CN114286393A

CN114286393A - Link self-adaption method, device, equipment and storage medium

Info

Publication number: CN114286393A
Application number: CN202111624263.6A
Authority: CN
Inventors: 刘芳; 郑波浪; 时晓义
Original assignee: Beijing Shengzhe Science & Technology Co ltd
Current assignee: Beijing Shengzhe Science & Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-05

Abstract

The embodiment of the invention discloses a link self-adaption method, a device, equipment and a storage medium. The method comprises the following steps: before sending target data, a source node sends a detection message to a target node based on channel monitoring; and the source node receives the detection response message fed back by the target node and sends target data to the target node according to the optimal sending data rate and the optimal sending power carried in the detection response message. The technical scheme of the embodiment of the invention realizes that the source node acquires the current real-time link information by sending the detection information to the destination node.

Description

Link self-adaption method, device, equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a link self-adaption method, a device, equipment and a storage medium.

Background

In a wireless communication system, since link quality is greatly affected by environment, a link adaptation mechanism is required to adjust a service rate and transmission power in real time in the wireless communication system, so as to optimize communication.

The existing link adaptive mechanism usually adopts a mode of periodically collecting link information, and takes the link information in the previous period of time as the reference of the current communication link. The biggest problem of the link self-adaptive mechanism is that the link self-adaptive mechanism is influenced by an acquisition period, has no real-time performance, cannot adjust sudden link change in time, and is suitable for a system with a relatively stable wireless link.

Disclosure of Invention

The embodiment of the invention provides a link self-adaption method, a device, equipment and a storage medium, which are used for realizing that a source node acquires current real-time link information by sending detection information to a destination node.

In a first aspect, an embodiment of the present invention provides a link adaptation method, including:

before sending target data, a source node sends a detection message to a target node based on channel monitoring;

and the source node receives the detection response message fed back by the destination node and sends target data to the destination node according to the optimal sending data rate and the optimal sending power carried in the detection response message.

Optionally, before sending the target data, the source node sends a probe message to the destination node based on channel sensing, where the probe message includes:

before the source node sends the target data, starting channel monitoring and confirming whether the current channel is occupied or not;

if the source node determines that the current channel is occupied, randomly backing off, and re-listening the channel after the backing-off is finished;

and if the source node determines that the current channel is not occupied, the source node sends a probe message to the destination node on the current channel.

Optionally, the sending, by the source node, the probe message to the destination node includes:

and the source node sends the detection message to the destination node by adopting the minimum sending data rate and the maximum sending power.

In a second aspect, an embodiment of the present invention further provides a link adaptation method, including:

the target node receives the detection message sent by the source node, and calculates the optimal sending data rate and the optimal sending power from the source node to the target node according to the signal-to-noise ratio and the receiving power;

the target node carries the optimal sending data rate and the optimal sending power in the probe response message and feeds back the probe response message to the source node so that the source node sends data according to the optimal sending data rate and the optimal sending power.

Optionally, the target node feeds back the probe response message to the source node, including:

and the target node feeds the detection response message back to the source node by adopting the minimum sending data rate and the maximum sending power.

In a third aspect, an embodiment of the present invention further provides a link adaptive apparatus, including:

the detection message sending module is used for sending a detection message to a target node based on channel monitoring before sending target data;

and the data sending module is used for receiving the detection response message fed back by the target node and sending the target data to the target node according to the optimal sending data rate and the optimal sending power carried in the detection response message.

Optionally, the probe message sending module is configured to:

and sending the detection message to the destination node by adopting the minimum sending data rate and the maximum sending power.

In a fourth aspect, an embodiment of the present invention further provides a link adaptation apparatus, including:

the link information calculation module is used for receiving the detection message sent by the source node and calculating the optimal sending data rate and the optimal sending power from the source node to the destination node according to the signal-to-noise ratio and the receiving power;

and the probe response message feedback module is used for carrying the optimal sending data rate and the optimal sending power in the probe response message and feeding back the probe response message to the source node so that the source node sends data according to the optimal sending data rate and the optimal sending power.

In a fifth aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:

one or more processors;

a storage device for storing one or more programs,

when executed by one or more processors, cause the one or more processors to implement the link adaptation method provided by any of the embodiments of the present invention.

In a sixth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the link adaptation method provided in any embodiment of the present invention.

In the embodiment of the invention, a source node sends a detection message to a destination node based on channel monitoring before sending target data; the source node receives the detection response message fed back by the destination node, and sends the target data to the destination node according to the optimal sending data rate and the optimal sending power carried in the detection response message, so that the problem that a link self-adaptive mechanism in the prior art does not have real-time performance is solved, the source node obtains the current real-time link information by sending the detection information to the destination node, and sends the data according to the real-time link information.

Drawings

Fig. 1a is a flowchart of a link adaptation method according to a first embodiment of the present invention;

fig. 1b is a schematic structural diagram of a probe message according to a first embodiment of the present invention;

fig. 1c is a message interaction diagram when a channel is occupied according to a first embodiment of the present invention;

fig. 1d is a message interaction diagram when a channel is not occupied according to a first embodiment of the present invention;

fig. 1e is a schematic structural diagram of a probe response message in the first embodiment of the present invention;

fig. 1f is a message interaction diagram when no response is received in the first embodiment of the present invention;

fig. 2 is a flowchart of a link adaptation method according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a link adaptation apparatus in a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a link adaptation apparatus in a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of an electronic device in a fifth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1a is a flowchart of a link adaptation method in an embodiment of the present invention, where this embodiment is applicable to a case where a source node acquires real-time link information by sending a probe message to a destination node in a wireless system with a fast change of a wireless environment, and the method may be executed by a link adaptation apparatus, which may be implemented by hardware and/or software, and may be generally integrated in an electronic device, for example, in the source node, and used in cooperation with the destination node. As shown in fig. 1a, the method comprises:

step 110, before sending the target data, the source node sends a probe message to the destination node based on channel sensing.

In this embodiment, the source node refers to a data sender, the destination node refers to a data receiver, and the target data is data to be sent to the receiver by the sender. Before sending data each time, the source node needs to send a probe message to the destination node to obtain the current wireless link information, so as to achieve communication optimization. The data structure of the probe message is shown in fig. 1b, and includes a message Type, a node identifier SrcId of the source node, a node identifier DstId of the destination node, and a message integrity check MIC.

Optionally, before sending the target data, the source node sends the probe message to the destination node based on channel sensing, which may include: before the source node sends the target data, starting channel monitoring and confirming whether the current channel is occupied or not; if the source node determines that the current channel is occupied, randomly backing off, and re-listening the channel after the backing-off is finished; and if the source node determines that the current channel is not occupied, the source node sends a probe message to the destination node on the current channel.

In this embodiment, before the source node sends the probe message, in order to effectively reduce the transmission collision of multiple terminals, channel sensing is first started to determine whether the current channel is occupied. If the channel is occupied, cancel the sending of this detection message, and after a period of random backoff, repeat the above process, as shown in fig. 1 c; if the channel is found to be unoccupied during the listening process, a probe message (detect) is sent to the destination node, as shown in fig. 1 d. Wherein the channel sensing time of the source node is randomly selected between [0, t ].

Optionally, the sending, by the source node, the probe message to the destination node may include: and the source node sends the detection message to the destination node by adopting the minimum sending data rate and the maximum sending power.

In this embodiment, when the source node sends the probe message with a fixed sending power, in order to ensure that the signaling message achieves the maximum communication coverage, the probe message may be sent according to the minimum data rate DR _ max and the maximum sending power P _ max.

And step 120, the source node receives the probe response message fed back by the destination node, and sends the target data to the destination node according to the optimal sending data rate and the optimal sending power carried in the probe response message.

In this embodiment, after receiving the probe response message, the source node extracts the optimal transmission data rate DR and the optimal transmission power P _ tx calculated by the destination node from the probe response message according to the data structure of the probe response message shown in fig. 1e, and performs data transmission this time by using DR and P _ tx, thereby implementing optimization of data transmission.

It should be noted that, as shown in fig. 1f, if the source node does not receive the probe response message fed back by the destination node after sending the probe message to the destination node, the channel sensing is performed again after randomly backing back for a period of time, and if the channel is found to be unoccupied during the sensing process, the probe message is sent to the destination node again, and the probe response message fed back by the destination node is received again.

Example two

Fig. 2 is a flowchart of a link adaptation method in the second embodiment of the present invention, which may be applied to a case where a destination node feeds back real-time link information to a source node through a probe response message in a wireless system with a fast change of a wireless environment, and the method may be executed by a link adaptation apparatus, which may be implemented by hardware and/or software, and may be generally integrated in an electronic device, for example, in the destination node, and used in cooperation with the source node. As shown in fig. 2, the method includes:

step 210, the destination node receives the probe message sent by the source node, and calculates the optimal sending data rate and the optimal sending power from the source node to the destination node according to the signal-to-noise ratio and the receiving power.

In this embodiment, after receiving a probe message sent by a source node, a destination node calculates the received power of the probe message according to the maximum sending power P _ max and a signal transmission model, further calculates the ratio of the received power of the probe message to the received power of noise to obtain a signal-to-noise ratio, and then calculates the optimal sending data rate DR and the optimal sending power P _ tx according to a link information calculation rule set by the destination node itself.

Step 220, the destination node carries the optimal sending data rate and the optimal sending power in the probe response message, and feeds back the probe response message to the source node, so that the source node sends data according to the optimal sending data rate and the optimal sending power.

In this embodiment, in order to enable the source node to perform data transmission according to the optimal transmission data rate and the optimal transmission power, and to achieve optimization of data transmission, the optimal transmission data rate and the optimal transmission power are written in the probe response message and fed back to the source node. Optionally, the destination node feeds back the probe response message to the source node by using the minimum sending data rate and the maximum sending power, so as to ensure that the signaling message realizes the maximum communication coverage.

In the embodiment of the invention, a target node receives a detection message sent by a source node, and calculates the optimal sending data rate and the optimal sending power from the source node to the target node according to the signal-to-noise ratio and the receiving power; the target node carries the optimal sending data rate and the optimal sending power in the detection response message and feeds back the detection response message to the source node so that the source node sends data according to the optimal sending data rate and the optimal sending power, the problem that a link self-adaption mechanism in the prior art does not have real-time performance is solved, the source node sends detection information to the target node to obtain current real-time link information, and sends data according to the real-time link information.

EXAMPLE III

Fig. 3 is a schematic structural diagram of a link adaptive apparatus in a third embodiment of the present invention, which may be applied to a case where a source node acquires real-time link information by sending a probe message to a destination node in a wireless system with a fast change of a wireless environment, where the apparatus may be implemented by hardware and/or software, and may be generally integrated in an electronic device, for example, in the source node, and used in cooperation with the destination node. As shown in fig. 3, the apparatus includes:

a probe message sending module 310, configured to send a probe message to a destination node based on channel sensing before sending target data;

and a data sending module 320, configured to receive the probe response message fed back by the destination node, and send target data to the destination node according to the optimal sending data rate and the optimal sending power carried in the probe response message.

Optionally, the probe message sending module 310 is configured to:

before sending target data, starting channel monitoring and confirming whether a current channel is occupied or not;

if the current channel is determined to be occupied, randomly backing off, and re-listening the channel after the backing-off is finished;

and if the current channel is determined to be unoccupied, sending a probe message to the destination node on the current channel.

Optionally, the probe message sending module 310 is configured to: and sending the detection message to the destination node by adopting the minimum sending data rate and the maximum sending power.

The link adaptation device provided by the embodiment of the invention is applied to the source node, can execute the link adaptation method applied to the source node provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.

Example four

Fig. 4 is a schematic structural diagram of a link adaptation apparatus in a fourth embodiment of the present invention, which may be applied to a case where a destination node feeds back real-time link information to a source node through a probe response message in a wireless system with a fast change of a wireless environment, where the apparatus may be implemented by hardware and/or software, and may be generally integrated in an electronic device, for example, in the destination node, and used in cooperation with the source node. As shown in fig. 4, the apparatus includes:

a link information calculation module 410, configured to receive a probe message sent by a source node, and calculate an optimal sending data rate and an optimal sending power from the source node to a destination node according to a signal-to-noise ratio and a receiving power;

the probe response message feedback module 420 is configured to carry the optimal sending data rate and the optimal sending power in the probe response message, and feed back the probe response message to the source node, so that the source node performs data sending according to the optimal sending data rate and the optimal sending power.

Optionally, the probe response message feedback module 420 is configured to: and feeding back the probe response message to the source node by adopting the minimum sending data rate and the maximum sending power.

The link adaptation device provided by the embodiment of the invention is applied to a destination node, can execute the link adaptation method applied to the destination node provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.

EXAMPLE five

Fig. 5 is a schematic structural diagram of an electronic device disclosed in the fifth embodiment of the present invention. Fig. 5 illustrates a block diagram of an exemplary device 12 suitable for use in implementing embodiments of the present invention. The device 12 shown in fig. 5 is only an example and should not bring any limitations to the functionality and scope of use of the embodiments of the present invention.

As shown in FIG. 5, device 12 is in the form of a general purpose computing device. The components of device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.

Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

Device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by device 12 and includes both volatile and nonvolatile media, removable and non-removable media.

The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, and commonly referred to as a "hard drive"). Although not shown in FIG. 5, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.

A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.

Device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with device 12, and/or with any devices (e.g., network card, modem, etc.) that enable device 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, the device 12 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 20. As shown, the network adapter 20 communicates with the other modules of the device 12 via the bus 18. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.

The processing unit 16 executes various functional applications and data processing, such as implementing the link adaptation method provided by embodiments of the present invention, by executing programs stored in the system memory 28.

Namely: a link adaptation method is implemented, comprising:

Alternatively, a link adaptation method is implemented, including:

EXAMPLE six

The sixth embodiment of the invention also discloses a computer storage medium, on which a computer program is stored, which when executed by a processor implements a link adaptation method.

Namely: a link adaptation method is implemented, comprising:

Alternatively, a link adaptation method is implemented, including:

Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for link adaptation, comprising:

and the source node receives the detection response message fed back by the target node and sends target data to the target node according to the optimal sending data rate and the optimal sending power carried in the detection response message.

2. The method of claim 1, wherein the source node sends a probe message to the destination node based on channel sensing before sending the target data, comprising:

before the source node sends target data, channel interception is started, and whether a current channel is occupied or not is confirmed;

if the source node determines that the current channel is occupied, randomly backing off, and re-performing channel monitoring after backing off is finished;

and if the source node determines that the current channel is not occupied, the source node sends a detection message to the destination node on the current channel.

3. The method of claim 1, wherein the source node sends a probe message to the destination node, comprising:

4. A method for link adaptation, comprising:

and the target node carries the optimal sending data rate and the optimal sending power in a probe response message and feeds back the probe response message to the source node so that the source node sends data according to the optimal sending data rate and the optimal sending power.

5. The method of claim 4, wherein the destination node feeds back a probe response message to the source node, comprising:

and the target node feeds back the detection response message to the source node by adopting the minimum sending data rate and the maximum sending power.

6. A link adaptation apparatus, comprising:

and the data sending module is used for receiving the detection response message fed back by the target node and sending target data to the target node according to the optimal sending data rate and the optimal sending power carried in the detection response message.

7. The apparatus of claim 6, wherein the probe message sending module is configured to:

8. A link adaptation apparatus, comprising:

9. An electronic device, characterized in that the device comprises:

one or more processors;

a storage device for storing one or more programs,

when executed by the one or more processors, cause the one or more processors to implement the link adaptation method of any one of claims 1-3 or the link adaptation method of any one of claims 4-5.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the link adaptation method according to any one of claims 1 to 3, or carries out the link adaptation method according to any one of claims 4 to 5.