WO2017054577A1

WO2017054577A1 - Data transmission method and device

Info

Publication number: WO2017054577A1
Application number: PCT/CN2016/094361
Authority: WO
Inventors: 冯媛; 周海军; 李媛媛; 房家奕; 赵丽; 林琳
Original assignee: 电信科学技术研究院
Priority date: 2015-09-30
Filing date: 2016-08-10
Publication date: 2017-04-06
Also published as: TWI640213B; CN106559205A; TW201714482A; CN106559205B

Abstract

Embodiments of the present disclosure disclose a data transmission method and device, configured to address the problem of a low system spectrum utilization rate due to time frequency resource occupation in the existing time slot reservation-based distributed algorithms. The data transmission method comprises: a first node selects, from time frequency resources corresponding to frequency sub-bands available for the first node in time slots allowing frequency multiplexing, a first time frequency resource to be occupied by the first node, and performs data transmission with the first time frequency resource, wherein at least one time frequency resource from the time frequency resources in the time slots allowing frequency multiplexing excluding the time frequency resource occupied by the first node is a second time frequency resource occupied by a second node, and a spatial isolation measure of the first node with respect to each second node in the time slots allowing frequency multiplexing is smaller than or equal to a maximum distance required between nodes having a communication demand. The embodiments of the present disclosure implements frequency multiplexing for at least two nodes having a communication demand by using different time frequency resources in one time slot, thereby improving both the system spectrum utilization rate and the system capacity.

Description

Data transmission method and device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 20151064291, filed on Sep. 30, 2015, which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background technique

The services in the car networking system can be divided into three categories: road safety, traffic efficiency, and infotainment. Among them, the road safety business is the most important and typical business in the car networking system. The basic requirement of this type of service is that each vehicle node needs to reliably receive the safety information sent by other vehicle nodes in the surrounding X meters, where the distance is related to the specific application and the scene.

The road safety service of the Internet of Vehicles system adopts self-organizing network (Ad Hoc), and its slot resource allocation mechanism mainly has two types: one is based on Carrier Sense Multiple Access with Collision Avoidance. The CSMA/CA) mechanism is improved; the other is based on the slot reservation mechanism. One of the more representative ones based on the slot reservation mechanism is the Mobile Slotted Aloha (MS-ALOHA) protocol. It is a Distributed Media Access Control (MAC) protocol based on Dynamic Time Division Multiple Access (TDMA). Each N slots form a frame, each frame. The time slots in the numbers are 1 to N, and are cyclically repeated between frames. It is generally considered that after the vehicle node sends a Frame Information (FI) message on a time slot, it considers that the time slot is a time slot occupied by itself, and the vehicle node broadcasts the FI message on the time slot occupied by itself.

At present, in the distributed algorithm based on time slot reservation, only one vehicle node is allowed to transmit data in each time slot at the same time, that is, Time Division Multiplex (TDM) is adopted between the vehicle nodes, and each vehicle node occupies one sub-segment. frame. This way of allocating the same size time-frequency resources to all packets of different sizes according to the size of a large message will result in low system spectrum utilization and waste of resources when the data packets of the vehicle nodes are small. . And from From the perspective of system capacity, there is a problem that the system capacity is limited.

Summary of the invention

(1) Technical problems to be solved

The embodiments of the present disclosure provide a data transmission method and device for solving a distributed algorithm based on slot reservation, which utilizes time-frequency multiplexing to occupy time-frequency resources, and has low system spectrum utilization and resources. Waste, limited system capacity.

(2) Technical plan

In a first aspect, an embodiment of the present disclosure provides a data transmission method, including:

Determining, by the first node, the first time-frequency resource occupied by the first node, in the time-frequency resource corresponding to the sub-band in which the first node is idle, on the time slot capable of performing frequency division multiplexing, where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of frequency division multiplexing is a second time-frequency resource occupied by the second node, the first node and the The spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements;

The first node performs data transmission on the first time-frequency resource.

In a possible implementation, the first node selects the first node from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. The first time-frequency resources occupied, including:

After determining, by the first node, that the ratio of the occupied time slot to all the time slots is greater than or equal to a set threshold, the first node is idle for the first node from the time slot capable of frequency division multiplexing. In the time-frequency resource corresponding to the frequency band, the first time-frequency resource occupied by the first node is selected.

In a possible implementation, the first node selects the first node from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. The first time-frequency resource occupied also includes:

After the first node determines that the ratio of the occupied time slot to all the time slots is less than the threshold, the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot. Wherein all subbands on the idle time slot are idle for the first node.

In one of the possible embodiments, the first node determines that the frequency division is possible The spatial isolation between all the second nodes on the multiplexed time slots is less than or equal to the maximum distance to be met between nodes having communication requirements, including:

Determining, by the first node, each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing The spatial isolation between them is less than or equal to the maximum distance to be met between nodes with communication requirements; or

Determining, by the first node, the first node and the received power on the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing Capable of performing path loss information between each of the second nodes on a frequency division multiplexed time slot, and determining, between the first node and all of the second nodes, according to the path loss information The spatial isolation is less than or equal to the maximum distance to be met between nodes with communication requirements.

After the first node selects the time-frequency resource occupied by the first node, the method further includes:

After the first node determines that the first node and the second node fail to perform frequency division multiplexing, the first node reselects the first time-frequency resource.

In a possible implementation, the first node determines that the first node and the second node fail to frequency division multiplexing, including:

The notification information sent by the third node, which is sent by the third node, is used to indicate that the first node and the second node fail to perform frequency division multiplexing, and determines that the first node and the second node are frequency-divided. The multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node fail to frequency division multiplexing; or

Determining, by the power measurement, that the first node determines that the first node and the second node are capable of continuing frequency division multiplexing, and the received third node sends the indication The first node determines that the first node and the second node fail to perform frequency division multiplexing, where the third node occupies the The time slot in which the time-frequency resource is located is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.

In one possible embodiment, the first node determines the first node and the first Two-node frequency division multiplexing fails, including:

Determining, by the first node, a second time-frequency resource that is different from a time slot in which the first time-frequency resource is located;

The first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the first node is in the Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, the first node determining the first node and the second node Node frequency division multiplexing failed.

Determining, by the first node, a second time-frequency resource that is different from a time slot in which the first time-frequency resource is located; and

The first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to a set power threshold, where the first node is at the same location The time slot in which the first time-frequency resource is located is the second time-frequency resource of the different time slot, and the information sent by the second node is successfully decoded, and between the first node and the at least one second node. The spatial isolation is greater than a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node fail to frequency division multiplexing.

In a possible implementation, the first node determines that the first node and the second node can continue to perform frequency division multiplexing, including:

If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, and between the first node and all the second nodes The spatial isolation is less than or equal to a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node can continue to frequency division multiplex.

Based on any of the above embodiments, the method further includes:

Receiving, by the first node, information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located;

Determining, by the first node, that the information transmitted by at least one of the at least two nodes that use frequency division multiplexing fails to decode on the other time slot, the first node determining the at least two node frequencies The division multiplexing fails, and transmitting notification information indicating that the arbitrary two nodes fail to frequency division multiplexing is sent to at least one of the at least two nodes.

In a second aspect, a node device provided by the embodiment of the present disclosure includes:

a processing module, configured to select, from a time-frequency resource corresponding to a sub-band in which the first node is idle, in a time slot capable of performing frequency division multiplexing, the first time occupied by the first node to which the processing module belongs a frequency resource, where the at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is a second time-frequency resource occupied by the second node, The spatial isolation between the first node and all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;

And a transceiver module, configured to perform data transmission on the first time-frequency resource.

In one of the possible embodiments, the processing module is specifically configured to:

After determining that the ratio of the occupied time slot to all time slots is greater than or equal to a set threshold, the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources, the first time-frequency resource occupied by the first node is selected.

In one of the possible embodiments, the processing module is further configured to:

After determining that the ratio of the occupied time slot to all the time slots is less than the threshold, the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.

In one of the possible embodiments, the processing module determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the inter-node requirement with communication requirements. The maximum distance that is met, including:

Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements; or

Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing, that the first node is capable of performing frequency division Path loss information between each of the second nodes on the used time slot, and determining according to the path loss information The spatial isolation between the first node and all of the second nodes is less than or equal to the maximum distance to be met between nodes having communication requirements.

Based on any of the above embodiments, the processing module is further configured to:

After determining that the first node and the second node fail to frequency division multiplexing, the first time-frequency resource is reselected.

Determining, by the third node, the notification information that is sent by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing, determining that the first node and the second node are frequency-divided The multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node can continue to perform frequency division multiplexing, and the third node that is sent by the transceiver module is used to indicate the first Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located The time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.

Determining a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located; and

Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.

Detecting that the time slot in which the first time-frequency resource is located is on a second time-frequency resource with a different time slot The received power is greater than or equal to the set power threshold, and the information sent by the second node is successfully decoded on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located, and the information is successfully The spatial isolation between the first node and the at least one of the second nodes is greater than the maximum distance to be met between the nodes having communication requirements, and determining that the first node and the second node fail to frequency division multiplexing.

If the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located The information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement. The maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.

The transceiver module is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located;

The processing module is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing fails to decode on the other time slots, determine that the at least two nodes are frequency-replicated Using the failure, and controlling the transceiver module to send notification information indicating that the arbitrary two nodes fail to frequency division multiplexing to at least one of the at least two nodes.

Another node device provided by the embodiment of the present disclosure includes: a transceiver, and at least one processor connected to the transceiver, wherein:

The processor is configured to read a program in the memory and perform the following process:

Selecting, from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time-frequency resources corresponding to the sub-bands in which the first node is idle, the first time-frequency resource occupied by the first node where the node device is located, where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of performing frequency division multiplexing is a second time-frequency resource occupied by the second node, where the first node and the first node The spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;

The transceiver is configured to perform data transmission on the first time-frequency resource under the control of the processor.

In one of the possible embodiments, the processor is specifically configured to:

In one of the possible embodiments, the processor is further configured to:

In one possible embodiment, the processor determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the inter-node requirement with communication requirements. The maximum distance that is met, including:

Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing, that the first node is capable of performing frequency division The path loss information between each of the second nodes on the used time slot, and determining, according to the path loss information, that the spatial isolation between the first node and all the second nodes is less than Or equal to the maximum distance to be met between nodes with communication needs.

Based on any of the above embodiments, the processor is further configured to:

Determining, by the transceiver, the notification information that is sent by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing, determining that the first node and the second node are frequency-divided The multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines the first node and the second node The frequency division multiplexing can be continued, and the notification information sent by the third node, which is sent by the third node, is used to indicate that the first node and the second node fail to be frequency division multiplexed, and the first node is determined to be The second node fails to perform frequency division multiplexing, where the time slot in which the third time-frequency resource occupied by the third node is located and the time slot in which the first time-frequency resource is located and the second time-frequency resource are located The time slots are different.

Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource of different time slots, and the spatial isolation between the first node and the at least one second node is greater than that between the nodes having communication requirements. Determining the maximum distance to be met, determining that the first node and the second node fail to frequency division multiplexing.

The transceiver is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located, according to any of the foregoing embodiments;

The processor is further configured to: determine that at least two pairs of frequency division multiplexing are used on the other time slots After the information sent by the at least one of the nodes fails to be decoded, determining that the at least two nodes fail to frequency division multiplexing, and controlling the transceiver module to send to the at least one of the at least two nodes The notification information of frequency division multiplexing failure of any two nodes is described.

(3) Beneficial effects

At least one of the above technical solutions of the specific embodiments of the present disclosure has the following beneficial effects:

In the method and device provided by the embodiment of the present disclosure, the first node selects the first time from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. a first time-frequency resource occupied by the node, and performing data transmission on the first time-frequency resource, where the time-frequency resource occupied by the first node is removed from the time slot capable of frequency division multiplexing The at least one time-frequency resource is a second time-frequency resource occupied by the second node, and at least one time slot in which the first time-frequency resource is located and a time slot in which all second time-frequency resources occupied by the second node are located For different time slots, the spatial isolation between the first node and all of the second nodes is less than or equal to the maximum distance to be met between nodes having communication requirements. Therefore, frequency division multiplexing of different time-frequency resources in the same time slot between at least two nodes having communication requirements is realized, thereby improving system spectrum utilization and improving system capacity.

DRAWINGS

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present disclosure. Some embodiments of the text may also be used to obtain other figures from these figures without departing from the art.

FIG. 1 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present disclosure;

2 is a schematic diagram of a node device according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another node device according to an embodiment of the present disclosure.

detailed description

The specific embodiments of the present disclosure are further described below in conjunction with the accompanying drawings and embodiments. The following examples are only intended to illustrate the disclosure, but are not intended to limit the scope of the disclosure.

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will be combined The technical solutions of the embodiments of the present disclosure are clearly and completely described in the drawings of the embodiments of the present disclosure. It is apparent that the described embodiments are part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure are within the scope of the disclosure.

Unless otherwise defined, technical terms or scientific terms used herein shall be taken to mean the ordinary meaning of the ordinary skill in the art to which this disclosure belongs. The words "first", "second" and similar terms used in the specification and claims of the present disclosure do not denote any order, quantity or importance, but are merely used to distinguish different components. Similarly, the words "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is also changed accordingly.

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in the following description.

At present, the distributed algorithm scheme based on slot reservation uses Time Division Multiple Access (TDMA). Specifically, each vehicle node occupies one subframe separately. When the data packet of the vehicle node is small, the resource is wasted, and the system capacity is more limited. Therefore, Frequency Division Multiple Access (FDMA) needs to be considered, that is, multiple users use frequency division multiplexing resources, each user only occupies a part of bandwidth, improves resource utilization, and improves system capacity. However, there is a need to solve the problem of in-band leakage: when multiple vehicles simultaneously transmit signals, if a certain vehicle has communication needs with the multiple vehicles, it is necessary to simultaneously receive signals from different vehicles. Due to the influence of in-band emission, one user's data may interfere with signals of other users in adjacent frequency resources. When the power difference of the signal is greater than a certain value, the small signal is overwhelmed by the large signal. At this time, the receiving vehicle cannot correctly decode the transmission signals of all frequency divisions, resulting in the problem that some surrounding vehicles lose safety messages, and there is a safety hazard.

The embodiment of the present disclosure occupies time-frequency resources by introducing frequency division multiplexing in a distributed algorithm based on slot reservation, so that at least two nodes with communication requirements can be frequency-multiplexed with the same time slot. Different time-frequency resources on the above, thus solving the existing distributed algorithm based on time slot reservation, Due to the use of time-division multiplexing to occupy time-frequency resources, there are technical problems such as low system spectrum utilization, waste of resources, and limited system capacity.

In order to explain the technical solution of the present disclosure, the words "first node", "second node", "third node" and the like are used to distinguish nodes in different vehicle networking systems, but the number of nodes is not Operation priority is limited. For example, the first node represents any node in the car network system, the second node represents a node that is frequency-multiplexed with the first node in the same time slot, and the third node represents that the first node and the second node are not frequency-division multiplexed. Node. The number of second nodes may be one or two or more. The number of third nodes may be one or two or more. Embodiments of the present disclosure do not limit the number of third nodes.

In order to explain the technical solution of the present disclosure, the words "first time-frequency resource" and "second time-frequency resource" are used to distinguish different time-frequency resources, but the number of time-frequency resources and the operation priority are not used. Make restrictions. For example, the first time-frequency resource represents a time-frequency resource occupied by the first node, and the second time-frequency resource represents a time-frequency resource occupied by the second node.

In the embodiment of the present disclosure, the manner in which the nodes (including the first node, the second node, and the third node) transmit data is configured by the system, as follows:

For data that needs to be transmitted, the node adopts the method of initial transmission + retransmission. The number of retransmissions may be one time, or may be two or more times.

In this mode, the time-frequency resources used for initial transmission and retransmission of each node may adopt a fixed transmission pattern, that is, the location of the time-frequency resource used for initial transmission and retransmission of the node is associated, as long as it is known. Any time-frequency resource occupied by the node can know the location of other time-frequency resources occupied by the node. For example, the system pre-configures the transmission pattern of the time-frequency resource used for initial transmission and retransmission of each node, that is, after determining the time-frequency resource used for the initial transmission, the transmission pattern of the time-frequency resource used according to the initial transmission and the retransmission, It is possible to determine the time-frequency resources used for retransmission. The time-frequency resources used for the initial transmission and retransmission of each node may also have no transmission pattern, that is, the positions of the time-frequency resources used for initial transmission and retransmission of the nodes are independent.

In this manner, the number of first time-frequency resources is two or more, and the number of second time-frequency resources is two or more.

The embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure this.

The embodiment of the present disclosure provides a data transmission method. As shown in FIG. 1, the method includes:

In step S11, the first node selects the first time-frequency resource occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time slot that is capable of frequency division multiplexing. The at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is the second time-frequency resource occupied by the second node, where the first node The spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements;

Step S12: The first node performs data transmission on the first time-frequency resource.

Here, the spatial isolation mentioned refers to the geographical isolation, that is, the spatial distance between two nodes.

In the embodiment of the present disclosure, the first node selects the first occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle from the time slot capable of frequency division multiplexing. Time-frequency resources, and data transmission on the first time-frequency resource. The at least one time-frequency resource except the time-frequency resource occupied by the first node on the time slot capable of frequency division multiplexing is a second time-frequency resource occupied by the second node, at least one of the foregoing The time slot in which the time-frequency resource is located and the time slot in which all the second time-frequency resources occupied by the second node are located are different time slots, and the spatial isolation between the first node and all the second nodes Both are less than or equal to the maximum distance to be met between nodes with communication needs. Therefore, frequency division multiplexing of different time-frequency resources in the same time slot between at least two nodes having communication requirements is realized, thereby improving system spectrum utilization and improving system capacity.

It should be noted that we generally think that there is a communication requirement between nodes satisfying the set distance requirement, and it is possible to determine whether there is a communication requirement between the nodes by the distance between the nodes. Specifically, the set distance to be satisfied between nodes having communication requirements may be a distance between specific geographical locations, for example, communication between two nodes having a distance less than 100 meters. In addition, the set distance that needs to be satisfied between nodes having communication requirements may also be spatial isolation. For example, there is communication requirement between two nodes that are one-hop nodes. The two nodes (the first node and the second node) performing frequency division multiplexing in the embodiment of the present disclosure have communication requirements, and therefore, two nodes performing frequency division multiplexing (the first node and the second node) The spatial isolation between nodes must satisfy the frequency division multiplexing condition, ie The spatial isolation between the two nodes (the first node and the second node) performing frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements.

For example, in the embodiment of the present disclosure, the frequency division multiplexing manner between the first node and the second node is a partial frequency division manner. That is, the first node occupies at least one first time-frequency resource in the first time slot resource, and the time slot in which the first time slot is located and the time slot in which all second time-frequency resources occupied by the second node are located are Different time slots.

For example, the first node and the second node both transmit data in an initial transmission and a retransmission manner, and the first node first transmits and retransmits the time slot in which at least one of the first time-frequency resources occupied by the first time-frequency resource is located. The time slot in which the second time-frequency resource occupied by the initial transmission and retransmission of the second node is located is a different time slot.

In the embodiment of the present disclosure, the first node preferentially selects the time-frequency resource on the idle time slot as the first time-frequency resource occupied by the first time slot, and selects the frequency-division multiplexing mode after the time slot occupancy rate reaches the set threshold. The first time-frequency resource occupied by itself. Correspondingly, the first node in the step S11 selects the first occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle from the time slot capable of frequency division multiplexing. One-time frequency resources, including:

As another implementation manner, in the step S11, the first node selects the first time from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. The first time-frequency resource occupied by the node further includes: after determining, by the first node, that the ratio of the occupied time slot to all time slots is less than the threshold, selecting, from the time-frequency resource corresponding to the idle time slot, The time-frequency resource occupied by the first node is out, wherein all sub-bands on the idle time slot are idle for the first node.

In the embodiment of the present disclosure, the first node preferentially selects the time-frequency resource occupied by the first node from the time-frequency resources corresponding to the idle time slot, and the ratio of the occupied time slot to all the time slots. After being greater than or equal to the set threshold, the first time occupied by the first node is selected from the time-frequency resources corresponding to the sub-bands in which the first node is idle on the time slot capable of frequency division multiplexing. Time-frequency resources.

In the embodiment of the present disclosure, the first node and the second node adopt a frequency division multiplexing side. When the time-frequency resources of the same time slot are occupied, the spatial isolation between the first node and all the second nodes on the same time slot is less than or equal to the maximum distance to be met between nodes having communication requirements. That is, as long as the spatial isolation between the at least one second node on the same time slot and the first node is greater than the maximum distance to be met between nodes having communication requirements, the first node cannot The same time slot is multiplexed. Therefore, the first node needs to determine the spatial isolation between itself and each second node in the time slot capable of frequency division multiplexing before selecting the first time-frequency resource occupied by the first node. Less than or equal to the maximum distance to be met between nodes with communication needs.

Determining, by the first node, that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements, including the following Two ways:

1. The first node determines, according to location information of each second node on a time slot capable of frequency division multiplexing, each of the first node and a time slot capable of frequency division multiplexing. The spatial isolation between the two nodes is less than or equal to the maximum distance that needs to be met between nodes with communication requirements.

Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node can perform frequency division multiplexing, determining that the first node is capable of performing frequency Separating the path loss information between each of the second nodes on the multiplexed time slot, and determining the spatial isolation between the first node and all of the second nodes according to the path loss information Both are less than or equal to the maximum distance to be met between nodes with communication needs.

In this manner, the first node first determines path loss information between the first node and each of the second nodes according to received power, and then according to the first node and each of the second nodes. The path loss information between the first node determines the spatial isolation between the first node and each of the second nodes, so that it can be determined whether the frequency division multiplexing condition is satisfied.

Optionally, in order to reduce the time slot adjustment rate, the first node may further perform frequency division multiplexing by combining the vehicle speed information/lane information of the vehicle to which the first node belongs. Specifically:

The lane in which the vehicle to which the first node belongs is the same lane as the lane in which all the vehicles to which the second node belongs; and/or the current vehicle speed of the vehicle to which the first node belongs is greater than or equal to all the first The current vehicle speed of the vehicle to which the two nodes belong.

In an implementation, the first node determines that the first node and the second node fail to perform frequency division multiplexing, and includes the following three implementation manners:

The mode A determines that the first node and the second node fail to frequency division multiplexing by measuring the received power on the second time-frequency resource.

The method further includes the following two implementations:

In the mode A1, the first node determines a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located. If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the first node is Decoding the information sent by the second node with the second time-frequency resource in which the time slot in which the first time-frequency resource is located is a different time slot, the first node determining the first node and the first node Two-node frequency division multiplexing failed.

For example, the first node first detects the received power through the bottom layer to determine whether there is a second node that is frequency-multiplexed with the first node in the same time slot, and detects that the first time-frequency resource is located. The received power on the second time-frequency resource with the time slot being different time slots is greater than or equal to the set second power threshold, and determining that there is a second node that is frequency-multiplexed with the first node in the same time slot.

After determining, by the first node, that there is a second node that is frequency-multiplexed with the first node in the same time slot, and then adopting a second time slot that is different from the time slot in which the first time-frequency resource is located Whether the decoding can be successful on the time-frequency resource determines whether the frequency division multiplexing is successful. If the first node can successfully decode the information sent by the second node on the second time-frequency resource with the time slot in which the first time-frequency resource is located, the first node determines the The frequency division multiplexing of the first node and the second node fails.

The mode A2: the first node determines a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located. If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, between the first node and the at least one second node The spatial isolation is greater than the maximum distance to be met between nodes having communication requirements, the first The node determines that the first node and the second node fail to frequency division multiplex.

In a mode B, determining, by the third node that does not frequency-multiplex the same time slot with the first node and the second node, whether the first node and the second node fail to perform frequency division multiplexing, specifically :

Determining, by the first node, the first node and the second node according to the received notification information that is used by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing The sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.

In this manner, the third node receives information sent by the first node and the second node on the other time slots on other time slots than the time slot in which the time-frequency resource occupied by the third time zone is located.

Determining, by the third node, information that is sent by the first node and/or the second node, determining that the first node and the second node fail to perform frequency division multiplexing, and to the first The node and/or the second node send notification information indicating that the first node and the second node fail to frequency division multiplexing.

Method C, the mode is the combination of the foregoing mode A and mode B, specifically:

In this manner, the first node determines that the first node and the second node can continue to perform frequency division multiplexing, including:

Based on any of the above embodiments, the first node also acts as a third party node to determine other sections. Whether the frequency division multiplexing of the points is successful. details as follows:

The first node receives information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.

Determining, by the first node, that the information transmitted by at least one of the at least two nodes that use frequency division multiplexing fails to decode on the other time slot, the first node determining the at least two node frequencies The division multiplexing fails, and transmitting notification information indicating that the at least two nodes fail to frequency division multiplexing are sent to at least one of the at least two nodes.

Embodiments of the present disclosure also provide principles for a node to transmit an FI message and maintain a slot state table (vector) in a frequency division multiplexing manner.

The frame information (FI) sent by the node is called FI message, and may also be simply referred to as FI. The status information corresponding to each time slot indicated in the FI message is referred to as a time slot information field corresponding to each time slot in the FI message. The three types of information given in the occupation status information corresponding to each time slot in the FI message are: time slot occupation status, resource temporary identifier (STI), and priority information. Their corresponding sub-domains are respectively called: the slot occupancy status sub-field, the STI sub-domain, and the priority sub-field included in the slot information field of each slot.

When the FI message is sent, usually when the system is uncertain of the absolute time reference point, the first slot information field in the FI message indicates the slot information corresponding to the transmission slot of the FI message, and the second slot information field indicates FI. The slot information corresponding to the previous slot of the transmission slot of the message, and so on. When the system determines the absolute time reference point, the information fields of each slot in the FI message may be arranged in an agreed manner. For example, the first slot information field in the FI message corresponds to slot 0.

The "detection domain" corresponding to the time slot refers to the slot information field corresponding to the time slot in the FI message sent in the time slot, and the "non-detection domain" refers to the time slot corresponding to the time slot in the FI that is not occupied by the time slot. Time slot information field.

It should be noted that the above description manner is only for the convenience of subsequent description, and other description manners may be used.

The following is an example of any node in the car network system (ie, the first node).

1. The process in which the first node sends an FI message.

The content of the FI message is expressed in units of the slot number of the primary time-frequency resource occupied by the first node or the time slot resource set composed of the first time-frequency resource occupied by the first node. The symbol is characterized by using the number of the first slot resource occupied by the initial transmission in the set of time slot resources. The primary time-frequency resource occupied by the first node is any first time-frequency resource occupied by the first node, and the secondary time-frequency resource occupied by the first node is when the first node occupies the first time. The first time-frequency resource other than the any first time-frequency resource in the frequency resource.

Transmission of the FI message: The FI message is sent on any of the first time-frequency resources occupied by the first node.

If they are related to each other, that is, the first time-frequency resource occupied by the initial transmission and the first time-frequency resource occupied by the retransmission are in a fixed pattern, the location of the first node is determined, and the FI information sensed by the first node is determined. It is also ok so that the FI message can carry only one. That is, although the service message is sent on all the first time-frequency resources, the FI message can be sent only on one of the first time-frequency resources, and the other first time-frequency resource is sent on the pure-time data.

Second, the maintenance of the slot state table (vector) of the first node.

The first node performs mapping according to the received FI message sent by other nodes, and obtains a slot state table (vector) that is currently maintained by itself, and each slot state table (vector) maintains slot information corresponding to all slots. . The first node maps the received FI message to a real time slot and records it to obtain a slot state table (vector) that is currently maintained by itself. When the first node needs to send the FI message, it maps according to the slot state table (vector) currently maintained by itself, and obtains the FI message to be sent. When the first node sends an FI message. The mapping may be performed in units of time-frequency resources, or may be mapped in units of time-frequency resources.

For the initial/retransmission combined reception principle: for the initial/retransmission of other nodes, the first node arbitrarily receives once, then it determines that it successfully receives the data transmitted by other nodes (the combining gain can be further considered), that is, no special processing is required. If the response is successful, the feedback is successful, whether it is successfully received in the time slot of the initial transmission (such as the primary time-frequency resource) or received in the time slot of the retransmission (such as the secondary time-frequency resource).

A data transmission method provided by an embodiment of the present disclosure will be described below through three specific embodiments.

Embodiment 1: It is assumed that each node is retransmitted once, that is, the transmission of each node includes one initial transmission and one retransmission. The pre-configured initial/retransmission time-frequency resource pairs are as shown in Table 1. X1 represents an initial/retransmission time-frequency resource pair, and X2 represents an initial/retransmission time-frequency resource pair.

Table 1

	时隙1Time slot 1	时隙2Time slot 2	时隙3Time slot 3	时隙4Time slot 4	时隙5Time slot 5
子频带1Subband 1	节点ANode A	节点ANode A	X1X1	X1X1	XX
子频带2Subband 2	节点BNode B	X2X2	节点BNode B	X2X2	XX
子频带3Subband 3	XX	XX	XX	XX	XX

In the table, X represents an idle time-frequency resource, and there are X1 and X2 two initial/retransmission time-frequency resource pairs in the idle time-frequency resource, which all indicate a determined time-frequency resource pair.

When the time-frequency resource is occupied by the node C, if the time slot occupancy rate is less than the set threshold, the time-frequency resources in the idle time slot are preferentially occupied. If the time slot occupancy rate is greater than or equal to the set threshold, the frequency division multiplexing mode is used to occupy the time-frequency resources, as follows:

For the X1 time-frequency resource pair, the node C needs to determine the distance between the node B and itself; for the X2 time-frequency resource pair, the node C needs to determine the distance between the node A and itself.

Assume that the spatial isolation between node C and node A is less than or equal to the maximum distance to be met between nodes with communication requirements, and the spatial isolation between node B and node B is greater than the maximum distance to be met between nodes with communication requirements. Node C considers frequency division multiplexing with node A to select the X2 time-frequency resource pair.

Embodiment 2: Principle of combined reception for initial/retransmission (including frequency division multiplexed nodes and other nodes).

For the two nodes that have been frequency-division multiplexed, the time-frequency resources occupied by node A and node B are shown in Table 2.

Table 2

	时隙1Time slot 1	时隙2Time slot 2	时隙3Time slot 3	时隙4Time slot 4	时隙5Time slot 5
子频带1Subband 1	节点ANode A	节点ANode A	X1X1	X1X1	XX
子频带2Subband 2	节点BNode B	X2X2	节点BNode B	X2X2	XX
子频带3Subband 3	节点CNode C	XX	XX	XX	节点CNode C

(1) Nodes A, B, and C are frequency-multiplexed into the same time slot (i.e., time slot 1), with node A and node B as transmitting nodes, and node C as a receiving node. Node C receives the decision whether to receive correctly.

The node C determines, by the underlying measurement, that the node A and the node B that are frequency-multiplexed with themselves are present, and further determines the time slots corresponding to the two time-frequency resources occupied by the node A and the node B.

For node A, since it is frequency-divided with node C on slot 1, information of node A can only be received on slot 2, that is, node C and node A are partial frequency division nodes.

For Node B, since it is frequency-divided with Node C on Time Slot 1, the information of Node B can only be received on Time Slot 3, that is, Node C and Node B are partial frequency division nodes.

Here, the reception of the node B by the node C will be described as an example. Specifically, as shown in Table 3:

table 3

(2) The reception of the information of the node D for the node A and the node C, that is, the node D and the node A and the node C are non-frequency division nodes. Node A and Node C are similar. Here, node A is taken as an example to illustrate:

Node D needs to determine whether node A: 1) has a frequency division failure; 2) whether a spatial multiplexing collision has occurred.

The determination of the failure of the two types of time slots is consistent with the decision principle of the partial frequency division node in (1). The difference is that the reception of the node A by the node D has multiple opportunities, and the result needs to be combined.

The above method processing flow can be implemented by a software program, which can be stored in the storage medium. In the quality, when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, a node device is further provided in the embodiment of the present disclosure. Since the principle of the node device solving the problem is similar to the foregoing data transmission method, the implementation of the node device may refer to the implementation of the method, and the repetition is not Let me repeat.

A node device provided by the embodiment of the present disclosure, as shown in FIG. 2, the device includes:

The processing module 21 is configured to select, from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time slot capable of frequency division multiplexing, the first occupied by the first node to which the processing module belongs a time-frequency resource, wherein at least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of performing frequency division multiplexing is a second time-frequency resource occupied by the second node, where The spatial isolation between the first node and all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;

The transceiver module 22 is configured to perform data transmission on the first time-frequency resource.

Optionally, the processing module 21 is specifically configured to:

Optionally, the processing module 21 is further configured to:

Optionally, the processing module 21 determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements. ,include:

Based on any of the above embodiments, the processing module 21 is further configured to:

Optionally, the processing module 21 is specifically configured to:

Determining, by the third node, the notification information that is sent by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing, determining the first node and the second node frequency The sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node are capable of continuing frequency division multiplexing, and the third node that is received by the transceiver module 22 is configured to indicate the Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located The time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.

As an optional implementation, the processing module 21 is specifically configured to:

Determining a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located;

As an alternative implementation, the processing module 21 is specifically configured to:

Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource of different time slots, and the A spatial isolation between a node and at least one of the second nodes is greater than a maximum distance to be met between nodes having communication requirements, and determining that the first node and the second node fail to frequency division multiplexing.

Optionally, the processing module 21 is specifically configured to:

Based on any of the foregoing embodiments, the transceiver module 22 is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.

Based on any of the foregoing embodiments, the processing module 21 is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing is failed to be decoded on the other time slots, determine The at least two nodes fail to perform frequency division multiplexing, and control the transceiver module to send, to the at least one of the at least two nodes, notification information indicating that the any two nodes fail to frequency division multiplexing.

The structure and processing manner of the node device provided by the embodiment of the present disclosure will be described below in conjunction with the preferred hardware structure.

In the embodiment of FIG. 3, the node device includes a transceiver 31, and at least one processor 32 coupled to the transceiver 31, wherein:

The processor 32 is configured to read a program in the memory 33 and perform the following process:

Determining, by the time-frequency resource corresponding to the sub-band in which the first node is idle, the first time-frequency resource occupied by the first node to which the processing module belongs, where The at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is the second time-frequency resource occupied by the second node, where the first node and the The spatial isolation between all of the second nodes on a time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;

The transceiver 31 is configured to perform data transmission on the first time-frequency resource under the control of the processor 32.

Here, in FIG. 3, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 32 and various circuits of memory represented by memory 33. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 31 may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 34 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 32 is responsible for managing the bus architecture and general processing, and the memory 33 can store data used by the processor 32 when performing operations.

Optionally, the processor 32 is specifically configured to:

Optionally, the processor 32 is further configured to:

Optionally, the processor 32 determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements. ,include:

Based on any of the above embodiments, the processor 32 is further configured to:

Optionally, the processor 32 is specifically configured to:

Determining, by the third node, the notification information sent by the third node, indicating that the first node and the second node fail to perform frequency division multiplexing, determining the first node and the second node frequency The sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node can continue to perform frequency division multiplexing, and the third node that is received by the transceiver 31 is used to indicate the Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located The time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.

As an optional implementation, the processor 32 is specifically configured to:

As another alternative implementation, the processor 32 is specifically configured to:

Optionally, the processor 32 is specifically configured to:

Based on any of the foregoing embodiments, the transceiver 31 is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.

Based on any of the foregoing embodiments, the processor 32 is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing is failed to be decoded on the other time slot, determine The at least two nodes fail to perform frequency division multiplexing, and control the transceiver module to send, to the at least one of the at least two nodes, notification information indicating that the any two nodes fail to frequency division multiplexing.

Those skilled in the art will appreciate that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

These computer program instructions can also be stored in a bootable computer or other programmable data processing device. In a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising an instruction device implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present disclosure has been described, it will be apparent to those skilled in Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the disclosure. Thus, the present disclosure is intended to cover such modifications and variations as the modifications and variations of the present invention are intended to be included.

Claims

A data transmission method includes:

Determining, by the first node, the first time-frequency resource occupied by the first node, in the time-frequency resource corresponding to the sub-band in which the first node is idle, on the time slot capable of performing frequency division multiplexing, where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of frequency division multiplexing is a second time-frequency resource occupied by the second node, the first node and the The spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements;

The first node performs data transmission on the first time-frequency resource.
The method according to claim 1, wherein said first node selects said first time from a time-frequency resource corresponding to a sub-band in which said first node is idle from a time slot capable of frequency division multiplexing The first time-frequency resource occupied by a node includes:

After determining, by the first node, that the ratio of the occupied time slot to all the time slots is greater than or equal to a set threshold, the first node is idle for the first node from the time slot capable of frequency division multiplexing. In the time-frequency resource corresponding to the frequency band, the first time-frequency resource occupied by the first node is selected.
The method according to claim 2, wherein the first node selects a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. The first time-frequency resource occupied by the first node further includes:

After the first node determines that the ratio of the occupied time slot to all the time slots is less than the threshold, the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot. Wherein all subbands on the idle time slot are idle for the first node.
The method of claim 1, wherein the first node determines that spatial isolation between all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to communication requirements The maximum distance to be met between the nodes, including:

Determining, by the first node, each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing The spatial isolation between them is less than or equal to the maximum distance to be met between nodes with communication requirements; or

The first node is configured according to each of the first nodes on a time slot capable of frequency division multiplexing Determining, by the second node, the received power on the second time-frequency resource occupied by the second node, and determining path loss information between the first node and each of the second nodes on the time slot capable of frequency division multiplexing, and And determining, according to the path loss information, that the spatial isolation between the first node and all the second nodes is less than or equal to a maximum distance to be met between nodes having communication requirements.
The method according to any one of claims 1 to 4, wherein after the first node selects a time-frequency resource occupied by the first node, the method further includes:

After the first node determines that the first node and the second node fail to perform frequency division multiplexing, the first node reselects the first time-frequency resource.
The method of claim 5, wherein the first node determines that the first node and the second node fail to frequency division multiplex, including:

The notification information sent by the third node, which is sent by the third node, is used to indicate that the first node and the second node fail to perform frequency division multiplexing, and determines that the first node and the second node are frequency-divided. The multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node fail to frequency division multiplexing; or

Determining, by the power measurement, that the first node determines that the first node and the second node are capable of continuing frequency division multiplexing, and the received third node sends the indication The first node determines that the first node and the second node fail to perform frequency division multiplexing, where the third node occupies the The time slot in which the time-frequency resource is located is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
The method of claim 6, wherein the first node determines that the first node and the second node fail to frequency division multiplex, including:

Determining, by the first node, a second time-frequency resource that is different from a time slot in which the first time-frequency resource is located; and

The first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the first node is in the The time slot in which the first time-frequency resource is located is sent to the second node on the second time-frequency resource of different time slots. The decoded information fails to be decoded, and the first node determines that the first node and the second node fail to frequency division multiplexing.
The method of claim 6, wherein the first node determines that the first node and the second node fail to frequency division multiplex, including:

Determining, by the first node, a second time-frequency resource that is different from a time slot in which the first time-frequency resource is located; and

The first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to a set power threshold, where the first node is at the same location The time slot in which the first time-frequency resource is located is the second time-frequency resource of the different time slot, and the information sent by the second node is successfully decoded, and between the first node and the at least one second node. The spatial isolation is greater than a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node fail to frequency division multiplexing.
The method of claim 6, wherein the first node determines that the first node and the second node are capable of continuing frequency division multiplexing, including:

If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, and between the first node and all the second nodes The spatial isolation is less than or equal to a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node can continue to frequency division multiplex.
The method of any of claims 1 to 9, further comprising:

Receiving, by the first node, information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located;

Determining, by the first node, that the information transmitted by at least one of the at least two nodes that use frequency division multiplexing fails to decode on the other time slot, the first node determining the at least two node frequencies The division multiplexing fails, and transmitting notification information indicating that the arbitrary two nodes fail to frequency division multiplexing is sent to at least one of the at least two nodes.
A node device, comprising:

a processing module, configured to be idle for the first node from a time slot capable of frequency division multiplexing In the time-frequency resource corresponding to the sub-band, the first time-frequency resource occupied by the first node to which the processing module belongs is selected, wherein the time-division multiplexed time slot is occupied by the first node. At least one time-frequency resource other than the time-frequency resource is a second time-frequency resource occupied by the second node, between the first node and all the second nodes on the time slot capable of frequency division multiplexing The spatial isolation is less than or equal to the maximum distance to be met between nodes with communication requirements;

And a transceiver module, configured to perform data transmission on the first time-frequency resource.
The device of claim 11, wherein the processing module is specifically configured to:

After determining that the ratio of the occupied time slot to all time slots is greater than or equal to a set threshold, the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources, the first time-frequency resource occupied by the first node is selected.
The device of claim 12, wherein the processing module is further configured to:

After determining that the ratio of the occupied time slot to all the time slots is less than the threshold, the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.
The apparatus of claim 11, wherein the processing module determines that the spatial isolation between all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a node having communication requirements The maximum distance to be met, including:

Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements; or

Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing, that the first node is capable of performing frequency division The path loss information between each of the second nodes on the used time slot, and determining, according to the path loss information, that the spatial isolation between the first node and all the second nodes is less than Or equal to the maximum distance to be met between nodes with communication needs.
The device according to any one of claims 11 to 14, wherein the processing module is further configured to:

After determining that the first node and the second node fail to frequency division multiplexing, the first time-frequency resource is reselected.
The device of claim 15, wherein the processing module is specifically configured to:

Determining, by the third node, the notification information that is sent by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing, determining that the first node and the second node are frequency-divided The multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or

Determining, by the power measurement, that the first node determines that the first node and the second node fail to frequency division multiplexing; or

Determining, by the power measurement, that the first node determines that the first node and the second node can continue to perform frequency division multiplexing, and the third node that is sent by the transceiver module is used to indicate the first Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located The time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
The device of claim 16, wherein the processing module is specifically configured to:

Determining a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located; and

Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.
The device of claim 16, wherein the processing module is specifically configured to:

Determining a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located; and

Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource of different time slots, and the spatial isolation between the first node and the at least one second node is greater than that between the nodes having communication requirements. Determining the maximum distance to be met, determining that the first node and the second node fail to frequency division multiplexing.
The device of claim 16, wherein the processing module is specifically configured to:

If the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located The information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement. The maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.
The device according to any one of claims 11 to 19, wherein the transceiver module is further configured to: send other nodes to send on other time slots except the time slot in which the first time-frequency resource is located Information; and

The processing module is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing fails to decode on the other time slots, determine that the at least two nodes are frequency-replicated Using the failure, and controlling the transceiver module to send notification information indicating that the arbitrary two nodes fail to frequency division multiplexing to at least one of the at least two nodes.
A node device, comprising:

Processor;

a memory coupled to the processor via a bus interface and configured to store programs and data used by the processor in performing operations;

a transceiver for communicating with various other devices on a transmission medium,

When the processor calls and executes the program and data stored in the memory, the node device performs the following processing:

Selecting, from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time-frequency resources corresponding to the sub-bands in which the first node is idle, the first time-frequency resource occupied by the first node where the node device is located, where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of performing frequency division multiplexing is a second time-frequency resource occupied by the second node, where the first node and the first node The spatial isolation between all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;

Data transmission is performed on the first time-frequency resource.