An in-aircraft communication device and a call establishment method

Abstract

The present invention relates to the technical field of interphone, and particularly relates to a call establishment method for an in-flight interphone device. The method of the present invention solves the defects of occasional call establishment failure and misjudgment of non-established call as passive call establishment, and improves the reliability of call establishment and communication for the aircraft crew; it can effectively avoid the problem of abnormal call establishment response caused by misoperation and high-frequency disconnection and reconnection of the call, and improves the communication stability.

Description

Technical Field

[0001] The present invention relates to the technical field of interphone, and particularly relates to an in-flight interphone device and a call establishment method. Background Art

[0002] For an aircraft performing a mission, the pilot (captain) in the front cabin and other crew members must communicate with the mission crew members (commanding officer) in the rear cabin by using an interphone device, so as to ensure information sharing between the front and rear cabins and successfully complete the flight mission. At this time, an efficient and reliable call establishment method is required. If the call establishment is unstable, resulting in intermittent calls, or in an emergency state, the requirement for the communication establishment time limit cannot be met, which will greatly affect the normal voice communication between the front cabin personnel and the rear cabin personnel. Therefore, the crew call establishment technology is a very critical link in aircraft voice communication.

[0003] In the traditional call establishment method, when one party of the carrier aircraft or the mission actively performs a call establishment / disconnection operation, the other party receives the call establishment / disconnection status word and immediately responds and answers. The call establishment / disconnection method is as follows:

[0004] 1. Process of the rear cabin mission interphone actively establishing a call:

[0005] a) By default (i.e., in the non-call-established state), the rear cabin mission interphone initiates a call establishment request and sends a call establishment status 1 event processing) to the front cabin carrier aircraft interphone;

[0006] b) After receiving the call establishment status of the mission, the front cabin carrier aircraft interphone immediately replies with a call establishment response status to the mission interphone (periodic reply);

[0007] c) When one party of the carrier aircraft interphone and the mission interphone ends the call, it sends a disconnection status word to the other party, and the other party responds to the disconnection status word after receiving it (periodically sent).

[0008] 2. The process of the front cabin carrier aircraft actively establishing a call is similar to that of the rear cabin mission.

[0009] Since the communication transmission of the call establishment / disconnection status data between the front cabin carrier aircraft interphone and the rear cabin mission interphone takes time (about 60 ms according to software architecture analysis), if the mission interphone does not receive the call establishment response status replied by the carrier aircraft interphone within the designed response period after sending the call establishment status, the call establishment will fail; however, if the call establishment response status of the carrier aircraft interphone is received after exceeding the designed response period, it will be misjudged as a passive call establishment. Therefore, this call establishment method has defects such as occasional call establishment failure and misjudgment of non-call-established as passive call establishment. Summary of the Invention

[0010] In view of the problems existing in the prior art, the purpose of the present invention is to provide an in-flight communication device and a call establishment method for an aircraft.

[0011] To achieve the above object, the present invention adopts the following technical solutions.

[0012] (1) A call establishment method for an in-flight communication device of an aircraft. The in-flight communication device includes a front cabin carrier in-flight communication device and a rear cabin mission in-flight communication device. The call establishment method includes the following steps:

[0013] Step 1: Set an active call establishment flag word, an active call disconnection flag word, and a passive call establishment flag word for the front cabin carrier in-flight communication device and the rear cabin mission in-flight communication device respectively, and initialize them to 0.

[0014] Step 2: After one party of the front cabin carrier in-flight communication device or the rear cabin mission in-flight communication device actively initiates a call establishment, continuously send call establishment status information to the other party; each time the call establishment status information is sent, the active call establishment flag word is incremented by 1.

[0015] Step 3: When the call establishment recipient receives the call establishment status information, the call establishment recipient sets the passive call establishment flag word to 1, stops receiving the call establishment status information, and continuously sends call establishment response information to the call establishment initiator until the call establishment is completed.

[0016] Step 4: When the active call establishment flag word of the call establishment initiator is greater than N, the call establishment initiator starts to receive the call establishment response information from the other party and completes the call establishment.

[0017] Step 5: During the call establishment process, after one party of the front cabin carrier in-flight communication device or the rear cabin mission in-flight communication device actively initiates a call disconnection, continuously send call disconnection status information to the other party; each time the call disconnection status information is sent, the active call disconnection flag word is incremented by 1.

[0018] Step 6: When the call disconnection recipient receives the call disconnection status information, the call disconnection recipient sets the passive call establishment flag word to 0, stops receiving the call disconnection status information, and continuously sends call disconnection response information to the call disconnection initiator until the call disconnection is completed.

[0019] Step 7: When the active call disconnection flag word of the call disconnection initiator is greater than N, the call disconnection initiator starts to receive the call disconnection response information from the other party and completes the call disconnection.

[0020] (2) An in-flight communication device for an aircraft, used to implement the above call establishment method, including a processing module, a decision-making module, and a display module; the processing module is used to send and receive call establishment status information, call disconnection status information, call establishment response information, and call disconnection response information, and complete call establishment or call disconnection; the decision-making module stores multiple status words and is used to control the processing module to complete call establishment or call disconnection according to the status words; the display module is used to display the status of each status word in the decision-making module.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: it solves the defects of occasional failure in establishing a link and misjudging the unestablished link as a passive link establishment, and improves the reliability of the link establishment for the aircraft group to make a call; it can effectively avoid the abnormal link establishment response problems caused by misoperations and high-frequency disconnection and reconnection of the link, and improves the communication stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a schematic flow chart of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The embodiments of the present invention will be described in detail below. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0025] Referring to Figure 1 , a method for establishing a call link of an in-aircraft communication device. The in-aircraft communication device includes a forward cabin carrier in-aircraft communication device and a rear cabin mission in-aircraft communication device. The link establishment method includes the following steps:

[0026] Step 1: Set an active link establishment flag word, an active link disconnection flag word, and a passive link establishment flag word for the forward cabin carrier in-aircraft communication device and the rear cabin mission in-aircraft communication device respectively, and initialize them to 0;

[0027] Step 2: After one party of the forward cabin carrier in-aircraft communication device or the rear cabin mission in-aircraft communication device actively initiates link establishment, continuously send link establishment status information to the other party; each time the link establishment status information is sent, the active link establishment flag word is incremented by 1;

[0028] Step 3: When the link establishment recipient receives the link establishment status information, the link establishment recipient sets the passive link establishment flag word to 1, stops receiving the link establishment status information, and continuously sends link establishment response information to the link establishment initiator until the link establishment is completed;

[0029] Step 4: When the active link establishment flag word of the link establishment initiator is greater than N, the link establishment initiator starts to receive the link establishment response information from the other party and completes the link establishment;

[0030] Step 5: During the link establishment process, after one party of the forward cabin carrier in-aircraft communication device or the rear cabin mission in-aircraft communication device actively initiates link disconnection, continuously send link disconnection status information to the other party; each time the link disconnection status information is sent, the active link disconnection flag word is incremented by 1;

[0031] Step 6. After receiving the chain disconnection status information, the chain disconnection recipient sets the passive link establishment flag word to 0, stops receiving the chain disconnection status information, and continuously sends chain disconnection response information to the chain disconnection initiator until the chain disconnection is completed;

[0032] Step 7. When the active chain disconnection flag word of the chain disconnection initiator is greater than N, the chain disconnection initiator starts to receive the chain disconnection response information from the other party and completes the chain disconnection.

[0033] After the flag word of the link establishment / chain disconnection initiator is greater than N, the link establishment / chain disconnection initiator starts to receive the link establishment / chain disconnection response information from the other party, and the link establishment / chain disconnection recipient stops receiving the link establishment status information or the chain disconnection status information by changing the passive link establishment flag word, avoiding the problem that due to the misoperation of the in-aircraft communication device of one party or the high-frequency link establishment and disconnection, the in-aircraft communication devices of both parties obtain incorrect flag words, resulting in misjudgment of the in-aircraft communication device and finally errors.

[0034] Further, the value of N satisfies N·t 1 >>t 2 ;

[0035] wherein, t 1 is the time required for the link establishment / chain disconnection initiator to send a link establishment status information or a chain disconnection status information once, and t 2 is the time required for the link establishment status information or the chain disconnection status information to be communicated and transmitted between the sending and receiving parties.

[0036] N·t 1 is at least 5 times of t 2 but should not be too large, so as to avoid an uncertain state during link establishment or chain disconnection while ensuring that the time for link establishment or chain disconnection is not too long.

[0037] In addition, an in-aircraft communication device is used to implement the above link establishment method, including a processing module, a decision module and a display module; the processing module is used to send and receive link establishment status information, chain disconnection status information, link establishment response information and chain disconnection response information, and complete link establishment or chain disconnection; the decision module stores multiple status words and is used to control the processing module to complete link establishment or chain disconnection according to the status words; the display module is used to display the status of each status word in the decision module to prompt the user.

[0038] Although the present invention has been described in detail with general descriptions and specific embodiments in this specification, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. A call establishment method for an in-aircraft communication device. The in-aircraft communication device includes a forward-cabin carrier in-aircraft communication device and a rear-cabin mission in-aircraft communication device. Characterized in that, The call establishment method includes the following steps: Step 1, set an active call establishment flag word, an active call disconnection flag word, and a passive call establishment flag word for the forward-cabin carrier in-aircraft communication device and the rear-cabin mission in-aircraft communication device respectively, and initialize them to 0; Step 2, after one party of the forward-cabin carrier in-aircraft communication device or the rear-cabin mission in-aircraft communication device actively initiates a call establishment, continuously send call establishment status information to the other party; each time the call establishment status information is sent, the active call establishment flag word is incremented by 1; Step 3, when the call establishment receiving party receives the call establishment status information, the call establishment receiving party sets the passive call establishment flag word to 1, stops receiving the call establishment status information, and continuously sends call establishment response information to the call establishment initiating party until the call establishment is completed; Step 4, when the active call establishment flag word of the call establishment initiating party is greater than N, the call establishment initiating party starts to receive the call establishment response information from the other party and completes the call establishment; Step 5, during the call establishment process, after one party of the forward-cabin carrier in-aircraft communication device or the rear-cabin mission in-aircraft communication device actively initiates a call disconnection, continuously send call disconnection status information to the other party; each time the call disconnection status information is sent, the active call disconnection flag word is incremented by 1; Step 6, when the call disconnection receiving party receives the call disconnection status information, the call disconnection receiving party sets the passive call establishment flag word to 0, stops receiving the call disconnection status information, and continuously sends call disconnection response information to the call disconnection initiating party until the call disconnection is completed; Step 7, when the active call disconnection flag word of the call disconnection initiating party is greater than N, the call disconnection initiating party starts to receive the call disconnection response information from the other party and completes the call disconnection; The value of N satisfies N·t 1 ≥5 t 2 ; where t 1 is the time required for the initiator of link establishment or link disconnection to send a link establishment status message or a link disconnection status message once, and t 2 is the time required for the communication transmission of the link establishment status message or the link disconnection status message between the sender and the receiver.

2. An in-aircraft communication device for implementing the call establishment method described in claim 1. Characterized in that, It includes a processing module, a decision-making module, and a display module; the processing module is used to send and receive call establishment status information, call disconnection status information, call establishment response information, and call disconnection response information, and complete call establishment or call disconnection; the decision-making module stores multiple status words and is used to control the processing module to complete call establishment or call disconnection according to the status words; the display module is used to display the status of each status word in the decision-making module.

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