WO2020257984A1 - Procédé d'établissement de liaison pour communication à ondes courtes, système de communication, et support stockage - Google Patents

Procédé d'établissement de liaison pour communication à ondes courtes, système de communication, et support stockage Download PDF

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Publication number
WO2020257984A1
WO2020257984A1 PCT/CN2019/092573 CN2019092573W WO2020257984A1 WO 2020257984 A1 WO2020257984 A1 WO 2020257984A1 CN 2019092573 W CN2019092573 W CN 2019092573W WO 2020257984 A1 WO2020257984 A1 WO 2020257984A1
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WIPO (PCT)
Prior art keywords
current frequency
link establishment
link
signal quality
quality
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Ceased
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PCT/CN2019/092573
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English (en)
Chinese (zh)
Inventor
周昆湘
林文长
程生见
郝增盈
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Hebi Tianhai Electronic Information System Co Ltd
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Hebi Tianhai Electronic Information System Co Ltd
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Priority to PCT/CN2019/092573 priority Critical patent/WO2020257984A1/fr
Publication of WO2020257984A1 publication Critical patent/WO2020257984A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters

Definitions

  • This application relates to the field of communication technology, and in particular to a method for establishing a shortwave communication link, a communication system and a storage medium.
  • shortwave communication channels Due to the influence of factors such as the ionosphere and environment, shortwave communication channels have a certain degree of randomness and uncertainty. Therefore, real-time selection of communication frequencies plays a vital role in shortwave communication systems.
  • the inventor of the present application has discovered in long-term research and development that for the 2G Automatic Link Establish (ALE) protocol, the user needs to first set the channel group based on experience and use the frequency shift keying (FSK, Frequency Shift Keying) waveform to pass
  • the three-way handshake is used to obtain the link quality (LQA, Link Quality Analysis) of each channel in the channel group; finally, the channel is filtered according to the historical LQA value, and the link is established; detection and link establishment are separated, and the three-way handshake is used for detection, three times
  • the handshake is used to build the chain, which takes a long time, and the LQA when building the chain is a historical value, and the real-time performance is not strong; for the 3G-ALE protocol, the user also needs to preset the channel group according to the experience value, use the burst waveform, and pass the two handshake The way to establish the link; without the process of detection, the calling party and the called party cannot obtain a complete channel quality assessment.
  • the main problem to be solved by this application is to provide a shortwave communication link establishment method, communication system and storage medium, which can obtain the quality of the two-way channel in real time and select a channel matching the current service type.
  • the technical solution adopted in this application is to provide a shortwave communication link establishment method, which includes: selecting the current frequency from the shortwave communication frequency set; sending a link establishment request to the called party on the current frequency; Receive the link establishment response message sent by the called party on the current frequency; extract from the link establishment response message the uplink signal quality corresponding to the current frequency obtained by the called party’s quality assessment of the link establishment request, and respond to the link establishment response message Perform quality evaluation to obtain the downlink signal quality corresponding to the current frequency; according to the uplink signal quality and downlink signal quality corresponding to the current frequency, decide whether to establish a link with the called party at the current frequency.
  • Another technical solution adopted by this application is to provide a method for establishing a shortwave communication link.
  • the method includes: receiving a link establishment request sent by a calling party on the current frequency;
  • the quality evaluation obtains the uplink signal quality corresponding to the current frequency;
  • the link establishment response message is sent to the calling party on the current frequency, where the link establishment response message includes the uplink signal quality corresponding to the current frequency.
  • another technical solution adopted by this application is to provide a communication system, which includes a calling party and a called party connected to each other, wherein the calling party is used to select the current shortwave communication frequency set.
  • Frequency send a link establishment request to the called party on the current frequency; the called party evaluates the quality of the link establishment request to obtain the uplink signal quality corresponding to the current frequency, and sends a link establishment response message to the caller on the current frequency
  • the link establishment response message includes the uplink signal quality corresponding to the current frequency.
  • the calling party extracts the uplink signal quality from the link establishment response message and evaluates the link establishment response message to obtain the downlink signal quality corresponding to the current frequency. , And further determine whether to establish a link with the called party at the current frequency according to the uplink signal quality and downlink signal quality corresponding to the current frequency.
  • the beneficial effects of this application are: the calling party selects the current frequency from the shortwave communication frequency set; sends a link establishment request to the called party on the current frequency; the called party performs quality on the received link establishment request Estimate to obtain the uplink signal quality corresponding to the current frequency, and add the uplink signal quality to the link establishment response message and send it to the calling party; the calling party extracts the uplink signal quality from the link establishment response message and performs the link establishment response message Quality evaluation to obtain the downlink signal quality corresponding to the current frequency; the calling party decides whether to establish a link with the called party at the current frequency according to the uplink signal quality and downlink signal quality corresponding to the current frequency; the calling party and the called party can be used Information exchange between parties to obtain the quality of the two-way channel in real time, select the channel that matches the current service type, and quickly establish a link.
  • FIG. 1 is a schematic flowchart of an embodiment of a method for establishing a link for shortwave communication provided by the present application
  • FIG. 2 is a schematic flowchart of another embodiment of a method for establishing a link for shortwave communication provided by the present application
  • FIG. 3 is a schematic flowchart of another embodiment of the method for establishing a link for shortwave communication provided by the present application
  • Fig. 4 is a schematic structural diagram of an embodiment of a communication system provided by the present application.
  • FIG. 5 is a schematic diagram of interaction between a calling party and a called party in the communication system shown in FIG. 4;
  • Fig. 6 is a schematic structural diagram of an embodiment of a storage medium provided by the present application.
  • Fig. 1 is a schematic flowchart of an embodiment of a method for establishing a link for shortwave communication provided by the present application. The method includes the following steps:
  • Step 11 Select the current frequency from the shortwave communication frequency set.
  • the calling party selects a frequency from the shortwave communication frequency set as the current frequency to send information.
  • the method of selecting the current frequency can be random selection or selection according to preset rules.
  • Step 12 Send a link establishment request to the called party on the current frequency.
  • the calling party sends a link establishment request to the called party on the current frequency, and the link establishment request is used to request the called party to establish a communication link.
  • Step 13 Receive the link establishment response message sent by the called party on the current frequency.
  • the called party After the calling party sends a link establishment request to the called party on the current frequency, the called party responds to the link establishment request.
  • the calling party receives the link establishment response message sent by the called party on the current frequency.
  • the link response message includes the uplink signal quality corresponding to the link establishment request sent using the current frequency.
  • Step 14 Extract from the link establishment response message the uplink signal quality corresponding to the current frequency obtained by the called party performing quality assessment on the link establishment request, and perform quality assessment on the link establishment response message to obtain the downlink signal corresponding to the current frequency quality.
  • the calling party extracts the uplink signal quality corresponding to the current frequency from the link establishment response message, and evaluates the quality of the received link establishment response message to obtain the downlink signal quality corresponding to the current frequency.
  • Step 15 According to the uplink signal quality and downlink signal quality corresponding to the current frequency, decide whether to establish a link with the called party at the current frequency.
  • the calling party judges whether the channel quality of the current frequency is suitable for link establishment according to the obtained uplink signal quality, downlink signal quality and the channel quality required by the current service type. If the channel quality of the current frequency meets the link establishment conditions, Then the calling party and the called party establish a link on the current frequency; if the channel quality of the current frequency does not meet the link establishment conditions, return to step 11, select another frequency from the shortwave communication frequency set as the current frequency, until it finds The frequency that meets the conditions of the chain is to be completed.
  • the calling party selects the current frequency from the shortwave communication frequency set; sends a link establishment request to the called party on the current frequency; the called party estimates the quality of the received link establishment request to obtain the uplink signal corresponding to the current frequency
  • the quality of the uplink signal is added to the link establishment response message and sent to the calling party; the calling party extracts the uplink signal quality from the link establishment response message and evaluates the quality of the link establishment response message to obtain the downlink corresponding to the current frequency Signal quality; the calling party decides whether to establish a link with the called party at the current frequency according to the uplink signal quality and downlink signal quality corresponding to the current frequency; it can use the information interaction between the calling party and the called party to obtain two-way real-time The quality of the channel, select the channel that matches the current service type, and quickly establish a link.
  • Figure 2 is a schematic flowchart of another embodiment of a method for establishing a link for shortwave communication provided by the present application. The method includes the following steps:
  • Step 21 Sort the available frequencies in the shortwave communication frequency set according to the historical quality data, thereby allowing the frequency to be selected as the current frequency from high to low based on the historical quality data.
  • the historical quality data corresponding to the shortwave communication frequency set can be used to sort according to the historical quality data corresponding to the frequency in the shortwave communication frequency set, and the historical quality data from high to high Select the current frequency in the lowest order.
  • the historical channel quality corresponding to frequency f1 is 10
  • the historical channel quality corresponding to frequency f2 is 8, and the historical channel quality corresponding to frequency f5
  • Step 22 Send a link establishment request to the called party on the current frequency.
  • the protocol data unit (PDU, Protocol Data Unit) in the link establishment request includes the first PDU type word, the address of the calling party, the address of the called party, the reserved blank space and the first cyclic redundancy check code, and its data structure As follows:
  • the first PDU type word can be 01
  • the cyclic redundancy check code (CRC, Cyclical Redundancy Check) can be used for data verification
  • the first CRC is used to verify whether the data received by the called party is the chain sent by the calling party Road establishment request.
  • this embodiment modifies the called party address, calling party address, reserved blank space and PDU type word space in the PDU.
  • PDU type word space
  • Step 23 Receive the link establishment response message sent by the called party on the current frequency.
  • the PDU in the link establishment response message includes the second PDU type word, the address of the calling party, the address of the called party, the first signal-to-noise ratio and the second CRC.
  • the data structure is as follows:
  • the second PDU type word can be 10, and the second CRC is used to verify whether the data received by the calling party is a link establishment response message sent by the called party.
  • this embodiment adds a signal-to-noise ratio (SNR, Signal Noise Ratio) to the PDU.
  • SNR is a main technical indicator for measuring the reliability of communication quality of a communication system, and SNR is the ratio of signal to noise; and this embodiment
  • the information carried in the PDU and the space occupied in the prior art are modified.
  • This application needs to obtain the channel quality corresponding to the current frequency transmission, so there is no need to carry the link ID and service channel information, and the address of the calling party and the called party And information such as signal-to-noise ratio.
  • Step 24 Extract from the link establishment response message the uplink signal quality corresponding to the current frequency obtained by the called party's quality assessment of the link establishment request, and perform quality assessment on the link establishment response message to obtain the downlink signal corresponding to the current frequency quality.
  • the PDU in the link establishment confirmation message includes the third PDU type word, the address of the calling party, the address of the called party, the second signal-to-noise ratio and the third CRC.
  • the data structure is as follows:
  • the first PDU type word, the second PDU type word, and the third PDU type word are different from each other.
  • the third PDU type word can be 11; the third CRC is used to verify whether the data received by the called party is sent by the calling party Confirmation message for link establishment.
  • Step 25 Save the uplink signal quality and downlink signal quality corresponding to the current frequency as historical quality data.
  • the uplink signal quality and downlink signal quality corresponding to the current frequency can be saved as historical quality data; in addition, the channel quality of the current frequency can be averaged with the channel quality corresponding to the current frequency in the historical quality data.
  • Update the historical quality data or determine the proportion of the channel quality corresponding to the current frequency in the historical channel data according to the time sequence; for example, the channel quality corresponding to the frequency f1 in the historical channel data is 20, and the channel quality corresponding to the frequency f1 is obtained in the second second.
  • Step 26 When the uplink signal quality and downlink signal quality corresponding to the current frequency are both greater than the preset channel quality threshold, use the current frequency to send a link establishment confirmation message to the called party; among the uplink signal quality and downlink signal quality corresponding to the current frequency When at least one of is less than the preset channel quality threshold, return to the step of selecting the current frequency from the shortwave communication frequency set, and then select other frequencies from the shortwave communication frequency set as the current frequency, and perform the subsequent steps until the link is successfully established.
  • the calling party judges whether the uplink signal quality and downlink signal quality corresponding to the current frequency meet the requirements of the current service type. For example, digital voice services have high requirements for channel quality, and analog voice services have low requirements for channel quality.
  • the prediction can be determined according to the service type.
  • the link confirmation message can include the downlink signal quality corresponding to the current frequency, informing the called party to establish a link at the current frequency; when the uplink signal quality or downlink signal quality is less than the preset channel quality threshold, it indicates that the channel quality corresponding to the current frequency is not suitable for transmission
  • the current service type it is necessary to re-select a frequency from the preset frequency table and perform the steps of obtaining channel quality until the quality of the two-way channel corresponding to a certain frequency meets the requirements.
  • channel quality there is a corresponding relationship between channel quality and data transmission rate.
  • the higher the channel quality the higher the data transmission rate. It can automatically match the corresponding data transmission rate according to the uplink signal quality and downlink signal quality, and automatically adjust the data transmission rate.
  • Users do not need to manually select the data transmission rate to improve the user experience; for example, when the channel quality is greater than 10dB, use to transmit data, when the channel quality is less than 10db, use the LDL protocol to transmit data.
  • HDL High Level Data Link Control
  • Advanced Data Link Control Procedure Advanced Data Link Control Procedure
  • LDL Low Level Data Link Control, Low Level Data Link Control
  • the uplink signal quality and the downlink signal quality are respectively the first SNR and the second SNR; it is determined whether the first SNR and the second SNR corresponding to the current frequency are greater than the preset SNR threshold; if the first SNR and the second SNR are Second, if the SNR is greater than the preset SNR threshold, use the current frequency to send a link establishment confirmation message to the called party; if the first SNR or the second SNR is less than the preset SNR threshold, select another frequency from the preset frequency table to continue detection Channel quality until the frequency where the SNR of the bidirectional channel is greater than the preset SNR threshold is detected.
  • this embodiment provides a method for optimizing the PDU and three-way handshake.
  • the SNR field is added to the PDU, the channel quality is detected and the link is established, and the channel quality can also be used as Reference value for next frequency selection.
  • the first SNR and the second SNR of the two-way channel corresponding to the current frequency are obtained by sending and receiving the link establishment request and the link establishment response message between the calling party and the called party, and the calling party determines whether the first SNR and the second SNR are It is greater than the preset SNR threshold.
  • a link establishment confirmation message is sent to the called party.
  • the calling party obtains the two-way channel quality corresponding to the current frequency. The current service type and two-way channel quality to select the appropriate channel.
  • FIG. 3 is a schematic flowchart of another embodiment of a method for establishing a link for shortwave communication provided by the present application. The method includes the following steps:
  • Step 31 Receive the link establishment request sent by the calling party on the current frequency, perform quality assessment on the link establishment request, and obtain the uplink signal quality corresponding to the current frequency.
  • the calling party sends a link establishment request to the called party on the current frequency.
  • the called party evaluates the transmission quality of the link establishment request to obtain the uplink signal quality corresponding to the current frequency.
  • Step 32 Send a link establishment response message to the calling party on the current frequency.
  • the called party After evaluating the transmission quality of the link establishment request, the called party sends a link establishment response message to the calling party on the current frequency to respond to the link establishment request sent by the calling party.
  • the link establishment response message contains Including the uplink signal quality corresponding to the current frequency.
  • the uplink signal quality and downlink signal quality corresponding to the current frequency are obtained, and the reference is provided for whether the link between the calling party and the called party is successfully established, and the current frequency can be obtained in real time Channel quality.
  • the method for establishing a shortwave communication link includes the following steps:
  • Step 33 Receive the link establishment confirmation message sent by the calling party on the current frequency.
  • the calling party After receiving the link establishment response message, the calling party will evaluate the transmission quality of the link establishment response message to obtain the downlink signal quality corresponding to the current frequency. The calling party determines whether it is in the current state according to the uplink signal quality and downlink signal quality. If the link is established on the frequency, if the link is established on the current frequency, the calling party sends a link establishment confirmation message to the called party.
  • Step 34 Extract the downlink signal quality corresponding to the current frequency from the link establishment confirmation information.
  • Downlink signal quality is obtained by the calling party's quality assessment of the link establishment response message. After receiving the link establishment confirmation message, the called party obtains complete channel quality information.
  • Step 35 Save the uplink signal quality and downlink signal quality corresponding to the current frequency as historical quality data.
  • the called party can save the uplink signal quality and downlink signal quality corresponding to the current frequency as historical quality data, so that the appropriate communication frequency can be selected for the next data transmission.
  • Both the calling party and the called party can obtain and save the two-way channel quality corresponding to the current frequency for subsequent channel pre-selection before link establishment. Combine the probe channel with the link establishment.
  • the first two handshake can be used by the calling party to obtain the integrity
  • the latter handshake is used to establish a link and provide the called party to obtain complete channel quality information. It can evaluate the channel quality in real time and quickly select a communication frequency matching the service to establish a link.
  • FIG. 4 is a schematic structural diagram of an embodiment of the communication system provided by the present application.
  • the communication system includes a calling party 41 and a called party 42 connected to each other.
  • FIG. 5 is the communication system shown in FIG. 4 Schematic diagram of the interaction between the calling party and the called party.
  • the calling party 41 is used to select the current frequency from the shortwave communication frequency set, and send a link establishment request to the called party 42 on the current frequency; the called party 42 evaluates the quality of the link establishment request to obtain the uplink signal corresponding to the current frequency Quality, and send a link establishment response message to the calling party 41 on the current frequency.
  • the link establishment response message includes the uplink signal quality corresponding to the current frequency; the calling party 41 extracts the uplink signal quality from the link establishment response message, and The link establishment response message performs quality evaluation to obtain the downlink signal quality corresponding to the current frequency, and further determines whether to establish a link with the called party 42 at the current frequency according to the uplink signal quality and downlink signal quality corresponding to the current frequency.
  • the calling party obtains the two-way channel quality corresponding to the current frequency; the calling party 41 judges whether to establish a link with the called party 42 at the current frequency according to the two-way channel quality, and can select the appropriate one according to the two-way channel quality Channel.
  • FIG. 6 is a schematic structural diagram of an embodiment of a storage medium provided by the present application.
  • the storage medium 60 is used to store a computer program.
  • the computer program 61 is executed by a processor, it is used to implement the shortwave communication in the above embodiment.
  • the chain building method is used to implement the shortwave communication in the above embodiment.
  • the storage medium 60 can be a server, a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc.
  • the medium of the program code can be a server, a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc.
  • the medium of the program code can be a server, a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc.
  • the medium of the program code can be a server, a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc.
  • the disclosed method and device may be implemented in other ways.
  • the device implementation described above is only illustrative, for example, the division of modules or units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of this embodiment.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé d'établissement de liaison pour communication à ondes courtes, un système de communication et un support de stockage. Le procédé consiste à : sélectionner une fréquence actuelle dans un ensemble de fréquences de communication à ondes courtes ; envoyer une demande d'établissement de liaison à une partie appelée sur la fréquence actuelle ; recevoir un message de réponse d'établissement de liaison envoyé par la partie appelée sur la fréquence actuelle ; extraire du message de réponse d'établissement de liaison une qualité de signal de liaison montante correspondant à la fréquence actuelle obtenue par la partie appelée effectuant une évaluation de qualité sur la demande d'établissement de liaison, et effectuer une évaluation de qualité sur le message de réponse d'établissement de liaison pour obtenir une qualité de signal de liaison descendante correspondant à la fréquence actuelle ; et déterminer, en fonction de la qualité de signal de liaison montante et de la qualité de signal de liaison descendante correspondant à la fréquence actuelle, s'il faut établir une liaison avec la partie appelée à la fréquence actuelle. Au moyen du procédé, la présente invention peut obtenir la qualité d'un canal bidirectionnel en temps réel, et sélectionne un canal adapté à un type de service actuel.
PCT/CN2019/092573 2019-06-24 2019-06-24 Procédé d'établissement de liaison pour communication à ondes courtes, système de communication, et support stockage Ceased WO2020257984A1 (fr)

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CN114641087A (zh) * 2022-03-11 2022-06-17 重庆邮电大学 一种短波数字信道化通探一体快速建链方法
CN114641087B (zh) * 2022-03-11 2024-05-07 重庆邮电大学 一种短波数字信道化通探一体快速建链方法
US20240204867A1 (en) * 2022-12-16 2024-06-20 Rockwell Collins, Inc. Systems and methods for adaptive beyond line of sight (blos) communications via evaporation duct

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