CN113543363A

CN113543363A - Short wave link establishment method

Info

Publication number: CN113543363A
Application number: CN202010306921.6A
Authority: CN
Inventors: 林文长; 孟梅梅; 刘德保; 冉浩
Original assignee: Hebi Tianhai Electronic Information System Co Ltd
Current assignee: Hebi Tianhai Electronic Information System Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-10-22
Anticipated expiration: 2040-04-17
Also published as: CN113543363B

Abstract

The application discloses a short-wave link establishment method which comprises the steps that calling equipment selects a first test frequency point from a short-wave available frequency point set; sending a first call frame on a first test frequency point, so that the called equipment determines the downlink channel quality of the first test frequency point after receiving the first call frame; receiving a first response frame fed back by called equipment on a first test frequency point, wherein the first response frame comprises the downlink channel quality of the first test frequency point; obtaining the quality of an uplink channel of a first test frequency point; and if the downlink channel quality and the uplink channel quality of the first test frequency point are determined to both accord with the preset link establishment condition, establishing a link with the called equipment by using the first test frequency point. By the scheme, short-wave link establishment of the calling equipment and the called equipment can be realized, communication quality of the calling equipment and the called equipment after link establishment can be ensured as much as possible, and smooth communication between two parties can be facilitated.

Description

Short wave link establishment method

Technical Field

The application relates to the technical communication field, in particular to a short wave link establishment method.

Background

Short-wave communication is a radio communication technology, short-wave communication emission electric waves can reach called equipment only through reflection of an ionized layer, and due to the outstanding advantages of long communication distance, difficulty in thorough destruction and the like, the short-wave communication becomes a main means of remote communication and is widely applied to important fields of communication of all countries, emergency disaster relief, ocean monitoring and the like. In view of this, how to implement short-wave link establishment between the calling device and the called device becomes an urgent problem to be solved.

Disclosure of Invention

The technical problem mainly solved by the application is to provide a short wave link establishment method, which can realize short wave link establishment of a calling device and a called device.

In order to solve the technical problem, a first aspect of the present application provides a short-wave link establishment method, including that a calling device selects a first test frequency point from a short-wave available frequency point set; sending a first call frame on a first test frequency point, so that the called equipment determines the downlink channel quality of the first test frequency point after receiving the first call frame; receiving a first response frame fed back by called equipment on a first test frequency point, wherein the first response frame comprises the downlink channel quality of the first test frequency point; obtaining the quality of an uplink channel of a first test frequency point; if the downlink channel quality and the uplink channel quality of the first test frequency point are determined to meet the preset link establishment conditions, establishing a link with the called equipment by using the first test frequency point, wherein a first call frame is obtained by the called equipment through polling and scanning a plurality of preset sub-frequency bands of short waves, and is of a first signaling type; the first signaling type comprises synchronous information of a plurality of preset sub-frequency bands; the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

In order to solve the above technical problem, a second aspect of the present application provides a short-wave link establishment method, including a called device receiving a first call frame sent by a calling device at a first test frequency point, where the first test frequency point is selected from a short-wave available frequency point set; determining the quality of a downlink channel of a first test frequency point, and sending a first response frame containing the quality of the downlink channel of the first test frequency point at the first test frequency point; receiving a first confirmation frame sent by calling equipment, and establishing a link with the calling equipment by using a first test frequency point, wherein the first confirmation frame is sent by the calling equipment when determining that the downlink channel quality and the uplink channel quality of the first test frequency point both meet preset link establishment conditions, the first call frame is obtained by the called equipment through polling and scanning a plurality of preset frequency sub-bands of short waves, and the first call frame is of a first signaling type; the first signaling type comprises synchronous information of a plurality of preset sub-frequency bands, the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

The beneficial effect of this application is: different from the situation of the prior art, the short wave link establishment method provided by the application selects a first test frequency point from a short wave available frequency point set through a calling device, and sends a first call frame at the first test frequency point, wherein the first call frame is of a first signaling type, the first signaling type comprises synchronization information of a plurality of preset sub-frequency bands, so that a called device determines the downlink channel quality of the first test frequency point after receiving the first call frame through polling scanning of the plurality of preset sub-frequency bands of the short wave, receives a first response frame fed back by the called device at the first test frequency point, the first response frame is of a second signaling type, the data field of the first response frame comprises the downlink channel quality of the first test frequency point, the uplink channel quality of the first test frequency point is obtained after receiving the first response frame, and when both the uplink channel quality and the downlink channel quality meet preset link establishment conditions, and establishing a link with the called equipment by using the first test frequency point. According to the scheme, the influence of the transmission medium and the characteristics of the short wave on the channel quality is comprehensively considered, and the uplink and downlink channel quality is taken as the key element whether to establish the link, so that when the uplink and downlink channel quality of the first test frequency point meets the preset link establishment condition, the first test frequency point is utilized to establish the link, the short wave link establishment of the calling equipment and the called equipment is realized, the communication quality of the calling equipment and the called equipment after the link establishment is ensured as much as possible, and the smooth communication completion of the two parties is facilitated.

Drawings

In order to more clearly illustrate the technical solutions in the present application, the drawings required in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. Wherein:

FIG. 1 is a schematic flow chart diagram of an embodiment of a short-wave link establishment method of the present application;

FIG. 2 is a block diagram of one embodiment of short-wave full-band partitioning;

FIG. 3 is a block diagram of an embodiment of short-wave frequency bin division;

figure 4 is a block diagram of an embodiment of a first signaling type;

figure 5 is a block diagram of an embodiment of a second signaling type;

figure 6 is a block diagram of an embodiment of a third signaling type;

FIG. 7 is a schematic flow chart of another embodiment of the short-wave link establishment method of the present application;

FIG. 8 is a flowchart illustrating an embodiment of step S712 in FIG. 7;

FIG. 9 is a flowchart illustrating an embodiment of step S11 in FIG. 1;

FIG. 10 is a flowchart illustrating an embodiment of step S92 in FIG. 9;

FIG. 11 is a flowchart illustrating an embodiment of step S921 in FIG. 10;

FIG. 12 is a schematic flow chart diagram of another embodiment of the short wave link establishment method of the present application;

FIG. 13 is a schematic flow chart diagram of another embodiment of the short wave link establishment method of the present application;

FIG. 14 is a schematic flow chart diagram of another embodiment of the short wave link establishment method of the present application;

FIG. 15 is a block diagram of an embodiment of a communications device of the present application;

FIG. 16 is a block diagram of another embodiment of the communication device of the present application;

FIG. 17 is a block diagram of an embodiment of a memory device according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The short-wave link establishment method is illustrated in two aspects.

In a first aspect:

referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a short-wave link establishment method according to the present application.

Specifically, the method comprises the following steps:

step S11: the calling device selects a first test frequency point from the short-wave available frequency point set.

The calling device may be a fixed station or a mobile station, such as a vehicle-mounted station, a mobile station, and the like, and this embodiment is not limited in particular.

In one implementation scenario, the short-wave available frequency point set may be automatically generated by the calling device according to the starting frequency point and the step size. For example, the start frequency point is selected according to the longitude and latitude, the current season, the current time and the like of the calling device and the called device. For example, the step length is selected according to the link establishment requirements of the calling device and the called device, such as 60kHz, 120kHz, and 240kHz, specifically, when the link establishment environment of the calling device and the called device is a sky wave environment, the step length may be selected as 60kHz, and when the link establishment environment of the calling device and the called device is a ground wave environment, the step length may be selected as 120kHz, 240kHz, and so on, which is not illustrated here.

In another implementation scenario, the short-wave available frequency point set may also be generated by the calling device according to the ranking of the signal-to-noise ratio of each frequency point of the short wave.

The first test frequency point may be a set-top frequency point in the set of short-wave available frequency points, i.e. the first frequency point in the set of short-wave available frequency points. When the short-wave available frequency point set is generated by sequencing the calling equipment according to the signal-to-noise ratio of each frequency point of the short wave, the frequency of selecting the first test frequency point from the short-wave available frequency point set by the calling equipment can be reduced as much as possible, and therefore the success rate of building the short wave link is improved.

Step S12: and sending a first call frame on the first test frequency point, so that the called equipment determines the downlink channel quality of the first test frequency point after receiving the first call frame.

The called device may be a fixed station or a mobile station, such as a vehicle-mounted station, a mobile station, and the like, and this embodiment is not limited in particular.

In one implementation scenario, the assessment of the downlink channel quality may include, but is not limited to, the following factors: Signal-to-Noise Ratio (SNR), Bit Error Rate (BER), and multi-path fading (multi-path fading). Further, the above-mentioned signal-to-noise ratio, bit error rate, and weight of multipath fading in estimating the quality of the downlink channel may each account for 1/3. The embodiment is not particularly limited herein. In one implementation scenario, the called device may receive the first call frame by performing polling scanning on a plurality of preset sub-bands of the short wave.

In an implementation scenario, the first call frame may be of a first signaling type, and the first signaling type may include synchronization information of a plurality of preset sub-bands, and specifically, the synchronization information of different preset sub-bands is used for establishing a synchronous connection between the calling device and the called device at a frequency point in the corresponding sub-band. The detailed signaling structure of the first signaling type is not described herein for the moment.

Step S13: and receiving a first response frame fed back by the called equipment on the first test frequency point, wherein the first response frame comprises the downlink channel quality of the first test frequency point.

The called device feeds back a first response frame to the calling device after acquiring the downlink channel quality of the first test frequency point, and the first response frame comprises the downlink channel quality, so that the calling device can analyze the first response frame after receiving the first response frame, and then the downlink channel quality of the first test frequency point is acquired. In an implementation scenario, the first acknowledgement frame may be of a second signaling type, where the second signaling type may include a data field for storing channel quality, and specifically, the data field may include downlink channel quality of the first test frequency point. The detailed signaling structure of the second signaling type is not described herein for the moment.

Step S14: and obtaining the uplink channel quality of the first test frequency point.

In one implementation scenario, the assessment of the uplink channel quality may include, but is not limited to, the following factors: Signal-to-Noise Ratio (SNR), Bit Error Rate (BER), and multi-path fading (multi-path fading). Further, the above-mentioned signal-to-noise ratio, bit error rate, and weight of multipath fading in estimating the uplink channel quality may each account for 1/3. The embodiment is not particularly limited herein.

Step S15: and judging whether the downlink channel quality and the uplink channel quality of the first test frequency point both meet the preset link establishment condition, if so, executing the step S16.

In an implementation scenario, in order to evaluate whether the service requirement is met through the obtained uplink channel quality and downlink channel quality, a preset uplink channel quality may be set for the uplink channel, and a preset downlink channel quality may be set for the downlink channel, where the preset link establishment condition is that the uplink channel quality of the first test frequency point is greater than the preset uplink channel quality, and the downlink channel quality of the first test frequency point is greater than the preset downlink channel quality.

In another implementation scenario, in order to further distinguish different degrees of requirements of an uplink channel and a downlink channel on a traffic/data service on the basis of whether the service requirements are met through the obtained uplink channel quality and downlink channel quality assessment, the preset uplink channel quality set for the uplink channel and the preset downlink channel quality set for the downlink channel may be different, for example, the service requirement of the uplink channel on the traffic/data is high, and the service requirement of the downlink channel on the traffic/data is low, the preset uplink channel quality may be set to be greater than the preset downlink channel quality; or, for example, if the traffic demand of the downlink channel on the traffic/data is high, and the traffic demand of the uplink channel on the traffic/data is low, the preset downlink channel quality may be set to be greater than the preset uplink channel quality, which is not limited in this embodiment.

Step S16: and establishing a link with the called equipment by using the first test frequency point.

When the downlink channel quality and the uplink channel quality of the first test frequency point in step S15 both meet the preset link establishment condition, the first test frequency point may be used to establish a link with the called device.

In an implementation scenario, in order to select a link establishment frequency point meeting a service requirement as soon as possible, so as to enable the calling device and the called device to implement communication connection, if the downlink channel quality and/or the uplink channel quality of the first test frequency point does not meet a preset link establishment condition in step S15, the following steps may be further performed:

step S17: and reselecting the first test frequency point from the short-wave available frequency point set.

In one implementation scenario, when the short-wave available frequency point set is automatically generated by the calling device according to the starting frequency point and the step length, the reselected first test frequency point is the next frequency point in the short-wave available frequency point set, for example, the frequency point numbers of the short-wave available frequency point set are: 1. 2, 3, 4, and 5, when the frequency point number of the first selected testing frequency point is 1, the frequency point number of the first selected testing frequency point is 2 next time, and so on, and this embodiment is not exemplified one by one here.

In another implementation scenario, when the short-wave available frequency point set is generated by the calling device by sequencing according to the signal-to-noise ratios of the frequency points of the short wave, the reselected first test frequency point may be a next frequency point in the short-wave available frequency point set, for example, the frequency point numbers of the short-wave available frequency point set are: 2. 4, 3, 1 and 5, when the frequency point number of the first selected testing frequency point is 2, the frequency point number of the first selected testing frequency point is 4; or, when the short-wave available frequency point set is generated by the calling device sorting according to the signal-to-noise ratio of each frequency point of the short wave, if the downlink channel quality and/or the uplink channel quality of the first test frequency point does not meet the preset link establishment condition in step S15, the short-wave available frequency point set may be generated again according to the signal-to-noise ratio sorting of each frequency point of the short wave. The embodiment is not particularly limited herein.

Step S18: the above-described step S12 and the subsequent steps thereof are re-executed.

And after the first testing frequency point is reselected from the short-wave available frequency point set, re-executing the step S12 and the subsequent steps until the link establishment frequency point meeting the service requirement is selected.

The proposal is that a calling device selects a first test frequency point from a short wave available frequency point set, and sends a first call frame at the first test frequency point, wherein the first call frame is of a first signaling type, the first signaling type comprises synchronous information of a plurality of preset sub-frequency bands, so that a called device determines the downlink channel quality of the first test frequency point after receiving the first call frame by polling and scanning the plurality of preset sub-frequency bands of the short wave, and receives a first response frame fed back by the called device at the first test frequency point, the first response frame is of a second signaling type, the data field of the first response frame comprises the downlink channel quality of the first test frequency point, the uplink channel quality of the first test frequency point is obtained after receiving the first response frame, and then the first test frequency point is used for establishing a link with the called device when the uplink channel quality and the downlink channel quality both meet the link establishment condition, therefore, the influence of the transmission medium and the characteristics of the short wave on the channel quality is comprehensively considered, the uplink and downlink channel quality is taken as the key element whether to establish the link, and when the uplink and downlink channel quality of the first test frequency point both meet the preset link establishment condition, the first test frequency point is utilized to establish the link, so that the short wave link establishment of the calling equipment and the called equipment is realized, the communication quality of the calling equipment and the called equipment after the link establishment is ensured as much as possible, and the smooth communication completion of the two parties is facilitated.

In an embodiment, when the downlink channel quality and the uplink channel quality of the first test frequency point in step S15 both meet the preset link establishment condition, in order to enable the called terminal to communicate with the calling terminal at the first test frequency point after the called terminal is clear, step S16 may include sending a first acknowledgement frame to the called device at the first test frequency point, so as to complete link establishment with the called device at the first test frequency point.

In another embodiment, in order to reduce the period duration of the three-way handshake, the short-wave full frequency band may be divided into a plurality of preset sub-frequency bands, so that the called device receives the first call frame by performing polling scanning on the plurality of preset sub-frequency bands of the short wave. Specifically, referring to fig. 2 and fig. 3 in combination, fig. 2 is a schematic diagram of a framework of an embodiment of the short-wave full-band division, and fig. 3 is a schematic diagram of a framework of an embodiment of the short-wave frequency point division.

As shown in fig. 2, in this embodiment, the short-wave full frequency band (2MHz to 30MHz) is a bandwidth of 28MHz in total, according to the processing capability of the device for processing 128 channels in parallel and the interval of each channel of 60kHz, theoretically, the 128 channels in parallel can process 7.68MHz in total, and the short-wave full frequency band is divided into 4 preset sub-frequency bands, and in addition, if the 4 preset sub-frequency bands are uniformly divided, the bandwidth of 28MHz will be exceeded, and the performance of the filter design at the tail part will be reduced, so that frequency non-uniform division is adopted, and the problem is solved by overlapping, in one implementation scenario, the bandwidth of the head-to-tail preset sub-frequency band is 7.68M, and the bandwidth of the middle two preset sub-frequency bands is 6.84M. Referring to fig. 2, in an implementation scenario, when the called device performs polling in each preset sub-band, the receiving frequency point is used as the center frequency to receive signals, for example, when the first preset sub-band in fig. 2 performs polling scanning, the receiving frequency point is used as the center frequency to receive signals; in fig. 2, when performing polling scanning in the second predetermined sub-band, the signal is received at 12.62MHz as the center frequency, and so on, which is not illustrated here.

In an implementation scenario, when the called device performs polling scanning in a plurality of preset sub-bands, the called device may directly acquire a processing signal through radio frequency with a receiving frequency point of each preset sub-band as a center frequency, where a specific scheme of the radio frequency direct acquisition is the prior art in the art, and this embodiment is not described herein again.

In this embodiment, as shown in fig. 3, in this embodiment, frequency point division is performed on a short-wave full frequency band with 9.6kHz as a reference frequency interval, as shown in fig. 3, a center frequency of a frequency point 7 is 2MHz +57.6kHz, and a center frequency of a frequency point 14 is 2MHz +115.2kHz, which is not illustrated in this embodiment.

Referring to fig. 4, fig. 4 is a block diagram illustrating an embodiment of a first signaling type. The first call frame is of a first signaling type, and as shown in fig. 4, the first signaling type includes synchronization information of a plurality of preset sub-bands. Specifically, the first signaling type may include a plurality of first synchronization fields respectively corresponding to a plurality of preset sub-bands of the short wave. In an implementation scenario, when a device adopts an FPGA (Field-Programmable Gate Array) + DSP (Digital Signal Processor) architecture, coarse synchronization is often completed through the FPGA, and fine synchronization is completed through the DSP, so that the FPGA needs to buffer the processed data and then transmit the data to the DSP, thereby ensuring that the FPGA does not miss during data transmission to the DSP, however, the buffered data wastes device storage resources, in order to save storage resources, two first synchronization fields corresponding to each preset sub-band may be set in a first signaling type, and thus when a short-wave full-band is divided into 4 preset sub-bands as shown in fig. 2, the first signaling type may specifically include 8 first synchronization fields. In one implementation scenario, the first synchronization field is a string of random codes. The first synchronization field is used for the called device to synchronize with the calling device when the corresponding sub-band is scanned. In addition, the first signaling type may further include a second synchronization field for synchronization in decoding the data field and the data field. The data field of the first call frame includes a call address of the called device, so that the called device feeds back the first answer frame in response to the first call frame when determining that the call address is itself. In one implementation scenario, the first signaling type further includes a guard interval field for a guard interval of the data.

In addition, please refer to fig. 5, fig. 5 is a block diagram illustrating an embodiment of a second signaling type. The first response frame is of a second signaling type, the second signaling type includes a second synchronization field and a data field, and the second synchronization field is used for synchronization when decoding the data field. In one implementation scenario, the second signaling type further includes a guard interval field for a guard interval of the data. The downlink channel quality of the first test frequency point is contained in a data field of the second signaling type. Further, the first acknowledgement frame is of a second signaling type. It can be seen that the length of time occupied by the second signaling type is less than the length of time occupied by the first signaling type.

In the above scheme, in the three-way handshake between the calling device and the called device, the first call frame sent by the calling device to the called device is of the first signaling type, the first response frame fed back by the called device is of the second signaling type, and the first confirmation frame sent by the calling device to confirm link establishment at the first test frequency point is also of the second signaling type, the lengths of the first signaling type and the second signaling type are different, and the length of the second signaling type is smaller than that of the first signaling type, so that the channel residence time can be shortened to the maximum extent, the link establishment time of the calling device and the called device can be shortened, the link establishment speed is increased, and the link establishment efficiency is improved.

In addition, by transmitting the first call frame in the first signaling type including the first synchronization field, the calling device and the called device can be synchronized even when they are in an asynchronous System without being limited by a GPS (Global Positioning System).

Referring to fig. 7, fig. 7 is a schematic flowchart illustrating a short-wave link establishment method according to another embodiment of the present application. Specifically, the method may include the steps of:

step S701: the calling device selects a first test frequency point from the short-wave available frequency point set.

See step S11 above.

Step S702: and sending a first call frame on the first test frequency point, so that the called equipment determines the downlink channel quality of the first test frequency point after receiving the first call frame.

See step S12 above.

Step S703: and receiving a first response frame fed back by the called equipment on the first test frequency point, wherein the first response frame comprises the downlink channel quality of the first test frequency point.

The called device feeds back a first response frame to the calling device after acquiring the downlink channel quality of the first test frequency point, and the first response frame comprises the downlink channel quality, so that the calling device can analyze the first response frame after receiving the first response frame, and then the downlink channel quality of the first test frequency point is acquired.

Step S704: and obtaining the uplink channel quality of the first test frequency point.

Step S705: and judging whether the downlink channel quality and the uplink channel quality of the first test frequency point both accord with a preset link establishment condition, if so, executing the step S706.

See step S15 above.

Step S706: and establishing a link with the called equipment by using the first test frequency point.

When the quality of the upper and lower channels and the quality of the upper and lower channels of the first test frequency point in step S705 both meet the preset link establishment condition, the first test frequency point may be used to establish a link with the called device.

In this embodiment, in order to select a link establishment frequency point meeting the service requirement as soon as possible, if the downlink channel quality and/or the uplink channel quality of the first test frequency point does not meet the preset link establishment condition in step S705, the following steps S707 to S708 may be further performed:

step S707: and reselecting the first test frequency point from the short-wave available frequency point set.

See step S17 above.

Step S708: the above step S702 and the subsequent steps are re-executed.

After the first testing frequency point is reselected from the short-wave available frequency point set, the step S702 and the subsequent steps are executed again until the link establishment frequency point meeting the service requirement is selected.

In this embodiment, after the three-way handshake between the calling device and the called device quickly establishes the connection link through the above steps, the method may further include:

step S709: and sending second call frames at second test frequency points with preset number in front and back of the first test frequency point respectively, so that the called equipment selects the second test frequency points meeting the preset channel conditions from the second test frequency points with the preset number in front and back after receiving the second call frames.

In an implementation scenario, the preset number may be set according to the short-wave channel characteristics and the device processing resources, for example, the preset number may be 16, 32, and so on, which is not illustrated here.

In an implementation scenario, in order to select a frequency point with the best channel quality from the second test frequency points, the preset channel condition may be the second test frequency point with the best downlink channel quality.

Step S710: and receiving a second response frame fed back by the called equipment on the first test frequency point and a third response frame fed back on the selected second test frequency point.

In one implementation scenario, the second acknowledgement frame and the third acknowledgement frame are of a second signaling type. The second signaling type may specifically refer to fig. 5 and the foregoing embodiments, and this embodiment is not described herein again.

In an implementation scenario, step S710 in this embodiment may specifically include: and receiving a second response frame fed back by the called equipment on the first test frequency point and a third response frame fed back on the selected second test frequency point by taking the first test frequency point as a central frequency point.

Step S711: and obtaining the channel quality of the first test frequency point based on the second response frame, and obtaining the channel quality of the selected second test frequency point based on the third response frame.

In an implementation scenario, a data field in a second response frame fed back by the called device includes a downlink channel quality of the first test frequency point, and a data field in a third response frame includes a downlink channel quality of the selected second test frequency point, so that the calling device obtains the downlink channel quality of the first test frequency point based on the second response frame, and obtains the downlink channel quality of the selected second test frequency point based on the third response frame.

In an implementation scenario, step S711 in this embodiment may specifically include: and acquiring the uplink channel quality and the downlink channel quality of the first test frequency point based on the second response frame, and acquiring the uplink channel quality and the downlink channel quality of the selected second test frequency point based on the third response frame.

Step S712: and selecting the final link establishment frequency point from the first test frequency point and the selected second test frequency point based on the channel quality of the first test frequency point and the channel quality of the selected second test frequency point.

In an implementation scenario, the calling device may select an optimal corresponding frequency point as a final link establishment frequency point based on the downlink channel quality of the first test frequency point included in the second response frame and the downlink channel quality of the selected second test frequency point included in the third response frame.

In another implementation scenario, referring to fig. 8, step S712 in this embodiment may specifically include:

step S7121: and acquiring the first comprehensive channel quality based on the uplink channel quality and the downlink channel quality of the first test frequency point.

In an implementation scenario, the weights of the uplink channel quality and the downlink channel quality may be determined according to the priorities of the uplink service and the downlink service, and then the weighting operation is performed on the uplink channel quality and the downlink channel quality, so as to obtain the first comprehensive channel quality. For example, if the priorities of the uplink service and the downlink service are equal, it may be determined that the weight of the uplink channel quality is 0.5, and the weight of the downlink channel quality is also 0.5; or the priority of the uplink service is slightly higher than the priority of the downlink service, it may be determined that the weight of the uplink channel quality is 0.6, and the weight of the downlink channel quality is 0.4, which is not illustrated here.

Step S7122: and acquiring the quality of a second comprehensive channel based on the quality of the uplink channel and the quality of the downlink channel of the selected second test frequency point.

In an implementation scenario, the weights of the uplink channel quality and the downlink channel quality may be determined according to the priorities of the uplink service and the downlink service, and then the weighting operation is performed on the uplink channel quality and the downlink channel quality, so as to obtain the second comprehensive channel quality. For example, if the priorities of the uplink service and the downlink service are equal, it may be determined that the weight of the uplink channel quality is 0.5, and the weight of the downlink channel quality is also 0.5; or the priority of the uplink service is slightly higher than that of the downlink service, it can be determined that the weight of the uplink channel quality is 0.6, and the weight of the downlink channel quality is 0.4.

Step S7123: and selecting the final link establishment frequency point from the first test frequency point and the selected second test frequency point by determining the frequency point corresponding to the first comprehensive channel quality and the second comprehensive channel quality with better channel quality.

And selecting the frequency point corresponding to the first comprehensive channel quality and the second comprehensive channel quality with better channel quality, and taking the frequency point as the final link establishment frequency point.

The steps S7121 and S7122 are executed in no order, for example: step S7121 is executed first, and then step S7122 is executed; alternatively, step S7122 is performed first, and then step S7121 is performed; or step S7121 and step S7122 may be performed simultaneously, and the embodiment is not particularly limited herein.

Step S713: and reusing the final link establishment frequency point to establish a link with the called equipment.

And reusing the final link establishment frequency point to establish a link with the called equipment. In an implementation scenario, the step S713 may specifically include sending a second confirmation frame to the called device at the final link establishment frequency point, so as to complete link establishment with the called device at the final link establishment frequency point.

In an implementation scenario, in order to obtain synchronization information required by a second testing frequency point corresponding to a preset amount of second testing frequency points before and after a first testing frequency point, a second call frame may be of a third signaling type, please refer to fig. 6 in combination, where fig. 6 is a schematic frame diagram of an embodiment of the third signaling type. The third signaling type comprises synchronous information of a preset frequency sub-band corresponding to the second testing frequency point. In one implementation scenario, the third signaling type specifically includes a first synchronization field corresponding to a predetermined sub-band, a second synchronization field, and a data field. In an implementation scenario, when the device adopts an FPGA (Field-Programmable Gate Array) + DSP (Digital Signal Processor) architecture, coarse synchronization is often completed through the FPGA, and fine synchronization is completed through the DSP, so that the FPGA needs to buffer the processed data and then transmit the data to the DSP, thereby ensuring that the FPGA does not miss during data transmission to the DSP, however, the buffered data wastes the device storage resources, and in order to save the storage resources, the third signaling type may specifically set two first synchronization fields corresponding to the preset sub-bands.

In addition, the third signaling type may further include a guard interval field for a guard interval of the data. It can be seen that the length of time occupied by the third signalling type is less than the length of time occupied by the first signalling type.

According to the scheme, after the calling equipment and the called equipment are used for shaking hands for three times to quickly establish a connection link at the first test frequency point, the second call frames are sent at the second test frequency points with the preset number in front of and behind the first test frequency point, so that the second test frequency points meeting the preset channel conditions are selected, and the final link establishment frequency point is selected from the selected second test frequency points and the first test frequency points on the basis of the channel quality of the selected second test frequency points and the first test frequency points, so that the frequency point with the optimal channel quality in the local frequency points can be further selected for final link establishment on the basis of realizing quick link establishment, and further the communication quality of both the calling equipment and the called equipment is favorably improved.

Referring to fig. 9, fig. 9 is a flowchart illustrating an embodiment of step S11 in fig. 1. Specifically, step S11 may include:

step S91: and acquiring a short-wave available frequency point set.

Specifically, the short-wave available frequency point set may be obtained based on a preset starting frequency point and a frequency step.

Step S92: and sequentially selecting the first test frequency point in the short-wave available frequency point set.

Specifically, the first test frequency point may be selected in the short-wave frequency point set obtained based on the preset starting frequency point and the frequency step length according to a sequence.

In addition, in an implementation scenario, please refer to fig. 10 in combination, fig. 10 is a flowchart illustrating an embodiment of step S92 in fig. 9, and step S92 may be further implemented by the following steps:

step S921: and sequencing the frequency points in the short wave available frequency point set according to the quality sequence of the signal to noise ratio of each frequency point.

Specifically, referring to fig. 11 in combination, fig. 11 is a schematic flowchart illustrating an embodiment of step S921 in fig. 10, where step S921 specifically includes:

step S9211: and acquiring the real-time signal-to-noise ratio of each frequency point of the short-wave available frequency point set and the historical signal-to-noise ratio of each frequency point.

The real-time signal-to-noise ratio is the current signal-to-noise ratio of each frequency point, and the historical signal-to-noise ratio is the signal-to-noise ratio of the historical communication of each frequency point.

Step S9212: a first weight of a real-time signal-to-noise ratio and a second weight of a historical signal-to-noise ratio are determined.

In an implementation scenario, in order to distinguish the priority of the real-time signal-to-noise ratio and the historical signal-to-noise ratio for selecting the first test frequency point when the calling device is a mobile station or a fixed station, when the calling device is a mobile station, the ratio of the first weight to the second weight is greater than 1, that is, the first weight of the real-time signal-to-noise ratio is greater than the second weight of the historical signal-to-noise ratio; when the calling device is a fixed station, the ratio of the first weight to the second weight is less than 1, that is, the first weight of the real-time signal-to-noise ratio is less than the second weight of the historical signal-to-noise ratio.

Step S9213: and performing weighting operation on the real-time signal-to-noise ratio and the historical signal-to-noise ratio by using the first weight and the second weight, and arranging the frequency points of the short-wave available frequency point set according to the weighting result from large to small.

In one implementation scenario, when the first weight and the second weight are greater than 1, the weighted operation performed on the real-time snr and the historical snr by using the first weight and the second weight may be a weighted average; in another implementation scenario, when the first weight and the second weight are smaller than 1, the weighting operation performed on the real-time snr and the historical snr by using the first weight and the second weight may be a weighted sum, which is not limited in this embodiment.

Step S922: and selecting the frequency points in the short-wave available frequency point set as first test frequency points according to the sequencing in the short-wave available frequency point set.

When the frequency points in the short-wave available frequency point set are sequenced according to the order of the signal to noise ratio of each frequency point, the first test frequency point can be selected according to the sequencing of each frequency point in the short-wave available frequency point set.

In a second aspect:

referring to fig. 12, fig. 12 is a schematic flowchart of a short-wave link establishment method according to another embodiment of the present application. Specifically, the method may include:

step 1210: the called device receives a first call frame sent by the calling device at a first test frequency point, wherein the first test frequency point is selected from the short-wave available frequency point set.

The called device can be a fixed station or a mobile station, such as a vehicle-mounted station, a mobile station and the like; the calling device may be a fixed station or a mobile station, such as a vehicle-mounted station, a mobile station, and the like, and this embodiment is not limited in particular.

In another implementation scenario, the short-wave available frequency point set may also be generated by the calling device according to the ranking of the signal-to-noise ratios of the frequency points of the short wave.

The first test frequency point may be a set-top frequency point in the set of short-wave available frequency points, i.e. the first frequency point in the set of short-wave available frequency points. Therefore, when the short-wave available frequency point set can also be generated by sequencing the calling equipment according to the signal-to-noise ratio of each frequency point of the short wave, the frequency of selecting the first test frequency point from the short-wave available frequency point set by the calling equipment can be reduced as much as possible, and the success rate of building the short wave link is improved. In one implementation scenario, the first call frame is received by the called device through polling scanning of multiple preset sub-bands of short waves. In another implementation scenario, the first call frame may be a first signaling type, and the first signaling type may include synchronization information of multiple preset sub-bands, and specifically, the synchronization information of different preset sub-bands may be used for the calling device and the called device to establish a synchronous connection on a frequency point in the corresponding sub-band. For a specific signaling structure of the first signaling type, reference may be made to the foregoing embodiments, and details are not described herein.

Step S1220: and determining the quality of the downlink channel of the first test frequency point, and sending a first response frame containing the quality of the downlink channel of the first test frequency point at the first test frequency point.

In one implementation scenario, the assessment of the downlink channel quality may include, but is not limited to, the following factors: Signal-to-Noise Ratio (SNR), Bit Error Rate (BER), and multi-path fading (multi-path fading). Further, the above-mentioned signal-to-noise ratio, bit error rate, and weight of multipath fading in estimating the quality of the downlink channel may each account for 1/3. The embodiment is not particularly limited herein. In an implementation scenario, the first acknowledgement frame may be of a second signaling type, and the second acknowledgement frame may include a data field for storing channel quality, and specifically, the data field may include downlink channel quality of the first test frequency point. For a specific signaling structure of the second signaling type, reference may be made to the foregoing embodiments, and details are not described herein.

Step S1230: and receiving a first confirmation frame sent by the calling equipment, and establishing a link with the calling equipment by using the first test frequency point, wherein the first confirmation frame is sent by the calling equipment when the downlink channel quality and the uplink channel quality of the first test frequency point are determined to meet the preset link establishment condition.

In another implementation scenario, in order to further distinguish different requirements of the uplink channel and the downlink channel on the traffic/data service based on whether the obtained uplink channel quality and downlink channel quality assessment satisfies the service requirement, the preset uplink channel quality set for the uplink channel and the preset downlink channel quality set for the downlink channel may be different, for example, the service requirement of the uplink channel on the traffic/data is high, and the service requirement of the downlink channel on the traffic/data is low, the preset uplink channel quality may be set to be greater than the preset downlink channel quality; or, for example, if the traffic demand of the downlink channel on the traffic/data is high, and the traffic demand of the uplink channel on the traffic/data is low, the preset downlink channel quality may be set to be greater than the preset uplink channel quality, which is not limited in this embodiment.

According to the scheme, the influence of the transmission medium and the characteristics of the short wave on the channel quality is comprehensively considered, and the uplink and downlink channel quality is taken as the key element whether to establish the link, so that when the uplink and downlink channel quality of the first test frequency point meets the preset link establishment condition, the first test frequency point is utilized to establish the link, the short wave link establishment of the calling equipment and the called equipment is realized, the communication quality of the calling equipment and the called equipment after the link establishment is ensured as much as possible, and the smooth communication completion of the two parties is facilitated.

In an embodiment, the step S1210 may specifically include performing polling scanning on a plurality of preset sub-bands of the short wave, so as to scan a first call frame sent by the calling device at the first test frequency point. Specifically, the manner of dividing the short-wave full frequency band into a plurality of preset sub-frequency bands may refer to the embodiment of the first aspect, and this embodiment is not described herein again.

In another embodiment, the step S1220 of "sending the first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point" specifically includes: and switching to a narrow-band mode, and sending a first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point. The first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type. For the second signaling type, reference may be specifically made to the embodiment in the first aspect, and this embodiment is not described herein again.

Referring to fig. 13, fig. 13 is a schematic flowchart of a short-wave link establishment method according to another embodiment of the present application. Specifically, the method may include the steps of:

step 1310: the called device receives a first call frame sent by the calling device at a first test frequency point, wherein the first test frequency point is selected from the short-wave available frequency point set.

Please refer to step S1210 in the previous embodiment.

The first call frame is of a first signaling type, and the first signaling type includes synchronization information of a plurality of preset sub-bands. Reference may be specifically made to the embodiments in the first aspect, and this embodiment is not described herein again.

Step S1320: and selecting the synchronization information of the preset frequency sub-band corresponding to the first test frequency point from the synchronization information of the plurality of preset frequency sub-bands contained in the first call frame, and synchronizing with the calling equipment through the selected synchronization information.

For the synchronization information of multiple preset sub-bands, reference may be specifically made to the embodiments in the first aspect, and this embodiment is not described herein again.

Step S1330: and judging whether the calling address in the first calling frame is matched with the self address. If yes, go to step S1340, otherwise go to step S1370.

In an implementation scenario, the call address is located in a data field of the first signaling type, and for the data field of the first signaling type, reference may be specifically made to the embodiment in the first aspect, and this embodiment is not described herein again.

Step S1340: and determining that the self is the opposite terminal called by the calling equipment.

When the calling address in the first calling frame is matched with the self address, the opposite terminal called by the calling equipment is confirmed to be the local equipment.

Step S1350: and determining the quality of the downlink channel of the first test frequency point, and sending a first response frame containing the quality of the downlink channel of the first test frequency point at the first test frequency point.

Specifically, reference may be made to step S1220 in the foregoing embodiment.

Step S1360: and receiving a first confirmation frame sent by the calling equipment, and establishing a link with the calling equipment by using the first test frequency point, wherein the first confirmation frame is sent by the calling equipment when the downlink channel quality and the uplink channel quality of the first test frequency point are determined to meet the preset link establishment condition.

Specifically, refer to step S1230 in the foregoing embodiment.

Step S1370: step S1310 and its subsequent steps are re-executed.

When the call address in the first call frame is not matched with the self address, it indicates that the opposite end called by the calling device is not the local device, and then the step S1310 and the subsequent steps are executed again, specifically, the polling scanning may be continuously performed on the multiple preset sub-bands of the short wave, so as to scan the first call frame sent by the calling device at the first test frequency point.

Referring to fig. 14, fig. 14 is a schematic flowchart of a short-wave link establishment method according to another embodiment of the present application. Specifically, the method may include the steps of:

step S1410: the called device receives a first call frame sent by the calling device at a first test frequency point, wherein the first test frequency point is selected from the short-wave available frequency point set.

Specifically, reference may be made to step S1210 in the foregoing embodiment.

Step S1420: and determining the quality of the downlink channel of the first test frequency point, and sending a first response frame containing the quality of the downlink channel of the first test frequency point at the first test frequency point.

Specifically, reference may be made to step S1220 in the foregoing embodiment.

Step S1430: and receiving a first confirmation frame sent by the calling equipment, and establishing a link with the calling equipment by using the first test frequency point, wherein the first confirmation frame is sent by the calling equipment when the downlink channel quality and the uplink channel quality of the first test frequency point are determined to meet the preset link establishment condition.

Specifically, refer to step S1230 in the foregoing embodiment.

In this embodiment, the first call frame is a first signaling type, and the first signaling type includes a plurality of first synchronization fields, second synchronization fields, and data fields, which correspond to a plurality of preset sub-bands of the short wave, respectively; the first call frame is used for providing the called equipment with polling scanning to a plurality of preset sub-frequency bands; the first synchronous field is used for synchronizing the called device with the calling device when the called device scans the corresponding preset sub-frequency band, the second synchronous field is used for synchronizing when the data field is decoded, and the data field in the first calling frame comprises the calling address of the called device, so that the called device responds to the first calling frame and feeds back a first response frame when the calling address is determined to be self. In addition, the second response frame, the third response frame and the second acknowledgement frame are of a second signaling type, and the second signaling type includes a second synchronization field and a data field. For the first signaling type and the second signaling type, reference may be specifically made to the embodiments in the first aspect, and this embodiment is not described herein again.

On this basis, in order to optimize the quality of the communication link between the calling device and the called device, the method may further include:

step S1440: and respectively receiving second call frames sent by the calling equipment at second test frequency points with preset quantity before and after the first test frequency point by taking the first test frequency point as a central frequency point.

In this embodiment, the second call frame is a third signaling type, and the third signaling type includes synchronization information corresponding to a preset sub-band where the second test frequency point is located. For the third signaling type, reference may be specifically made to the embodiment of the first aspect, and this example is not described herein again.

Step S1450: and selecting second testing frequency points which accord with the preset channel condition from the second testing frequency points with the preset number from front to back.

Step S1460: and the second response frame is sent on the first test frequency point, and the third response frame is sent on the selected second test frequency point.

In one implementation scenario, the second acknowledgement frame and the third acknowledgement frame are of a second signaling type. The second signaling type may specifically refer to the embodiment of the first aspect, and this embodiment is not described herein again.

In this embodiment, the second response frame, the third response frame, and the second acknowledgement frame are of a second signaling type. For the second signaling type, reference may be specifically made to the embodiment of the first aspect, and this embodiment is not described herein again.

Step S1470: and receiving a second confirmation frame sent by the calling equipment at the final link establishment frequency point, and establishing a link with the calling equipment by using the final link establishment frequency point, wherein the final link establishment frequency point is selected from the first test frequency point and the selected second test frequency point by the calling equipment according to the channel quality of the first test frequency point and the selected second test frequency point.

In this embodiment, the second acknowledgement frame is of a second signaling type, and for the second signaling type, reference may be specifically made to the embodiment in the first aspect, and details of this embodiment are not described herein again.

The method for selecting the final link establishment frequency point from the first test frequency point and the selected second test frequency point by the calling device according to the channel quality of the first test frequency point and the selected second test frequency point may be according to the downlink channel quality of the first test frequency point and the selected second test frequency point, or may be combining the first comprehensive channel quality of the first test frequency point and the second comprehensive channel quality of the selected second test frequency point, where the first comprehensive channel quality is obtained by combining the downlink channel quality and the uplink channel quality of the first test frequency point, the second comprehensive channel quality is obtained by combining the downlink channel quality and the uplink channel quality of the second test frequency point, and the specific steps may be referred to as embodiments in the first aspect, and this embodiment is not described herein again.

Referring to fig. 15, fig. 15 is a schematic block diagram of an embodiment of a communication device 1500 according to the present application. Specifically, the communication apparatus 1500 includes a processor 1510, and a communication circuit 1520 and a memory 1530 coupled to the processor 1510, wherein the processor 1510 is configured to execute program instructions in the memory 1530 so as to implement the short-wave link establishment method of the first aspect described above in conjunction with the communication circuit 1520.

The processor 1510 is configured to control the communication circuitry 1520, the memory 1530 and itself to implement the steps of the short wave link establishment method in any of the embodiments of the first aspect described above. Processor 1510 may also be referred to as a CPU (Central Processing Unit). The processor 1510 may be an integrated circuit chip having signal processing capabilities. The Processor 1510 may also be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 1510 may be commonly implemented by a plurality of integrated circuit chips.

In this embodiment, the processor 1510 is configured to control the communication circuit 1520 to select a first test frequency point from the set of short-wave available frequency points, the processor 1510 is further configured to control the communication circuit 1520 to transmit a first call frame on the first test frequency point, so that the called device determines the downlink channel quality of the first test frequency point after receiving the first call frame, the processor 1510 is further configured to control the communication circuit 1520 to receive a first response frame fed back by the called device on the first test frequency point, where the first response frame includes the downlink channel quality of the first test frequency point, the processor 1510 is further configured to obtain the uplink channel quality of the first test frequency point, and the processor 1510 is further configured to utilize the first test frequency point and the called device link if it is determined that both the downlink channel quality and the uplink channel quality of the first test frequency point meet a preset link establishment condition, where the first call frame is received by the called device through polling and scanning on a plurality of preset sub-frequency bands of the short-wave, the first call frame is of a first signaling type; the first signaling type comprises synchronous information of a plurality of preset sub-frequency bands; the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

In some embodiments, the processor 1510 is further configured to reselect the first test frequency point from the short-wave available frequency point set and perform the subsequent step of selecting the first test frequency point if it is determined that the downlink channel quality and/or the uplink channel quality of the first test frequency point do not meet the preset link establishment condition.

In some embodiments, the processor 1510 is configured to control the communication circuit 1520 to send a first acknowledgement frame to the called device at the first testing frequency point, so as to complete link establishment with the called device at the first testing frequency point, where the first acknowledgement frame is of the second signaling type, and the preset link establishment condition is that the uplink channel quality of the first testing frequency point is greater than the preset uplink channel quality, and the downlink channel quality of the first testing frequency point is greater than the preset downlink channel quality.

In some embodiments, the processor 1510 is configured to control the communication circuit 1520 to send a second call frame at a preset number of second test frequency points before and after the first test frequency point, respectively, so that the called device selects a second test frequency point meeting a preset channel condition from the preset number of second test frequency points after receiving the second call frame, the processor 1510 is configured to control the communication circuit 1520 to receive a second response frame fed back by the called device at the first test frequency point and a third response frame fed back at the selected second test frequency point, the processor 1510 is configured to obtain a channel quality of the first test frequency point based on the second response frame and obtain a channel quality of the selected second test frequency point based on the third response frame, the processor 1510 is configured to select a final link establishment frequency point from the first test frequency point and the selected second test frequency point based on the channel quality of the first test frequency point and the channel quality of the selected second test frequency point, processor 1510 is configured to control communication circuit 1520 to re-establish a link with the called device using the final link establishment frequency point, where the second response frame and the third response frame are of the second signaling type; the second call frame is of a third signaling type, and the third signaling type includes synchronization information corresponding to a preset frequency sub-band where the second test frequency point is located.

In some embodiments, the processor 1510 is configured to control the communication circuit 1520 to receive, by taking the first test frequency point as a center frequency point, a second response frame fed back by the called device on the first test frequency point and a third response frame fed back on the selected second test frequency point.

In some embodiments, the processor 1510 is configured to obtain the uplink channel quality and the downlink channel quality of the first test frequency point based on the second response frame, and obtain the uplink channel quality and the downlink channel quality of the selected second test frequency point based on the third response frame, and the processor 1510 is further configured to obtain a first integrated channel quality based on the uplink channel quality and the downlink channel quality of the first test frequency point; and acquiring a second integrated channel quality based on the uplink channel quality and the downlink channel quality of the selected second test frequency point, and the processor 1510 is further configured to select a final link establishment frequency point from the first test frequency point and the selected second test frequency point by determining a frequency point corresponding to the first integrated channel quality and the second integrated channel quality, where the channel quality is better.

In some embodiments, the preset channel conditions include: the processor 1510 is further configured to control the communication circuit 1520 to send a second acknowledgement frame to the called device at the final link establishment frequency point, so as to complete link establishment with the called device at the final link establishment frequency point, where the second acknowledgement frame is of a second signaling type.

In some embodiments, the first signaling type includes a plurality of first synchronization fields, second synchronization fields, and data fields respectively corresponding to a plurality of preset sub-bands of the short wave; the first call frame is used for providing the called equipment with polling scanning to a plurality of preset sub-frequency bands; the first synchronous field is used for synchronizing the called device with the calling device when the called device scans the corresponding preset sub-frequency band, the second synchronous field is used for synchronizing when the data field is decoded, and the data field in the first calling frame comprises the calling address of the called device, so that the called device responds to the first calling frame and feeds back a first response frame when the calling address is determined to be self; the second signaling type includes a second synchronization field and a data field; the third signaling type includes a first synchronization field, a second synchronization field, and a data field corresponding to a predetermined sub-band.

In some embodiments, the processor 1510 is further configured to obtain a short-wave available frequency point set; and sequentially selecting the first test frequency point in the short-wave available frequency point set.

In some embodiments, the processor 1510 is further configured to obtain a set of shortwave available frequency points based on the preset starting frequency point and the frequency step.

In some embodiments, the processor 1510 is further configured to rank the frequency points in the short-wave available frequency point set according to the order of the snr of each frequency point, and the processor 1510 is further configured to select the frequency points in the short-wave available frequency point set as the first test frequency points according to the ranking in the short-wave available frequency point set.

In some embodiments, the processor 1510 is further configured to obtain a real-time signal-to-noise ratio of each frequency point of the short-wave available frequency point set and a historical signal-to-noise ratio of each frequency point, the processor 1510 is further configured to determine a first weight of the real-time signal-to-noise ratio and a second weight of the historical signal-to-noise ratio, and the processor 1510 is further configured to perform a weighting operation on the real-time signal-to-noise ratio and the historical signal-to-noise ratio by using the first weight and the second weight, and rank the frequency points of the short-wave available frequency point set according to a descending order of weighting results, where when the calling device is a mobile station, a ratio of the first weight to the second weight is greater than 1, and when the calling device is a fixed station, a ratio of the first weight to the second weight is less than 1.

Referring to fig. 16, fig. 16 is a schematic block diagram of a communication device 1600 according to another embodiment of the present application. Specifically, the communication device 1600 includes a processor 1610, and a communication circuit 1620 and a memory 1630 coupled to the processor 1610, wherein the processor 1610 is configured to execute program instructions in the memory 1630 to implement the short-wave link establishment method of the second aspect in combination with the communication circuit 1620.

The processor 1610 is configured to control the communication circuit 1620, the memory 1630 and itself to implement the steps of the short-wave link establishment method in any of the above-described second aspects. Processor 1610 may also be referred to as a CPU (Central Processing Unit). Processor 1610 may be an integrated circuit chip having signal processing capabilities. Processor 1610 may also be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, processor 1610 may be implemented collectively by a plurality of integrated circuit chips.

In this embodiment, the processor 1610 is configured to control the communication circuit 1620 to receive a first call frame sent by a calling device at a first test frequency point, where the first test frequency point is selected from a set of short-wave available frequency points, the processor 1610 is further configured to determine a downlink channel quality of the first test frequency point, and control the communication circuit 1620 to send a first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point, the processor 1510 is configured to control the communication circuit 1620 to receive a first acknowledgement frame sent by the calling device, link with the calling device by using the first test frequency point, where the first acknowledgement frame is sent by the calling device when determining that both the downlink channel quality and the uplink channel quality of the first test frequency point meet preset link establishment conditions, where the first call frame is received by the called device by polling and scanning a plurality of preset sub-frequency bands of short waves, the first call frame is of a first signaling type; the first signaling type comprises synchronous information of a plurality of preset sub-frequency bands, the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

In some embodiments, the processor 1610 is further configured to select synchronization information of a preset sub-band corresponding to the first test frequency point from synchronization information of multiple preset sub-bands included in the first call frame, and synchronize with the calling device through the selected synchronization information, and the processor 1610 is further configured to determine whether a call address in the first call frame matches with an address of the processor, and if so, determine that the processor is an opposite end called by the calling device, and control the communication circuit 1620 and the processor to execute downlink channel quality determination of the first test frequency point and subsequent steps.

In some embodiments, processor 1610 is further configured to control communication circuit 1620 to switch to the narrowband mode and transmit a first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point.

In some embodiments, the processor 1610 is further configured to control the communication circuit 1620 to use the first test frequency point as a central frequency point, and respectively receive second call frames sent by the calling device at second test frequency points preset by a preset number before and after the first test frequency point, the processor 1610 is further configured to select a second test frequency point meeting a preset channel condition from the second test frequency points preset by the front and after, the processor 1610 is further configured to control the second response frame sent by the communication circuit 1620 at the first test frequency point and the third response frame sent at the selected second test frequency point, and the processor 1610 is further configured to control the communication circuit 1620 to receive a second confirmation frame sent by the calling device at a final link establishment frequency point, and establish a link with the calling device by using the final link establishment frequency point, where the final link establishment frequency point is selected by the calling device from the first test and the selected second test according to the channel quality of the first test and the selected second test frequency point, the second response frame, the third response frame and the second confirmation frame are of a second signaling type; the second call frame is of a third signaling type, and the third signaling type includes synchronization information corresponding to a preset frequency sub-band where the second test frequency point is located.

Referring to fig. 17, fig. 17 is a schematic diagram illustrating a memory device 1700 according to an embodiment of the present application. The storage device 1700 stores program instructions 1710 that can be executed by the processor, where the program instructions 1710 are configured to implement the steps in any of the above-described short-wave link establishment method embodiments of the first aspect, or implement the steps in any of the above-described short-wave link establishment method embodiments of the second aspect.

By the scheme, short-wave link establishment of the calling equipment and the called equipment is realized, communication quality of the calling equipment and the called equipment after link establishment is ensured as much as possible, and smooth communication between the calling equipment and the called equipment is facilitated.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

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

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Claims

1. A short-wave link establishment method is characterized by comprising the following steps:

the calling equipment selects a first test frequency point from the short-wave available frequency point set;

sending a first call frame on the first test frequency point, so that the called equipment determines the downlink channel quality of the first test frequency point after receiving the first call frame;

receiving a first response frame fed back by the called device on the first test frequency point, wherein the first response frame comprises the downlink channel quality of the first test frequency point;

obtaining the quality of an uplink channel of the first test frequency point;

if the downlink channel quality and the uplink channel quality of the first test frequency point are determined to both accord with the preset link establishment condition, establishing a link with the called equipment by using the first test frequency point;

the first call frame is obtained by the called device through polling and scanning a plurality of preset sub-frequency bands of short waves, and is of a first signaling type; the first signaling type comprises synchronization information of the plurality of preset sub-bands; the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

2. The short wave link construction method of claim 1, further comprising:

if the downlink channel quality and/or the uplink channel quality of the first test frequency point are determined not to accord with the preset link establishment condition, reselecting the first test frequency point from the short-wave available frequency point set, and executing the subsequent step of selecting the first test frequency point;

the establishing a link with the called device by using the first test frequency point comprises:

sending a first confirmation frame to the called device at the first test frequency point so as to complete link establishment with the called device at the first test frequency point, wherein the first confirmation frame is of a second signaling type;

and the preset link establishing condition is that the uplink channel quality of the first test frequency point is greater than the preset uplink channel quality, and the downlink channel quality of the first test frequency point is greater than the preset downlink channel quality.

3. The short wave link establishment method of claim 1, wherein after the link establishment with the called device using the first test frequency point, the method further comprises:

sending second call frames at second test frequency points with preset number in front of and behind the first test frequency point respectively, so that the called device selects second test frequency points meeting preset channel conditions from the second test frequency points with the preset number in front of and behind after receiving the second call frames;

receiving a second response frame fed back by the called device on the first test frequency point and a third response frame fed back on the selected second test frequency point;

obtaining the channel quality of the first test frequency point based on the second response frame, and obtaining the channel quality of the selected second test frequency point based on the third response frame;

selecting a final link establishment frequency point from the first test frequency point and the selected second test frequency point based on the channel quality of the first test frequency point and the channel quality of the selected second test frequency point;

reusing the final link establishment frequency point and the called equipment to establish a link;

wherein the second response frame and the third response frame are of a second signaling type; the second call frame is of a third signaling type, and the third signaling type includes synchronization information corresponding to a preset sub-band where the second test frequency point is located.

4. The short wave link establishment method according to claim 3, wherein the receiving of the second response frame fed back by the called device on the first test frequency point and the third response frame fed back on the selected second test frequency point comprises:

receiving a second response frame fed back by the called equipment on the first test frequency point and a third response frame fed back on the selected second test frequency point by taking the first test frequency point as a central frequency point;

the obtaining the channel quality of the first test frequency point based on the second response frame and the obtaining the channel quality of the selected second test frequency point based on the third response frame include:

acquiring the uplink channel quality and the downlink channel quality of the first test frequency point based on the second response frame, and acquiring the uplink channel quality and the downlink channel quality of the selected second test frequency point based on the third response frame;

selecting a final link establishment frequency point from the first test frequency point and the selected second test frequency point based on the channel quality of the first test frequency point and the channel quality of the selected second test frequency point, wherein the selecting step comprises the following steps:

acquiring a first comprehensive channel quality based on the uplink channel quality and the downlink channel quality of the first test frequency point; and the number of the first and second groups,

acquiring the quality of a second comprehensive channel based on the quality of the uplink channel and the quality of the downlink channel of the selected second test frequency point;

and selecting the final link establishment frequency point from the first test frequency point and the selected second test frequency point by determining the frequency point corresponding to the first comprehensive channel quality and the second comprehensive channel quality with better channel quality.

5. The short wave link construction method of claim 3, wherein the preset channel conditions comprise: the second test frequency point with the optimal downlink channel quality;

the reusing the final link establishment frequency point and the link establishment of the called device comprises:

and sending a second confirmation frame to the called equipment at the final link establishment frequency point so as to complete link establishment with the called equipment at the final link establishment frequency point, wherein the second confirmation frame is of a second signaling type.

6. The short wave link establishment method according to any one of claims 1 to 5, wherein the first signaling type comprises a plurality of first synchronization fields, second synchronization fields and data fields corresponding to a plurality of preset sub-bands of the short wave, respectively; the first call frame is used for providing the called device with polling scanning on the preset sub-bands; the first synchronization field is used for synchronizing the called device with the calling device when the called device scans the corresponding preset sub-frequency band, the second synchronization field is used for synchronizing when the data field is decoded, and the data field in the first call frame comprises a call address of the called device, so that the called device responds to the first call frame to feed back the first response frame when the call address is determined to be self;

the second signaling type comprises the second synchronization field and a data field;

the third signaling type includes a first synchronization field, the second synchronization field, and a data field corresponding to the preset sub-band.

7. The short wave link establishment method of claim 1, wherein the selecting a first test frequency point from the short wave available frequency point set comprises:

acquiring a short-wave available frequency point set;

and sequentially selecting the first test frequency point in the short-wave available frequency point set.

8. The short-wave link establishment method of claim 7, wherein the acquiring a short-wave available frequency point set comprises:

acquiring the short-wave available frequency point set based on a preset initial frequency point and a frequency step; and/or the presence of a gas in the gas,

the sequentially selecting the first test frequency point in the short-wave available frequency point set includes:

sequencing the frequency points in the short-wave available frequency point set according to the sequence of the signal-to-noise ratio of each frequency point;

selecting the frequency points in the short-wave available frequency point set as the first test frequency points according to the sequencing in the short-wave available frequency point set;

the method for sequencing the frequency points in the short-wave available frequency point set according to the quality sequence of the signal-to-noise ratio of each frequency point comprises the following steps:

acquiring a real-time signal-to-noise ratio of each frequency point of the short-wave available frequency point set and a historical signal-to-noise ratio of each frequency point;

determining a first weight of the real-time signal-to-noise ratio and a second weight of the historical signal-to-noise ratio;

performing weighting operation on the real-time signal-to-noise ratio and the historical signal-to-noise ratio by using the first weight and the second weight, and arranging the frequency points of the short-wave available frequency point set according to the weighting result from large to small;

when the calling device is a mobile station, the ratio of the first weight to the second weight is greater than 1, and when the calling device is a fixed station, the ratio of the first weight to the second weight is less than 1.

9. A short-wave link establishment method is characterized by comprising the following steps:

the called equipment receives a first call frame sent by the calling equipment at a first test frequency point, wherein the first test frequency point is selected from a short-wave available frequency point set;

determining the quality of the downlink channel of the first test frequency point, and sending a first response frame containing the quality of the downlink channel of the first test frequency point at the first test frequency point;

receiving a first acknowledgement frame sent by the calling equipment, and establishing a link with the calling equipment by using the first test frequency point, wherein the first acknowledgement frame is sent by the calling equipment when determining that the downlink channel quality and the uplink channel quality of the first test frequency point both accord with a preset link establishment condition;

the first call frame is obtained by the called device through polling and scanning a plurality of preset sub-frequency bands of short waves, and is of a first signaling type; the first signaling type comprises synchronous information of the preset sub-frequency bands, the first response frame is of a second signaling type, and the downlink channel quality of the first test frequency point is contained in a data field of the second signaling type.

10. The short wave link establishment method according to claim 9, further comprising, after the receiving a first call frame sent by the calling device at a first test frequency point:

selecting the synchronization information of the preset frequency sub-band corresponding to the first test frequency point from the synchronization information of the plurality of preset frequency sub-bands contained in the first call frame, and synchronizing with the calling equipment through the selected synchronization information;

and judging whether the call address in the first call frame is matched with the address of the calling equipment, if so, determining the calling equipment as the opposite end called by the calling equipment, and executing the steps of determining the downlink channel quality of the first test frequency point and the subsequent steps.

11. The short wave link establishment method according to claim 10, wherein the sending a first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point comprises:

and switching to a narrow band mode, and sending a first response frame containing the downlink channel quality of the first test frequency point at the first test frequency point.

12. The short-wave link establishment method of claim 9, further comprising, after the link establishment with the calling device using the first test frequency point:

respectively receiving second call frames sent by the calling equipment at second test frequency points with preset quantity before and after the first test frequency point by taking the first test frequency point as a central frequency point;

selecting second test frequency points which accord with the preset channel condition from the second test frequency points with the preset number;

a second response frame sent on the first test frequency point and a third response frame sent on the selected second test frequency point;

receiving a second confirmation frame sent by the calling equipment at a final link establishment frequency point, and establishing a link with the calling equipment by using the final link establishment frequency point, wherein the final link establishment frequency point is selected from the first test frequency point and the selected second test frequency point by the calling equipment according to the channel quality of the first test frequency point and the selected second test frequency point;

the second response frame, the third response frame and the second acknowledgement frame are of a second signaling type; the second call frame is of a third signaling type, and the third signaling type includes synchronization information corresponding to a preset sub-band where the second test frequency point is located.

13. The short wave link establishment method according to any one of claims 10 to 12, wherein the first signaling type comprises a plurality of first synchronization fields, second synchronization fields and data fields corresponding to a plurality of preset sub-bands of the short wave, respectively; the first call frame is used for providing the called device with polling scanning on the preset sub-bands; the first synchronization field is used for synchronizing the called device with the calling device when the called device scans the corresponding preset sub-frequency band, the second synchronization field is used for synchronizing when the data field is decoded, and the data field in the first call frame comprises a call address of the called device, so that the called device responds to the first call frame to feed back the first response frame when the call address is determined to be self;