of time domain and frequency domain), and the node number is a one-dimensional parameter. The combination of the probe information may be performed according to the correspondence between the time domain position + the frequency domain position and the node number. For example, if the time domain position is the 0 th time slot and the frequency domain is the 0 th subcarrier, the time domain position corresponds to the target time frequency position of the target node whose target node number is 0. And for the case that the combination values of the 0 th time slot + the 1 st subcarrier, and the 1 st time slot + the 0 th subcarrier are the same, it may correspond to the node number according to the preset priority. For example, when the time domain priority is greater than the frequency domain priority, the 0 th time slot + the 1 st subcarrier corresponds to a target time-frequency position of a target node with a target node number of 1, and the 1 st time slot + the 0 th subcarrier corresponds to a target time-frequency position of a target node with a target node number of 2. And so on. It should be noted that the above is only an example of a corresponding manner between a target node number and a target time-frequency position, and should not be taken as a specific limitation. As long as the corresponding mode of the target node number and the target time-frequency position is preset, the target node can determine the target time-frequency position corresponding to the target node according to the target node number of the target node.

303. And the target node sends target detection information at a target time-frequency position to form a detection frame, wherein the target detection information is used for the target node to detect adjacent nodes in the plurality of nodes.

And the target node sends target detection information of the target node at a corresponding target time-frequency position. The probe information of all nodes constitutes a probe frame. The probe information composition can refer to the related description of fig. 3C, and is not described herein again. Each node sends its own detection information at its corresponding time-frequency position, so that a complete detection frame can be formed without the need of central node processing. And each piece of detection information in the detection frame is used for detecting adjacent nodes, so that the node discovery process of the ad hoc network is completed.

Similarly, each node in the embodiment of the present application may also receive probe information in a probe frame, and further determine its own neighboring node. And determining whether other nodes are own neighbor nodes (nodes corresponding to the next hop route) according to the detection information, and if so, further completing synchronization with the neighbor nodes.

Therefore, in the embodiment of the application, the time-frequency position for sending the detection information of each node in the ad hoc network system is divided according to the preset mode, and then each node forming the ad hoc network system sends the detection information of the node at the corresponding time-frequency position to form a complete detection frame. Because the sounding frame is constructed in a mode of combining frequency division multiplexing and frequency division multiplexing, and does not include data information of each node, the expense of the sounding frame can be further reduced, and the efficiency of the sounding frame for sounding adjacent nodes is improved.

Optionally, the ad hoc network system is a half-duplex communication system, the target time domain position includes a first target time slot and a second target time slot, and the sending the target probe information at the target frequency domain position in the multiple frequency domain positions includes: respectively sending target detection information at a first target frequency domain position in a plurality of frequency domain positions of a first target time slot and a second target frequency domain position in a plurality of frequency domain positions of a second target time slot; the method further comprises the following steps: the method comprises the steps of sending the detection information of a first node at other frequency domain positions in a plurality of frequency domain positions of a first target time slot, sending the detection information of a second node at other frequency domain positions in a plurality of frequency domain positions of a second target time slot, wherein the first node and the second node are nodes except a target node in an ad hoc network system, and the first node and the second node are different nodes.

In the embodiment of the present application, a problem to be discussed is that the ad hoc network system is a half-duplex communication system or a full-duplex communication system. When the ad hoc network system is a full-duplex communication system, each node can transmit and receive at the same time, so that the frequency domain multiplexing cannot influence the communication process, and the embodiment can be completely realized. When the ad hoc network system is a half-duplex communication system, the nodes cannot simultaneously transmit and receive at the same frequency. Therefore, special design is required. See table 1 for details:

TABLE 1 time-frequency location of a node transmitting probe information in a half-duplex communication system

1

2

3

4

5

6

1

x1

x2

x3

x4

x5

2

x2

y1

y2

y3

y4

3

x3

y2

z1

z2

z3

4

x4

y3

z2

n1

n2

5

x5

y4

z3

n2

k1

6

x6

y5

z4

n3

k2

NULL

As shown in table 1, assuming that the rows are 1 st to 6 th time domain positions (the same time domain position corresponds to one column of frequency domain positions representing frequency division multiplexing), the columns are 1 st to 6 th frequency domain positions (the same time domain position corresponds to one row of time domain positions representing time division multiplexing), and assuming that x1 represents a target node, target probe information of the target node is sent at the 1 st time domain position (referred to as time domain 1 for short) and the 2 nd time domain position of the 1 st frequency domain position, respectively. That is, the time division multiplexing mode is adopted to stagger the sending and receiving of the detection information of the node which is frequency division multiplexed with x 1. For example, when the node x1 in table 1 transmits probe information at the 1 st frequency domain position (frequency domain 1 for short) and time domain 1, due to the half-duplex communication mode, the information node x1 transmitted by other nodes (including x2, x3, x4, x5, x 6) that also transmit probe information at (time domain 1, frequency domain 1) cannot receive the probe information, and these other nodes cannot receive the probe information transmitted by the node x1 at the time-frequency position. Then other nodes that send probe information at the same time-frequency position as x1 (including x 1) for the first time will send their own probe information again at another time-frequency position, for example, x1 sends again at the position of (time domain 2, frequency domain 1), x2 sends again at the position of (time domain 3, frequency domain 1), x3 sends again at the position of (time domain 4, frequency domain 1), and so on. Therefore, the node which sends the detection information at the first time and the same time frequency position can receive the detection information of other nodes at the time frequency position, and the detection information of the node can be received by other nodes.

In this embodiment, on the basis of the embodiments corresponding to fig. 3A to 3D, a 40M channel bandwidth and a Time Division Duplex (TDD) half-duplex communication mode are assumed, and 6 sub-channels are divided, and each terminal cannot monitor simultaneously when sending a frame, so that the timeslot resources to be detected by a 1-thousand-scale ad hoc network are: 90ms × 2/6=30ms, and the product is 2 because each node actually needs to send the sounding frame 2 times, and division by 6 is multiplexing in the frequency domain, and the final result is 30ms, and when the sounding period is 10s, the overhead of air interface resources is 30ms/10s =0.3%. The full duplex overhead is 0.15%. The detection frame overhead is greatly reduced, and meanwhile, the efficiency of the detection frame for detecting the adjacent nodes is improved.

In the above embodiment, each node in the ad hoc network system sends the probe information by using time division multiplexing, frequency division multiplexing, or a combination of time division multiplexing and frequency division multiplexing. Each node in the ad hoc network system may transmit probe information by using a Code Division Multiplexing (CDM) method.

Code division multiplexing refers to each bit (bit) of each node in an ad hoc network system being transmitted in a set of code sequences. For logical word 1, it is transmitted in the original code sequence, and for logical word 0, it is transmitted in the inverse code of the code sequence. For example, if the code sequence corresponding to the S station is (00011011), the S station transmits a logical word 1, and correspondingly transmits 00011011, but 0 therein is represented by-1, the S occupies the transmitted signal and is actually-1-1-111-111. And when S station transmits logical word 0, corresponding to transmission 11100100, the actual transmitted signal is 111-1-11-1-1. Specifically, referring to fig. 6A, fig. 6A is a schematic diagram of code division multiplexing communication according to an embodiment of the present application, and as shown in fig. 6A, when the S station transmits the symbol bits 110, a corresponding process is shown.

In addition, signals transmitted by different stations can be superposed. After the superposed chips are received, the signal transmitted by each station can be determined according to the multiplication result by multiplying the chips of each station. The method comprises the following specific steps:

s × (Sx + Tx) = X, if X =1, it means that the S station transmits a signal 1, if X = -1, it means that the S station transmits a signal 0, and if X =0, it means that the S station does not transmit a signal. Where S denotes a chip sequence of S station, sx denotes a signal transmitted by S station (denoted by a chip sequence of S station), and Tx denotes a signal transmitted by a station other than S station (denoted by a chip sequence of T station).

It should be noted that, when a plurality of nodes transmit signals by using the CDM scheme, the chip sequences of each node are orthogonal to each other, so as to avoid the influence between the signals.

In the embodiment of the present application, as in the foregoing embodiment, the target node first needs to determine a plurality of chip sequences corresponding to the sounding frame according to the total number of nodes. However, the total number of nodes is different, the possible ways of setting the chip sequences are different, and the number m of codes included in the chip sequences is also different (m =8 in the foregoing example), so that the number of chip sequences can meet the requirements of ad hoc networks of different scales. The information is predetermined before the ad hoc network, and the target node can determine the total number of the chip sequences according to the preset information and the total number of the nodes.

After the total number of the chip sequences is determined by the target node, the chip sequences corresponding to the target node can be determined according to the node numbers of the target node. E.g., the chip sequence corresponds to the node number in the forward direction, then the node of node number 18 corresponds to the 18 th chip sequence. The node determining the chip sequence of itself can transmit the detection information of itself according to the chip sequence to form a complete detection frame. Similarly, each node can receive the probe frame, decode the signal sent by the corresponding node according to the chip sequence of each node, determine whether the node includes its own neighboring node, and then complete the node probing and node synchronization process. The specific process corresponds to the foregoing embodiment, and details are not repeated in the embodiment of the present application.

It can be seen that, in the embodiment of the present application, a chip sequence (codeword) used for sending the detection information of each node in the ad hoc network system is determined according to a preset manner, and then each node that constitutes the ad hoc network system sends its own detection information by using its corresponding codeword, so as to form a complete detection frame. Because the detection frame is established in a code division multiplexing mode and does not comprise data information of each node, the time-frequency resource overhead of the detection frame can be greatly reduced.

However, in the above embodiment, when the ad hoc network system has a large scale, many codewords need to be set, which may cause difficulty in implementation. Based on this consideration, TDM and CDM may be combined, so that different time domain positions correspond to the same codeword, and when the codewords are the same, different air interface resources are distinguished by different time domain positions. Or combining with FDM and CDM, so that different frequency domain positions correspond to the same codeword, and when the codewords are the same, different air interface resources are distinguished by different frequency domain positions. Therefore, the difficulty of setting the code words can be greatly reduced, and low overhead of the air interface resources of the detection frames can be guaranteed.

In a possible implementation, CDM may also be used in combination with TDM and FDM, that is, a plurality of (less than the number of networking nodes) different code words are set, and each code word corresponds to a different time-frequency position of a set. Specifically referring to fig. 6B, fig. 6B is a flowchart of another method for sending a signal frame, which is applied to a target node, where the target node is one of multiple nodes in an ad hoc network system, the target node is assigned with node-related information, and the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, as shown in fig. 6B, the method includes the following steps:

401. and the target node determines a plurality of code words corresponding to the detection frame and a time-frequency position corresponding to each code word according to the total number of the nodes, wherein the code words and the time-frequency position form a first position.

In the embodiment of the present application, the first position is described by using three pieces of parameter information, i.e., (codeword, time domain position, frequency domain position). Specifically, referring to fig. 6C, fig. 6C is a schematic diagram of a first position provided in the embodiment of the present application, as shown in fig. 6C, assuming that 2 OFDM symbols and 12 subcarriers correspond to one time-frequency position, and two time-frequency positions correspond to one codeword, then in the diagram (codeword 1, OFDM symbols 0 to 1, subcarriers 0 to 11) correspond to a first position (OFDM symbols are symbols in a known slot), (codeword 1, OFDM symbols 2 to 3, subcarriers 0 to 11) correspond to a second first position. By analogy, several first locations may be determined. The number of the first positions may be changed according to the total number of the nodes, and the total amount of the resources occupied by the sounding frame may be a fixed amount, so that the size of the first positions is changed according to the total number of the nodes. If the size of the first position is fixed, the total amount of resources occupied by the probe frame is changed according to the total number of the nodes. Both embodiments or other embodiments are possible, and the examples of the present application are not limited.

402. And the target node determines a target first position in the plurality of first positions corresponding to the target node according to the target node number.

After the total amount of the first locations is determined, the target node may determine a target first location corresponding to itself according to its target node number. The correspondence between the node number and the first position may be preset, and for example, the correspondence includes M code words, where the first M1 code words correspond to the first position of the odd node number, and the second M2 code words correspond to the first position of the even node number. And the time-frequency position under the code word corresponding to each node number can be forward corresponding to the time-frequency position according to the node number, that is, the larger the node number is, the more backward the corresponding time-frequency positions are arranged. Or the node number may be made to correspond to the first position in other ways. The specific corresponding mode is preset, so that the target node can accurately determine the target first position of the target node.

403. The target node sends target detection information at a target first position to form a detection frame, and the target detection information is used for the target node to detect adjacent nodes in the plurality of nodes.

And the target node sends the target detection information of the target node at the corresponding target first position. The probe information of all nodes constitutes a probe frame. The probe information composition can refer to the related description of fig. 3C, and is not described herein again. Each node sends its own detection information at its corresponding first position, so that a complete detection frame can be formed without the need of central node processing. And each detection information in the detection frame is used for detecting adjacent nodes to finish the node discovery process of the ad hoc network.

Based on the basic assumptions of the foregoing embodiments 5A-5B, one more dimension of code division is added. If 6 codewords are included, under the condition of half-duplex, the required sounding frame resource is 90ms × 2/6= 5ms, and the overhead of the air interface resource is reduced to 0.05%, under the condition of full-duplex, the required sounding frame resource is 90ms/6 =2.5ms, and the overhead of the air interface resource is reduced to 0.025%, so that the sounding frame overhead is further reduced.

Therefore, in the embodiment of the application, the time-frequency position for sending the detection information of each node in the ad hoc network system is divided according to a preset mode, and a plurality of code words are set, so that each node corresponds to a first position formed by one code word and the time-frequency position. And each node which constructs the ad hoc network system sends the detection information of the node at the corresponding first position to form a complete detection frame. The sounding frame is constructed in a mode of combining frequency division multiplexing, frequency division multiplexing and code division, and data information of each node is not included, so that the overhead of the sounding frame can be reduced to the maximum extent.

Fig. 7 is a signal frame transmitting apparatus 600 according to an embodiment of the present application, which can be used to execute specific embodiments of the signal frame transmitting methods in fig. 3A to 3D, fig. 4A to 4B, fig. 5A to 5B, or fig. 6A to 6C. In a possible implementation manner, as shown in fig. 7, the apparatus 600 for sending signal frames is applied to a target node, where the target node is one of a plurality of nodes in an ad hoc network system, and the target node is assigned with node-related information, where the node-related information includes a total number of nodes in the ad hoc network system and a number of the target node, and the apparatus includes:

a determining unit 601, configured to determine multiple time domain positions corresponding to the sounding frames according to the total number of nodes;

a determining unit 601, configured to determine, according to the target node number, a target time domain position in the multiple time domain positions corresponding to the target node;

a sending unit 602, configured to send target sounding information at a target time domain position to form a sounding frame, where the target sounding information is used by a target node to sound an adjacent node in a plurality of nodes.

Optionally, the target sounding information includes pilot synchronization information, and/or a target node number.

Optionally, the apparatus further comprises:

a receiving unit 603, configured to receive probe information of other nodes;

a determining unit 601, configured to determine whether other nodes are neighboring nodes of the target node; and the other nodes are nodes except the target node in the ad hoc network system.

Optionally, the target time domain position corresponds to a plurality of frequency domain positions, and the sending unit is specifically configured to: target probe information is transmitted at a target frequency domain position of a plurality of frequency domain positions of a target time domain position.

Optionally, the ad hoc network system is a half-duplex communication system, the target time domain position includes a first target time slot and a second target time slot, and the sending unit 602 is specifically configured to: respectively sending target detection information at a first target frequency domain position in a plurality of frequency domain positions of a first target time slot and a second target frequency domain position in a plurality of frequency domain positions of a second target time slot; the sending unit 602 is further configured to: the method comprises the steps of sending the detection information of a first node at other frequency domain positions in a plurality of frequency domain positions of a first target time slot, sending the detection information of a second node at other frequency domain positions in a plurality of frequency domain positions of a second target time slot, wherein the first node and the second node are nodes except a target node in an ad hoc network system, and the first node and the second node are different nodes.

Optionally, the multiple pieces of sounding information in the sounding frame correspond to a target orthogonal code word, where the target orthogonal code word is one of multiple orthogonal code words corresponding to the sounding frame.

Alternatively, the receiving unit 603 and the transmitting unit 602 may be interface circuits or transceivers. For receiving or transmitting data or signaling from other electronic devices.

Alternatively, the determination unit 601 may be a Central Processing Unit (CPU).

Optionally, the signal frame transmitting apparatus 600 may further include a storage unit (not shown in the figure), which may be used for storing data and/or signaling, and the storage unit may be coupled to the receiving unit 603, the transmitting unit 602, and the determining unit 601.

The signal frame transmission apparatus shown in fig. 7 may be implemented in the structure shown in fig. 8, and as shown in fig. 8, the communication apparatus 800 includes at least one processor 801, at least one memory 802, and at least one communication interface 803. The processor 801, the memory 802 and the communication interface 803 are connected through the communication bus and perform communication with each other.

The processor 801 may be a general purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the above schemes.

A communication interface 803 for communicating with other devices or communication Networks, such as ethernet, radio Access Network (RAN), wireless Local Area Networks (WLAN), etc.

The Memory 802 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integrated with the processor.

The memory 802 is used for storing application program codes for executing the above schemes, and is controlled by the processor 801 to execute. The processor 801 is configured to execute application code stored in the memory 802.

The memory 802 stores code that may perform any of the signaling frame transmission methods provided above.

An embodiment of the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program includes, when executed, some or all of the steps of any one of the signal frame transmission methods described in the above method embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art will appreciate that the embodiments described in this specification are presently preferred and that no acts or modules are required by the invention.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a receiving end device, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned memory comprises: various media capable of storing program codes, such as a U disk, a ROM, a RAM, a removable hard disk, a magnetic disk, or an optical disk.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash disk, ROM, RAM, magnetic or optical disk, and the like.

The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A signal frame sending method is characterized in that the method is applied to a target node, the target node is one of a plurality of nodes in an ad hoc network system, node related information is distributed to the target node, and the node related information comprises the total number of the nodes of the ad hoc network system and the number of the target node, and the method comprises the following steps:

determining a target time domain position in the plurality of time domain positions corresponding to the target node according to the target node number;

and sending target detection information at the target time domain position to form the detection frame, wherein the target detection information is used for the target node to detect adjacent nodes in the plurality of nodes.

2. The method according to claim 1, wherein said target sounding information comprises pilot synchronization information, and/or said target node number.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

receiving the detection information of other nodes;

determining whether the other node is a neighbor node of the target node;

wherein the other nodes are nodes in the ad hoc network system except the target node.

4. The method of claim 1, wherein the target time domain location corresponds to a plurality of frequency domain locations, and wherein sending the target sounding information at the target time domain location comprises: and sending the target detection information at a target frequency domain position in a plurality of frequency domain positions of the target time domain position.

5. The method of claim 4, wherein the ad-hoc network system is a half-duplex communication system, wherein the target time domain position comprises a first target time slot and a second target time slot, and wherein the transmitting the target sounding information at a target frequency domain position of the plurality of frequency domain positions comprises:

transmitting the target probe information at a first target frequency domain position of a plurality of frequency domain positions of the first target time slot and at a second target frequency domain position of a plurality of frequency domain positions of the second target time slot, respectively;

the method further comprises the following steps: and sending the detection information of a first node at other frequency domain positions in the plurality of frequency domain positions of the first target time slot, and sending the detection information of a second node at other frequency domain positions in the plurality of frequency domain positions of the second target time slot, wherein the first node and the second node are nodes except the target node in the ad hoc network system, and the first node and the second node are different nodes.

6. The method of claim 1 or 4, wherein the plurality of sounding information in the sounding frame corresponds to a target orthogonal code word, and the target orthogonal code word is one of a plurality of orthogonal code words corresponding to the sounding frame.

7. A signal frame transmitting apparatus, applied to a target node, where the target node is one of a plurality of nodes in an ad hoc network system, and the target node is assigned node-related information, where the node-related information includes the total number of nodes in the ad hoc network system and the number of the target node, the apparatus comprising:

a determining unit, configured to determine multiple time domain positions corresponding to the sounding frames according to the total number of the nodes;

the determining unit is further configured to determine, according to the target node number, a target time domain position in the multiple time domain positions corresponding to the target node;

a sending unit, configured to send target sounding information at the target time domain position to form the sounding frame, where the target sounding information is used by the target node to probe an adjacent node in the multiple nodes.

8. The apparatus according to claim 7, wherein the target sounding information comprises pilot synchronization information, and/or the target node number.

9. The apparatus of claim 7 or 8, further comprising:

a receiving unit, configured to receive probe information of other nodes;

the determining unit is further configured to determine whether the other node is a neighboring node of the target node;

10. The apparatus of claim 7, wherein the target time domain location corresponds to a plurality of frequency domain locations, and wherein the sending unit is specifically configured to: and sending the target detection information at a target frequency domain position in a plurality of frequency domain positions of the target time domain position.

11. The apparatus of claim 10, wherein the ad hoc network system is a half-duplex communication system, the target time domain position comprises a first target time slot and a second target time slot, and the sending unit is specifically configured to:

the sending unit is further configured to: and sending the detection information of a first node at other frequency domain positions in the plurality of frequency domain positions of the first target time slot, and sending the detection information of a second node at other frequency domain positions in the plurality of frequency domain positions of the second target time slot, wherein the first node and the second node are nodes except the target node in the ad hoc network system, and the first node and the second node are different nodes.

12. The apparatus according to claim 7 or 10, wherein the plurality of sounding information in the sounding frame correspond to a target orthogonal code word, and the target orthogonal code word is one of a plurality of orthogonal code words corresponding to the sounding frame.

13. A communication device, wherein the structure of the device comprises a processor and a memory; a processor is coupled to the memory and is operable to execute computer program instructions stored in the memory to cause the apparatus to perform the method of any of claims 1-6.

14. A readable storage medium storing instructions that, when executed, cause the method of any one of claims 1-6 to be implemented.