Rapid self-adaptive link establishment method and system for short-wave communication

Abstract

The invention discloses a short-wave communication rapid adaptive link establishment method and system, and the method specifically comprises the steps: dividing time slots into a protection time slot, a call time slot, a response time slot and an acknowledgement time slot, and pre-storing the frequency pattern and mapping function of each communication object in all synchronization devices; when the link is established, a calling party calculates a channel of a called party in a time slot, and sends a calling frame in the time slot; after the called party receives the calling signal, judging whether the local signal quality is greater than a frequency selection threshold, and if so, sending a response frame to the calling party; otherwise, not sending; if the calling party does not receive the response frame, repeatedly calling the called party in the next calling time slot; when the calling party receives a response signal of the called party, judging whether the quality of a local signal is greater than a frequency selection threshold, and if so, sending an acknowledgement frame; otherwise, not sending; and if the called party does not receive the acknowledgement frame, entering the next channel to establish the link until the link establishment is successful. According to the invention, the security and communication efficiency of short-wave communication data are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic communications, and in particular to a method and system for rapid adaptive link establishment in shortwave communication. Background Art

[0002] At present, all domestic shortwave communication system adaptive shortwave radios use asynchronous methods to call and establish links. When idle, the system asynchronously scans the current frequency group. When calling, in order for the calling party to make the called party hear the calling tone, the duration of the calling tone is generally greater than the scanning period of the other party. The calling tone lengthens as the number of scanned channels increases. Sending too many calling tones with obvious features is easily detected and interfered by the enemy, while sending too few calling tones may not find a good communication frequency for the channel. Therefore, there is an urgent need to design an adaptive link establishment method to solve the problems of too long link establishment time and poor link establishment effect in the shortwave communication system. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for rapid adaptive link establishment in shortwave communication that can improve the link establishment speed of shortwave communication, reduce the exposure time of shortwave transmitted call signals, improve communication confidentiality, prevent human interference, and improve the reliability of data communication.

[0004] The technical solution for achieving the purpose of the present invention is as follows: A method for rapid adaptive link establishment in shortwave communication includes the following steps:

[0005] Step 1: Divide time slots into four types of time slots: protection time slot, call time slot, response time slot, and confirmation time slot;

[0006] Step 2: Pre-store the frequency patterns of each communication object in all synchronization devices, as well as the mapping function of frequency f, address a, and time t: f = φ(a,t);

[0007] Step 3: When a user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the response frame of the called party in the response time slot after sending the call frame. If no response frame is received, the called party is called again in the next call time slot;

[0008] Step 4: When the called party receives the call signal, it determines whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send;

[0009] Step 5: When the calling party receives the response signal of the called party, it determines whether the local signal quality is greater than the frequency selection threshold. If it is greater than the frequency selection threshold, it sends a confirmation frame; otherwise, it does not send;

[0010] Step 6: If the called party does not receive the confirmation frame, it enters the next channel.

[0011] Further, the time slots in step 1 are divided into four types: protection time slot, call time slot, response time slot, and confirmation time slot, which are specifically as follows:

[0012] The duration of the protection time slot is t 0 , which can be determined according to the radio transceiver conversion time and is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio;

[0013] The call time slot is the time slot used for sending the call PDU, and its duration is t 1 , which is used for sending the call PDU;

[0014] The response time slot is the time slot used for sending the response PDU after receiving the call, and its duration is t 1 , which is used for sending the PDU response;

[0015] The confirmation time slot is the time slot used for the master calling party to resume the confirmation PUD after receiving the response from the called party, and its duration is t 1 , which is used for sending the confirmation PDU.

[0016] Further, a protection time slot is set before each of the call time slot, response time slot, and confirmation time slot, which is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio.

[0017] Further, the residence time t of the call signal sent by the master calling party on each channel is: s It is:

[0018]

[0019] The shortest link establishment time in the best case is:

[0020]

[0021] The shortest link establishment time in the worst case is:

[0022]

[0023] where n is the number of times the call is not answered.

[0024] A short-wave communication fast adaptive link establishment system is used to implement the short-wave communication fast adaptive link establishment method described above. The system includes a first module to a sixth module, and the functions of each module are specifically as follows:

[0025] The first module divides the time slots into four types: protection time slot, call time slot, response time slot, and confirmation time slot;

[0026] The second module pre-stores the frequency patterns of each communication object, as well as the mapping function of frequency f, address a, and time t: f = φ(a,t) in all synchronization devices;

[0027] The third module: When the user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the response frame of the called party in the response time slot after sending the call frame. If no response frame is received, the called party is called again in the next call time slot.

[0028] The fourth module: When the called party receives the call signal, it judges whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send.

[0029] The fifth module: When the calling party receives the response signal of the called party, it judges whether the local signal quality is greater than the frequency selection threshold. If it is greater than the frequency selection threshold, it sends an acknowledgement frame; otherwise, it does not send.

[0030] The sixth module: If the called party does not receive the acknowledgement frame, it enters the next channel.

[0031] A mobile terminal includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the fast adaptive link establishment method for shortwave communication described above is implemented.

[0032] A computer-readable storage medium stores a computer program thereon. When the program is executed by a processor, the steps in the fast adaptive link establishment method for shortwave communication are implemented.

[0033] Compared with the prior art, the present invention has the following remarkable advantages: (1) It improves the link establishment speed of shortwave communication, reduces the exposure time of shortwave transmitted call signals, is beneficial to communication secrecy, prevents man-made interference, and improves the reliability of data communication; (2) By adopting an adaptive link establishment method, it solves the problems that too many call tones with obvious characteristics are easily detected and interfered by the enemy and the poor channel communication frequency adaptability caused by too few call tones, and improves the efficiency of shortwave communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic flow chart of a fast adaptive link establishment method for shortwave communication according to the present invention.

[0035] Figure 2 It is a schematic structural diagram of time slot division in the present invention.

[0036] Figure 3 It is a schematic structural diagram of time slot combination in the present invention DETAILED DESCRIPTION OF THE INVENTION

[0037] It is easy to understand that, according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can imagine various implementation manners of the present invention. Therefore, the following specific implementation manners and drawings are only illustrative descriptions of the technical solution of the present invention, and should not be regarded as all of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present invention or its application or use.

[0040] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0041] In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0042] The present invention provides a method for rapid adaptive link establishment in short-wave communication, including the following steps:

[0043] Step 1: Divide time slots into four types: protection time slot, call time slot, response time slot, and confirmation time slot;

[0044] Step 2: Pre-store the frequency patterns of each communication object, as well as the mapping function of frequency f, address a, and time t in all synchronization devices: f = φ(a,t);

[0045] Step 3: When a user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the response frame of the called party in the response time slot after sending the call frame. If no response frame is received, the called party is called repeatedly in the next call time slot;

[0046] Step 4: When the called party receives the call signal, it judges whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send;

[0047] Step 5: When the calling party receives the response signal of the called party, it judges whether the local signal quality is greater than the frequency selection threshold. If it is greater than the frequency selection threshold, it sends a confirmation frame; otherwise, it does not send;

[0048] Step 6: If the called party does not receive the confirmation frame, it enters the next channel.

[0049] As a specific example, the time slots in Step 1 are divided into four types: protection time slot, call time slot, response time slot, and confirmation time slot, which are specifically as follows:

[0050] The duration of the protection time slot is t 0 , which can be determined according to the radio transceiver conversion time and is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio;

[0051] The call time slot is the time slot used for sending the call PDU, and its duration is t 1 , which is used for sending the call PDU;

[0052] The response time slot is the time slot used for sending the response PDU after receiving the call, and its duration is t 1 , which is used for sending the PDU response;

[0053] The confirmation time slot is the time slot used for the master call party to resume the confirmation PUD after receiving the response from the called party, and its duration is t 1 , which is used for sending the confirmation PDU.

[0054] As a specific example, a protection time slot is set before each of the call time slot, response time slot, and confirmation time slot, which is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio.

[0055] As a specific example, the residence time t of the call signal sent by the master call party in each channel is: s For:

[0056]

[0057] The shortest link establishment time in the best case is:

[0058]

[0059] The shortest link establishment time in the worst case is:

[0060]

[0061] Where n is the number of times the call is not responded to.

[0062] The present invention also provides a short-wave communication fast adaptive link establishment system, which is used to implement the short-wave communication fast adaptive link establishment method. The system includes a first module to a sixth module, and the functions of each module are specifically as follows:

[0063] The first module divides the time slots into four types: protection time slot, call time slot, response time slot, and confirmation time slot;

[0064] The second module pre-stores the frequency patterns of each communication object, as well as the mapping function of frequency f, address a, and time t: f = φ(a, t) in all synchronization devices;

[0065] The third module, when the user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the response frame of the called party in the response time slot after sending the call frame. If no response frame is received, the called party is called again in the next call time slot;

[0066] The fourth module, when the called party receives the call signal, determines whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send;

[0067] The fifth module, when the calling party receives the response signal of the called party, determines whether the local signal quality is greater than the frequency selection threshold. If it is greater than the frequency selection threshold, it sends an acknowledgment frame; otherwise, it does not send;

[0068] The sixth module, if the called party does not receive the acknowledgment frame, enters the next channel.

[0069] The present invention also provides a mobile terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the fast adaptive link establishment method for short-wave communication is implemented.

[0070] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps in the fast adaptive link establishment method for short-wave communication are implemented.

[0071] The following combines the drawings and specific embodiments to further elaborate on the present invention in detail.

[0072] Embodiment

[0073] As Figure 1 shown, a fast adaptive link establishment method for short-wave communication according to the present invention includes the following steps:

[0074] Step 1: Divide the time slot into four types of time slots: protection time slot, call time slot, response time slot, and acknowledgment time slot;

[0075] Step 2: Pre-store the frequency patterns of each communication object, as well as the mapping function f = φ(a, t) of frequency f, address a, and time t in all synchronization devices;

[0076] Step 3: When the user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the response frame of the called party in the response time slot after sending the call frame. If no response frame is received, the called party is called again in the next call time slot;

[0077] Step 4: After the called party receives the call signal, it determines whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends an answer frame to the calling party; otherwise, it does not send.

[0078] Step 5: After the calling party receives the answer signal from the called party, it determines whether the local signal quality is greater than the frequency selection threshold. If it is greater than the frequency selection threshold, it sends an acknowledgement frame; otherwise, it does not send.

[0079] Step 6: If the called party does not receive the acknowledgement frame, it enters the next channel.

[0080] As a specific example, the time slots in Step 1 are divided into four types: protection time slot, call time slot, answer time slot, and acknowledgement time slot, as Figure 2 shown below:

[0081] The duration of the protection time slot is t 0 , which can be determined according to the radio transceiver conversion time and is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio.

[0082] The call time slot is the time slot used to send the call PDU, and its duration is t 1 , which is used to send the call PDU.

[0083] The answer time slot is the time slot used to send the answer PDU after receiving the call, and its duration is t 1 , which is used to send the PDU answer.

[0084] The acknowledgement time slot is the time slot used by the calling party to send the acknowledgement PUD after receiving the answer from the called party, and its duration is t 1 , which is used to send the acknowledgement PDU.

[0085] As a specific example, a protection time slot is set before each of the call time slot, answer time slot, and acknowledgement time slot, which is used for the frequency conversion and receive / transmit, transmit / receive conversion of the radio.

[0086] As a specific example, as Figure 3 shown, the residence time of the call signal sent by the calling party in the call time slot is:

[0087]

[0088] The residence time in the answer time slot is:

[0089]

[0090] The residence time in the acknowledgement time slot is:

[0091]

[0092] The residence time t of the call signal on each channel s is as follows:

[0093]

[0094] Therefore, the shortest link establishment time in the best case is:

[0095]

[0096] The shortest link establishment time in the worst case is:

[0097]

[0098] where n is the number of times the call is not answered.

[0099] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A shortwave communication fast adaptive link establishment method, characterized in that: The following steps are involved: Step 1: Divide the time slot into four types: protection time slot, call time slot, answer time slot, and confirmation time slot; Step 2: pre-store the frequency pattern of each communication object in all synchronization devices, as well as the mapping function of frequency f, address a and time t: f =φ(a,t); Step 3: When the user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the called party's response frame in the response time slot after sending the call frame. If no response frame is received, the calling party is called again in the next call time slot; Step 4: After receiving the call signal, the called party determines whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send a response frame. Step 5: After receiving the response signal from the called party, the calling party determines whether the local signal quality is greater than the frequency selection threshold. If so, a confirmation frame is sent; otherwise, no confirmation frame is sent. Step 6: If the called party does not receive the confirmation frame, it enters the next channel.

2. The shortwave communication fast adaptive link establishment method according to claim 1, characterized in that: The time slots described in step 1 are divided into four types: protection time slots, call time slots, answer time slots, and confirmation time slots, as follows: The protection time slot duration is t0, which can be established according to the radio station's transceiver conversion time and is used for the radio station's frequency change and receive / transmit, transmit / receive conversion; The call time slot is a time slot used for sending a call PDU, with a duration of t1, and is used for sending a call PDU; The response time slot is the time slot used to send the response PDU after receiving the call, with a duration of t1, and is used to send the PDU response; The confirmation time slot is a time slot used by the calling party to restore the confirmation PDU after receiving the response from the called party. The duration is t1 and is used to send the confirmation PDU.

3. The shortwave communication fast adaptive link establishment method according to claim 2, characterized in that: A protection time slot is set before the calling time slot, the answering time slot and the confirmation time slot, which is used for frequency switching and receiving / transmitting, transmitting / receiving conversion of the radio station.

4. The shortwave communication fast adaptive link establishment method according to claim 3, characterized in that: The calling signal sent by the calling party stays in each channel for a time t s for: ； The shortest link building time in the best case is: ； The worst case minimum link establishment time is: ； Here, n is the number of unanswered calls.

5. A shortwave communication fast adaptive link establishment system, characterized in that: The system is used to implement the shortwave communication fast adaptive link establishment method according to any one of claims 1 to 4, and the system includes a first module to a sixth module, wherein the functions of each module are as follows: The first module divides the time slot into four types: protection time slot, call time slot, answer time slot, and confirmation time slot; The second module pre-stores the frequency pattern of each communication object in all synchronization devices, as well as the mapping function of frequency f, address a and time t: f =φ(a,t); In the third module, when the user needs to establish a link, the calling party calculates the channel of the called party in this time slot, sends a call frame in this time slot, and waits for the called party's response frame in the response time slot after sending the call frame. If no response frame is received, the calling party is called again in the next call time slot; The fourth module, when the called party receives the call signal, determines whether the local signal quality is greater than the frequency selection threshold. If it exceeds the frequency selection threshold, it sends a response frame to the calling party; otherwise, it does not send; The fifth module, when the calling party receives the answering signal from the called party, determines whether the local signal quality is greater than the frequency selection threshold, and sends a confirmation frame if it is greater than the frequency selection threshold; otherwise, it does not send; In the sixth module, if the called party does not receive the confirmation frame, it enters the next channel.

6. A mobile terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the shortwave communication fast adaptive link establishment method as described in any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, the steps in the shortwave communication fast adaptive link establishment method as described in any one of claims 1 to 4 are implemented.

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