CN108668240B

CN108668240B - Method for changing transmission mode or transmission mode in voice preferred system

Info

Publication number: CN108668240B
Application number: CN201810978354.1A
Authority: CN
Inventors: 赵巍; 武东宏; 纪国桢
Original assignee: Beijing Softengin Technology Co ltd
Current assignee: Beijing Softengin Technology Co ltd
Priority date: 2018-08-27
Filing date: 2018-08-27
Publication date: 2021-09-17
Anticipated expiration: 2038-08-27
Also published as: CN108668240A

Abstract

The invention discloses a method for changing an operation mode by continuously pressing a PTT button by a controller in an air-ground communication voice preference system, in particular a method for changing a sending mode or a sending mode. The key point is that after a controller presses a PTT key, the PTT key is quickly lifted; the controller then quickly presses the PTT button a second time, and the voice preferred system immediately changes the transmission mode or transmission mode when receiving the PTT signal generated by the above operation. By using the technical scheme of the invention, the voice tracking using group calling mode can be ended in advance under the control of the controller in the voice preferred system, and the time interval between the controller and the air conversation is shortened.

Description

Method for changing transmission mode or transmission mode in voice preferred system

Technical Field

The invention relates to the field of aviation ground-air communication, in particular to a method for changing a transmission mode or a transmission mode through the operation of a controller in a ground-air communication voice optimization system.

Background

Air-ground-air voice communication is one of the key links in implementing air-ground-air traffic control. Ground controllers communicate voice with the air plane through voice switching and control systems, transmission equipment, very high frequency radios, and the like. Voice switching and control systems, also referred to in the industry as intercom systems.

In order to provide sufficient radio signal coverage in the used space domain and ensure the safety and smoothness of ground-air communication, a plurality of radio stations are generally arranged at a very high frequency point. Each station accesses a corresponding signal path of the intercom system via a transmission link. To ensure voice quality, the preferred technique for speech signals in voice over air communications has emerged. The main functions of the optimization technology are to measure the voice signals received by a plurality of receivers in real time through an optimization algorithm, select the optimal signals and realize the receiving of the optimal signals by a controller. Another major function of the preferred technology is the control of the controller's voice transmission to enable the controller to transmit voice to all or the best stations.

The optimal technology can be used in an internal speech system to form a voice optimal subsystem, such as a VCS 3020X internal speech system of FreQUENTIS of Austria adopted in the air traffic control system of China at present. The optimized technology can be used independently of the exterior of the telephone system and used as accessory equipment of the telephone system, such as the SCV-200 signal comparator of Beijing Soonan Videon, the SNV-12 signal comparator of American Reynaud company and other equipment adopted by the air traffic control system in China at present. In the invention, the application forms of the two voice preference technologies are both called voice preference systems; the part of the voice preference system responsible for transmission control is referred to as the transmission control module.

In the telephone system, a controller performs voice reception and transmission by operating a console. A called unit with a PTT button (Push To Talk) is provided on the controller console. The receiving and sending unit comprises an independent microphone with a PTT key, and can also consist of an independent PTT key and an earphone microphone set on the console. When the controller speaks when pressing the PTT button, the called unit sends a PTT signal 200 and an audio signal to the voice preference system via the interface circuit of the internal phone system, the voice switch, etc. When the PTT signal 200 is active, the voice preference system sends an active status PTT output signal to the radio via the transmission link, transmitting the controller's voice into the air towards the area covered by the radio. When the controller releases the PTT button, the PTT signal 200 is deactivated, and the voice preferred system sends an inactive PTT output signal to the radio station via the transmission link, and the radio station stops transmitting, a process known as voice transmission, or simply transmission.

According to the standard regulation of civil aviation industry in China, the internal speech system adopting the optimized technology has two voice sending modes of group calling and tracking. In the group call mode, all the accessed stations of the voice preferred system are used as transmitting standby stations to transmit to all the stations. When a group call is made by using a plurality of radio stations, the same frequency interference exists, and the voice heard by the pilot is cloudy. To reduce the impact of co-channel interference, a tracking mode is required. The tracking mode is to use the station with the best receiving effect at the latest time, which is preferably selected, as the transmitting backup station to carry out the call.

In the group call mode, each voice transmission of the controller is in the group call mode, that is, the voice is transmitted through all the radio stations accessed by the voice preference system.

When the tracking mode is adopted, a controller adopts a group calling mode when sending for the first time, and voice is sent by all radio stations. The best radio station can be obtained only through one-time reception of the air signals; the controller uses the tracking method, i.e. transmits to the best station only, if it transmits again in a short time after the best station finishes receiving. In the tracking mode setting, a tracking mode holding time parameter is included, and in actual use, the setting is generally several seconds. When the tracking mode is adopted, as long as the controller sends again in the set interval of the holding time after the latest receiving time, the sending uses the tracking mode; if the sending is not carried out again in the holding time interval, the system automatically enters the group calling mode when the end of the holding time is reached.

Referring to fig. 1, in the prior art, a voice preferred system implements voice transmission control in this manner. In a transmission control module of a voice preference system, an input unit 101 receives a PTT signal 200 and a voice signal originating from a talker of a controller console; the PTT signal 200 and the voice signal are sent to the output unit 102. The transmission mode control unit 103 pre-stores the transmission mode and tracking mode holding time setting parameters transmitted from the voice preferred system setting module; the signal preference module of the voice preference system receives the best station number from the best station at the end of the best station reception. If the group call mode is set, transmission mode control section 103 sets the group call mode to output section 102. If the tracking mode is set, the transmission mode control unit 103 sets a group call mode or a tracking mode to the output unit 102 according to whether an optimal station is selected and whether a time difference from the last time of receiving the optimal station to the current time exceeds a set tracking mode holding time; when the radio station is sent for the first time, the best radio station is not available, and the radio station is set to be in a group calling mode; if not, setting the tracking mode; if time out, it is set as group calling mode.

An output unit 102 converting the PTT signal 200 from the input unit 101 into a PTT output signal; and determining a channel to be output according to the set current sending mode and the optimal radio station number, and opening a gating switch of the channel to be output. Outputting audio and PTT output signals to the gated channel when the PTT signal 200 becomes active; when the PTT signal 200 becomes inactive, transmission is stopped. The PTT output signal is logically identical to PTT signal 200, but is converted to a form that matches the transmitting device.

In the prior art, the transmission mode and related parameters are preset before use, and cannot be changed by a controller during a call. In the terminal and the near area, the frequency of the ground-air conversation is high. It is therefore often the case that when a controller finishes transmitting with an aircraft that is voice tracked using a voice tracking mode setting, it is desirable to talk to another aircraft immediately, i.e., to enter broadcast mode immediately. And in the time interval of keeping the time parameter setting, the tracking mode is not finished, and the transmitted voice can only be received by the previous airplane and can not be received by other airplanes. If the time interval exceeds the holding time parameter setting and the system enters the broadcast mode to transmit, valuable talk time is wasted. In a busy terminal and a near area, excessive waiting even causes a controller to finish a scheduled call in a specified time, so that the spirit is highly tense, and accident potential is easy to form.

Disclosure of Invention

In view of the above, the present invention aims to provide a method for changing a transmission mode or a transmission mode by a controller by continuously pressing a PTT button in an air-ground communication voice preference system. By using the technical scheme of the invention, the voice optimization system can end the tracking mode in advance to enter the group calling mode under the control of the controller, thereby shortening the communication time interval of the controller, reducing the working intensity and ensuring the flight safety.

In order to achieve the above object, the technical solution of the present invention is achieved as follows.

A method for changing an operating mode in an air-to-ground voice communication preferred system, comprising the steps of,

a. the controller quickly lifts up after pressing the PTT key;

b. the controller then quickly presses the PTT button a second time;

c. the voice preferred system immediately changes the operating mode when it receives the PTT signal 200 generated by all of the above operations.

Further, the operation mode is changed, including changing the transmission mode or changing the transmission mode.

Further, the method for changing the sending mode comprises the following steps,

a. the PTT signal detection unit 104 detects the PTT signal 200 transmitted from the input unit 101, and records the time when the PTT signal 200 changes from invalid to valid and from valid to invalid;

b. the PTT signal detection unit 104 detects whether there is a so-called PTT double click signal in which "PTT becomes inactive after being temporarily active and then quickly becomes active again" in the PTT signal 200; if the PTT double-click signal is present, immediately sending a message of "PTT double-click signal detected" to the transmission mode control unit 103;

c. when receiving the PTT double click signal detection message, the transmission mode control unit 103 keeps the transmission mode unchanged, immediately sets the transmission mode to the group transmission mode, and sets the output unit 102 to the group transmission mode;

d. output section 102 starts transmission when PTT signal 200 is active and stops transmission when PTT signal 200 is inactive, according to the set transmission scheme.

Further, the method for changing the transmission mode comprises the following steps,

c. when the sending mode control unit 103 receives the PTT double-click signal detection message, if the current sending mode is the tracking mode, the sending mode is immediately set to the group call mode; if the current sending mode is the group calling mode, immediately setting the sending mode as the tracking mode; meanwhile, the output unit 102 is set to be in a mass sending mode;

Preferably, in the PTT double click signal, an absolute value 201 of a difference between a time 204 when the PTT signal 200 is activated and a time when the PTT signal 200 is deactivated is between 30ms and 800 ms.

Preferably, the absolute value 202 of the difference between the time when the first PTT signal 200 becomes active and then becomes inactive and the time 205 when the second PTT signal 200 becomes active immediately thereafter is between 30ms and 800ms in the PTT double click signal.

Preferably, the absolute value 203 of the difference between the time 204 when the first PTT signal 200 becomes active and the time 205 when the second PTT signal 200 becomes active immediately thereafter is between 200ms and 1200ms in the PTT double click signal.

By the method for setting the sending mode as the group sending mode, when the sending mode of the voice preferred system is set as the tracking mode, once the voice preferred system detects the PTT double-click signal, the PTT is sent by adopting the broadcasting mode when the second PTT is effective 205, and then the tracking mode is still used. When the method for changing the sending mode by using the technical scheme of the invention is used, when the voice preference system detects the PTT double-click signal, the system is switched between the tracking mode and the group calling mode, and the aims of immediately using the group sending mode when a controller needs and immediately using the tracking mode when the controller needs can also be achieved.

The two methods can realize a mode of rapidly ending the tracking without waiting, so that a controller can immediately make a group call through all radio stations, and the condition that the timely communication with other airplanes except the tracked airplane is missed is avoided.

Drawings

FIG. 1 is a schematic diagram of a prior art transmission control module of a voice preferred system;

FIG. 2 is a timing diagram of the PTT double click signal of the present invention;

FIG. 3 is a schematic diagram of the configuration of the transmission control module of the voice preferred system of the present invention;

FIG. 4 is a schematic flow chart of a first embodiment of the present invention;

FIG. 5 is a schematic flow chart of a second embodiment of the present invention.

Detailed Description

The invention is further described in detail below with reference to the drawings and the specific embodiments.

Fig. 3 is a schematic structural diagram of a transmission control module of a voice preferred system according to the technical solution of the present invention. The voice preference system transmission control module comprises an input unit 101, a PTT signal detection unit 104, a transmission mode control unit 103 and an output unit 102.

The input unit 101 receives a PTT signal 200 and a voice signal originating from a controller console receiver, sends the PTT signal 200 and the voice signal to the output unit 102, and sends the PTT signal 200 to the PTT detecting unit with a delay of 20 ms. The effect of delaying the PTT signal 200 is to set the transmission mode of the output unit 102 before the PTT output signal becomes active, so as to avoid changing the transmission mode during the time the PTT output signal is active. The delay time needs to be adjusted according to actual conditions. The delay to the PTT signal 200 can be further reduced if the transmit control module is running fast enough.

The PTT detection unit detects the PTT signal 200 and records the time when the PTT signal 200 changes from invalid to valid and from valid to invalid; detecting whether there is a PTT double click signal in the PTT signal 200 where PTT becomes inactive after being briefly active and then quickly becomes active again; if the PTT double click signal is present, a message "PTT double click detected" is sent to the transmission mode control unit 103. The detection parameters of the PTT double click signal used by the PTT signal detection unit include,

the absolute value 201 of the difference between the time when the first PTT signal becomes effective and the time when the PTT signal becomes ineffective is between 50ms and 500 ms;

the absolute value 202 of the difference between the time when the first PTT signal becomes effective and then becomes ineffective and the time when the second PTT signal immediately follows becomes effective is between 50ms and 700 ms;

the absolute value 203 of the difference between the time when the first PTT signal becomes active and the time when the second PTT signal becomes active immediately thereafter is 300ms to 1000 ms.

The transmission mode control unit 103 holds in advance the transmission mode setting and tracking mode holding time parameter transmitted from the voice preferred system setting unit; receiving the best radio station number transmitted by a signal preference module of the voice preference system when the best radio station receiving is finished; it is checked whether a message that a PTT double click signal is detected is received. When receiving the message of detecting the PTT double click signal, the transmission mode and the transmission mode are determined, and output section 102 is set with the current transmission mode and the best station number. In the first embodiment, if a message of detecting a PTT double click signal is received, the current transmission mode is kept unchanged, and the output unit 102 is set in a group call manner and an optimal station number. In the second embodiment, if a message that a PTT double click signal is detected is received, a new transmission mode is set; the current transmission mode is determined, and output section 102 is set in the group call mode and the optimum station number.

An output unit 102 converting the PTT signal 200 from the input unit 101 into a PTT output signal; and determining a channel to be output according to the set current sending mode and the optimal radio station number, and opening a gating switch of the channel to be output. Outputting audio and PTT output signals to the gated channel when the PTT signal 200 becomes active; when the PTT signal 200 becomes inactive, transmission is stopped.

The following describes the implementation of the present invention with reference to fig. 4 and 5.

Fig. 4 is a schematic flow chart of the first embodiment of the present invention.

Step 401, the sending mode control unit judges whether the setting is a group calling mode, if so, step 408 is executed; if not, step 402 is performed.

In step 402, the transmission mode control section sets the group call mode to the output section, and then executes step 403.

In step 403, the transmission mode control unit detects whether the best station number is received from the preferred module of the voice preferred system. If so, go to step 404; if not, go to step 403.

Step 404, the sending mode control unit sets a tracking mode to the output unit, including sending information of the optimal station number to the output unit; and starting timing. Step 405 is then performed.

In step 405, the transmission mode control unit determines whether the current count exceeds the holding time. If yes, go to step 407; if not, step 406 is performed.

Step 406, the transmission mode control unit detects whether a message of detecting the PTT double click signal transmitted from the PTT signal detection unit is received. If yes, go to step 407; if not, step 405 is performed.

In step 407, the transmission mode control section sets the group call mode to the output section, and then executes step 403.

In step 408, the transmission mode control section sets a group call mode to the output section.

In step 501, the transmission mode control unit determines whether the setting is a group call mode. If the call is in the group call mode, go to step 508; if not, step 502 is performed.

In step 502, the transmission mode control section sets the group call mode to the output section, and then executes step 503.

In step 503, the transmission mode control unit detects whether the best station number is received from the preferred module of the voice preferred system. If so, go to step 504; if not, step 510 is performed.

Step 504, the sending mode control unit sets a tracking mode to the output unit, including sending information of the optimal station number to the output unit; and starting timing. Step 505 is then performed.

Step 505, the sending mode control unit detects whether a message of detecting the PTT double click signal sent from the PTT signal detection unit is received. If so, go to step 511; if not, step 506 is performed.

In step 506, the transmission mode control unit determines whether the current count exceeds the hold time. If yes, go to step 507; if not, step 505 is performed.

In step 507, the transmission mode control section sets the group call mode to the output section, and then executes step 503.

In step 508, the transmission mode control section sets the group call mode to the output section, and then executes step 509.

In step 509, the transmission mode control unit detects whether a message of detecting the PTT double click signal transmitted from the PTT signal detection unit is received. If yes, go to step 503; if not, go to step 509.

Step 510, the transmission mode control unit detects whether a message of detecting the PTT double click signal transmitted from the PTT signal detection unit is received. If so, go to step 511; if not, go to step 503.

In step 511, the transmission mode control unit sets the group call mode to the output unit, and then executes step 508.

The above description is only two embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and scope of the present invention should be considered as being within the scope of the present invention.

Claims

1. A method for changing a transmission mode or transmission mode in a voice preferred system, comprising the steps of,

a. the controller quickly lifts up after pressing the PTT key;

b. the controller then quickly presses the PTT button a second time;

c. when the voice preference system receives the PTT signals generated by all the operations, the sending mode is changed or the sending mode is changed immediately; the sending mode is changed, namely the sending mode is kept unchanged, and the sending mode is set to be a group sending mode; the sending mode is changed, namely, if the current sending mode is the tracking mode, the sending mode is set to be the group calling mode, and if the current sending mode is the group calling mode, the sending mode is set to be the tracking mode; the output unit is set to be in a group sending mode, and starts sending when the PTT signal is effective and stops sending when the PTT signal is ineffective.

2. The method of claim 1, comprising the step of,

a. the PTT signal detection unit detects the PTT signal transmitted by the input unit and records the time when the PTT signal changes from invalid to valid and from valid to invalid;

b. the PTT signal detection unit detects whether the PTT signal has a so-called PTT double click signal which is ' a PTT which becomes invalid after being temporarily valid ' and then quickly becomes valid again '; if the PTT double-click signal exists, immediately sending a message of 'detecting the PTT double-click signal' to a sending mode control unit;

c. when the sending mode control unit receives the PTT double-click signal message, the sending mode is kept unchanged, the sending mode is set as a group sending mode immediately, and the output unit is set as the group sending mode;

d. the output unit starts transmission when the PTT signal is valid according to a set transmission mode, and stops transmission when the PTT signal is invalid.

3. The method of changing transmission mode of claim 1, comprising the steps of,

c. when the sending mode control unit receives the PTT double-click signal detection message, if the current sending mode is a tracking mode, the sending mode is immediately set to be a group calling mode; if the current sending mode is the group calling mode, immediately setting the sending mode as the tracking mode; meanwhile, the output unit is set to be in a group sending mode;

4. A method for changing transmission mode or transmission mode in a voice preferred system according to any of claims 1-3, characterized in that the absolute value of the difference between the time when the first PTT signal becomes active and the time when the PTT signal becomes inactive in the PTT double click signal is between 30ms and 800 ms.

5. A method of changing transmission mode or transmission mode in a voice preferred system according to any one of claims 1-3, characterized in that the absolute value of the difference between the time when the first PTT signal becomes active and then becomes inactive and the time when the second PTT signal immediately thereafter becomes active in the PTT double click signal is between 30ms and 800 ms.

6. A method of changing transmission mode or transmission mode in a voice preferred system according to any one of claims 1-3, characterized in that the absolute value of the difference between the time when the first PTT signal becomes active and the time when the second PTT signal immediately after it becomes active in the PTT double click signal is between 200ms and 1200 ms.