CN101662733A - Method of applying offline direct mode operation (DMO) and device thereof - Google Patents

Abstract

The invention discloses a method for applying an off-network direct mode, which is applied to a cluster communication system, including: after the cluster terminal is turned on, if the user chooses to enter the off-network direct (DMO) mode, the cluster terminal chooses to enter the DMO mode group, and configure call parameters; the trunking terminal enters the DMO mode, and enters the selected group, and performs a group call in the DMO mode in the group. The present invention supports the DMO function on the cluster terminal. When the DMO module is bundled with the cluster terminal, the DMO module is used to provide communication services for users. When there is no network or the network coverage is poor, the communication requirements cannot be met, resulting in the cluster terminal. When the communication cannot be carried out between them, it realizes the support for the cluster terminal to make a call through DMO under the condition of being offline.

Description

A method and device for applying off-grid direct mode

technical field

The invention relates to a trunking communication system, in particular to a method and device for applying an off-network direct mode.

Background technique

The trunking communication system was born in the late 1970s and early 1980s. It mainly provides communication services for mobile users engaged in production scheduling, command and control and other businesses in outdoor operations. It can be said that this is a special communication service, which has been widely used in the fields of railway transportation, field work, emergency rescue, public security, electric power and petroleum due to its advantages of ease of use, fast communication speed and good confidentiality. application.

The earliest trunking communication system was an analog system. With the increasing maturity of digital trunking communication technology, it has become a general trend for trunking communication systems to move from analog to digital. Digital trunking communication technology has changed the shortcomings of analog trunking communication system such as single function, outdated technology and low efficiency. It has a brand-new technical system, flexible communication architecture and powerful service functions, and can provide various communication services such as voice, data and images. Therefore, it has gradually become the mainstream of the market.

Group call is a characteristic function of the trunking communication system, which allows multiple terminals in the same group to talk at the same time.

At present, in the case of a poor network environment, trunking terminals cannot implement group calls. Therefore, people have proposed the concept of DMO (Direct Mode Operation, off-network direct mode). In the case of poor network coverage, an optional special communication mode is provided to the user. This communication mode does not need the support of the base station and can directly communicate between cluster terminals. DMO is mainly used in rural environments without network coverage and urban environments with poor coverage, such as parking lots, indoors, underground construction sites, covert communication (to prevent being monitored by the system), network paralysis and overload and other occasional events, as secondary coverage or backup cover.

The DMO function is an important supplement to the trunking communication and will become a highly competitive service item, but the current trunking terminal cannot support the application of the DMO function.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and device for applying the off-network direct mode, so as to solve the problem that the cluster terminal cannot support the DMO function to provide services for users.

In order to solve the above-mentioned technical problems, a method of applying the off-network direct mode of the present invention is applied to the trunking communication system, including:

After the trunking terminal is turned on, if the user chooses to enter the direct off-network (DMO) mode, the trunking terminal selects the group entered in the DMO mode and configures the call parameters;

The trunking terminal enters the DMO mode, and enters the selected group, and performs a group call in the DMO mode in the group.

Further, the method for the user to choose to enter the DMO mode includes:

After the trunking terminal is turned on, if no user identification card is detected and the user presses the DMO mode entry key, the trunking terminal considers that the user chooses to enter the DMO mode.

Further, the method for the user to choose to enter the DMO mode includes:

After the trunking terminal is turned on, the user selects to switch to the DMO mode in the configuration option of the push-to-talk (PTT) button. After the user confirms the selection, the trunking terminal considers that the user chooses to enter the DMO mode.

Further, the group that the cluster terminal selects to enter in the DMO mode is the group where the cluster terminal exited the DMO mode last time;

When the cluster terminal exits the DMO mode, it saves the group number of the group it is in, and the process for the cluster terminal to select the group it enters in the DMO mode includes: reading the saved group ID of the group it was in when it exited the DMO mode last time Group No.

Further, the call parameters include: volume, signal-to-noise ratio parameters and sub-audio parameters;

The call parameters configured by the trunking terminal are the call parameters when the trunking terminal exited the DMO mode last time;

When the trunking terminal exits the DMO mode, it saves the configured call parameters. The process of configuring the call parameters for the trunking terminal includes: reading the last saved call parameters when exiting the DMO mode, and using the read call parameters for configuration.

Further, after the trunking terminal enters the DMO mode, if the user presses and holds the talk button in the idle state, the trunking terminal turns on the microphone (MIC), turns off the speaker, and obtains the right to speak and enters the speaking state.

Further, when the trunking terminal is in the speaking state, if the user releases the speaking key or the pressing time of the speaking key exceeds the limit, the trunking terminal will give up the right to speak;

And, if the cluster terminal does not receive the voice message event, then close the MIC and enter the idle state;

If the trunking terminal receives a voice message event, it turns off the MIC, turns on the loudspeaker, and enters the answering state.

Further, after the trunking terminal enters the DMO mode, if the trunking terminal receives a voice message event in the idle state, it turns on the loudspeaker and enters the listening state.

Further, when the trunking terminal is in the answering state, if the user presses the speaking key, the trunking terminal turns on the MIC, obtains the right to speak, and enters the speaking state.

Further, a voice source corresponding to the group is stored in the trunking terminal, and the voice content of the voice source is group information;

After the trunking terminal enters the selected group and detects that the user performs group switching, it searches for the saved voice source corresponding to the entered or switched group, and plays the found voice source.

Further, after the cluster terminal detects that the user performs group switching, it waits for a designated time before searching for the voice source, if within the designated time, it still detects that the user performs group switching, then waits and continues to detect; If it is not detected that the user performs group switching within the specified time, the operation of searching for the voice source will be performed.

Further, voice sources in multiple languages corresponding to the group are stored in the cluster terminal;

When the trunking terminal searches for the voice source corresponding to the group, it also selects the voice source of the corresponding language according to the language setting item, and plays it.

Further, a device for applying the off-network direct mode, which is applied in the trunking communication system, includes: a DMO control module and a DMO module, wherein:

The DMO control module is used to select the group entered in the DMO mode when the user chooses to enter the DMO mode, and configure call parameters, enter the DMO mode, and enter the selected group, and control the DMO in the group module to make a group call.

Further, the DMO control module is also used to turn on the MIC and turn off the loudspeaker to obtain the right to speak and enter the speaking state if the user presses the speaking key in the idle state after entering the DMO mode;

In the speaking state, if the user releases the speaking button or the pressing time of the speaking button exceeds the limit, the right to speak is given up; and if no voice message event is received, the MIC is turned off and enters the idle state;

If a voice message event is received, turn off the MIC, turn on the speaker, and enter the answering state;

After entering the DMO mode, in the idle state, if a voice message event is received, the speaker is turned on and enters the answering state;

In the answering state, if the user presses the speaking key, the MIC should be turned on to obtain the right to speak and enter the speaking state.

Further, the device also includes a storage module;

The storage module is used to save the voice source corresponding to the group, and the voice content of the voice source is group information;

The DMO control module is also used to search the voice source corresponding to the entered or switched group from the storage module after entering the selected group and when detecting that the user performs group switching, and play the found audio source voice source.

To sum up, the present invention supports the DMO function on the cluster terminal. When the DMO module is bundled with the cluster terminal, the DMO module is used to provide communication services for users. When there is no network or the network coverage is poor, the communication requirements cannot be met. , when the cluster terminals cannot communicate with each other, realize the support for the cluster terminals to communicate through DMO in the case of offline.

Description of drawings

Fig. 1 is the flow chart that cluster terminal enters DMO module among the present invention;

Fig. 2 is a schematic diagram of switching of the call state of the trunking terminal in the present invention;

Fig. 3 is the flow chart of the method that realizes voice call group among the present invention;

FIG. 4 is a structural diagram of a device applying a touch-through mode according to the present invention.

Detailed ways

In this implementation mode, when there is no network or the network coverage is poor and the communication requirements cannot be met, or the cluster terminal does not detect the user identification card, it provides support for the cluster terminal to use the DMO module, thereby providing users with optional communication In this way, without the support of the base station, the cluster terminals can directly communicate with each other.

The method of this embodiment can be applied in various trunking communication systems, such as a trunking system adopting CDMA (Code Division Multiple Access) mode, and its user identification card is a UIM (User Identity Module, User Identification Module). In the trunking terminal, the work of the DMO module and the work of the CDMA module are mutually exclusive. When the trunking terminal switches from the CDMA mode to the DMO working mode, the CDMA module is in the OFFLINE (offline) mode to reduce the current caused by its radio frequency work. Loss and radio frequency interference to the DMO module, when the trunking terminal works in CDMA mode, the DMO module is in a power-off state.

Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

Figure 1 shows the process of starting the cluster terminal and entering the DMO module, including:

Step 101: After the cluster terminal is turned on, the user chooses to enter the DMO mode;

There are two ways for the user to choose to enter the DMO mode, namely:

A: When the standby application program does not detect the user identification card after the cluster terminal is turned on, if the user presses the DMO mode entry key, the cluster terminal enters the DMO mode. The DMO mode entry key can be the confirmation (OK) key on the cluster terminal keyboard .

B: After the cluster terminal is turned on, select the switch to DMO mode in the configuration option of the PTT (Push To Talk) button, and then choose to enter the DMO mode.

Step 102: When the user chooses to enter the DMO mode in mode B, the trunking terminal prompts the user that network functions such as phone book, external network call and short message cannot be used in the DMO mode, and requests the user to choose whether to continue. If the user chooses yes, then perform step 103; Otherwise, execute step 107;

When the user chooses to enter the DMO mode in mode A, step 103 is directly executed.

Step 103: the cluster terminal reads the group number of the group where the cluster terminal exited the DMO mode last time stored in NV (Non Volatile Memory, non-volatile memory);

When the cluster terminal exits the DMO mode, it needs to save the group number of the current group in the NV.

Step 104: The trunking terminal reads the call parameters stored in the NV for the latest exit from the DMO mode, and uses the read call parameters for parameter configuration;

Call parameters include: volume, signal-to-noise ratio parameter (SQ) and sub-audio frequency parameter (CTCSS), etc.

When the trunking terminal exits the DMO mode, it saves the currently configured call parameters in the NV.

Step 105: If the cluster terminal is configured with the flight mode, turn on the flight mode and enter the DMO mode;

Fetion mode refers to the terminal standby mode used when taking an airplane.

Step 106: The trunking terminal enters the group according to the read group number, and performs a group call in DMO mode in the group;

Step 107: The cluster terminal returns the root directory of the configuration options of the PTT key.

Figure 2 shows the transition of the call state of the trunking terminal in the DMO mode. The transition process between the modes is described below:

a: When the trunking terminal is in the idle state, if the user presses the talk key, the trunking terminal will turn on the MIC (microphone), turn off the speaker, obtain the speaking right and enter the speaking state, and the speaking key can be the PTT key.

b: When the trunking terminal is in the speaking state, if the user releases the PTT button or the pressing time of the PTT button exceeds the limit, the trunking terminal will give up the right to speak, and if no voice message event is received at this time, the trunking terminal will turn off the MIC and The speaker enters the idle state; if a voice message event is received, the MIC is turned off, and the speaker is turned on to enter the answering state.

c: When the trunking terminal is in the idle state, if it receives a voice message event, it will turn on the speaker and enter the answering state from the idle state.

d: When the trunking terminal is in the answering state, if the user presses the PTT key, the trunking terminal will turn on the MIC, obtain the speaking right and enter the speaking state.

Fig. 3 shows the process of implementing the voice group reporting function in the DMO mode in this embodiment. The voice group reporting function refers to that when the trunking terminal enters a group or switches groups, it uses voice to report group information. to prompt the user.

The voice report group should realize that when the trunking terminal initially enters a certain group, it will broadcast the information of the group, and when the user switches the group, it can support sequential broadcast and skip broadcast, that is to say, it can broadcast the information that passes through the switching process. The information of each group, or only the information of the group to which the user finally switches can be broadcast. In order to meet the needs of internationalization, it can support multilingual voice message groups. In order to realize the voice report group, it is necessary to save the voice source corresponding to the group in the trunking terminal. The voice content of the voice source is the group information, and configure the correspondence table between each group and the voice source of multiple languages, which is called the group Group-voice source correspondence table, the specific process of voice report group includes:

Step 301: the user performs a group switching operation through the knob on the cluster terminal keyboard;

In this embodiment, a specialized knob is used to control group switching, which is more convenient and quick for the user, and the user can perform operations of left rotation and right rotation.

Step 302: After the trunking terminal detects the knob event, it judges whether it is in the standby state, if yes, then judges to perform group switching operation, and executes step 303;

Step 303: The trunking terminal switches the current group according to the knob event, turning left to switch to the previous group, and turning right to switch to the next group;

Step 304: The cluster terminal judges whether the knob event is detected again within the specified time (eg, 500 milliseconds), if yes, execute step 302; otherwise, execute step 305;

Step 304 is used to perform skip group call when the knob is continuously rotated rapidly, so as to avoid intermittent group call voice.

Step 305: The trunking terminal searches the group-voice source correspondence table for the voice source corresponding to the group according to the language setting item, and plays it.

When initially entering a group, the cluster terminal directly searches for the voice source corresponding to the group according to the language setting item, and plays it.

In the cluster terminal, users can be provided with two ways to exit from the DMO mode. They can press the right soft key on the keyboard in the DMO interface or select "Switch to CDMA mode" in the option menu. Here, the cluster terminal adopts CDMA as the example. When exiting DMO mode, also turn off airplane mode.

On the cluster terminal, in addition to using the knob to switch groups, you can also switch groups by pressing the up/down keys. The volume can be adjusted by pressing the side up/down keys. You can also manually set the values of SQ and CTCSS to provide to the DMO module for corresponding settings. When the cluster terminal is in an idle state, the interface can display the current date, time, week, and current group number, etc.

This embodiment also provides a device for applying the off-network direct mode, as shown in Figure 4, including: a DMO control module, a DMO module and a storage module, wherein:

The DMO control module is used to select the group entered in the DMO mode when the user chooses to enter the DMO mode, and configure call parameters, enter the DMO mode, and enter the selected group, and control the DMO in the group The module makes a group call;

The DMO control module considers that the user chooses to enter the DMO mode when the user's identification card is not detected and the user presses the DMO mode entry key. Or the user chooses to switch to the DMO mode in the configuration option of the PTT key, and when the user confirms the selection, the DMO control module considers that the user chooses to enter the DMO mode.

The DMO control module is also used to turn on the MIC, turn off the loudspeaker, obtain the right to speak and enter the speaking state if the user presses the speaking key in the idle state after entering the DMO mode;

In the speaking state, if the user releases the speaking button or the pressing time of the speaking button exceeds the limit, the right to speak is given up; and if no voice message event is received, the MIC is turned off and enters the idle state;

If a voice message event is received, turn off the MIC, turn on the speaker, and enter the answering state;

After entering the DMO mode, in the idle state, if a voice message event is received, the speaker is turned on and enters the answering state;

In the answering state, if the user presses the speaking key, the MIC should be turned on to obtain the right to speak and enter the speaking state.

The storage module is used to save the voice source corresponding to the group, and the voice content of the voice source is group information;

The DMO control module is also used to search the voice source corresponding to the entered or switched group from the storage module after entering the selected group and when detecting that the user performs group switching, and play the found audio source voice source.

For other functions of the modules in the device, please refer to the description of the method content.

Those skilled in the art can also make various modifications to the above content without departing from the spirit and scope of the present invention defined by the claims. Therefore, the scope of the present invention is not limited to the above description, but is determined by the scope of the claims.

Claims (15)

1. A method for applying an off-network direct mode, which is applied to a cluster communication system, comprising: After the trunking terminal is turned on, if the user chooses to enter the direct off-network (DMO) mode, the trunking terminal selects the group entered in the DMO mode and configures the call parameters; The trunking terminal enters the DMO mode, and enters the selected group, and performs a group call in the DMO mode in the group. 2. The method according to claim 1, wherein the method for the user to choose to enter the DMO mode comprises: After the trunking terminal is turned on, if no user identification card is detected and the user presses the DMO mode entry key, the trunking terminal considers that the user chooses to enter the DMO mode. 3. The method according to claim 1, wherein the method for the user to choose to enter the DMO mode comprises: After the cluster terminal is turned on, the user selects to switch to the DMO mode in the configuration option of the push-to-talk (PTT) button, and when the user confirms the selection, the cluster terminal considers that the user chooses to enter the DMO mode. 4. The method of claim 1, wherein: The group selected by the cluster terminal to enter in the DMO mode is the group where the cluster terminal exited the DMO mode last time; When the cluster terminal exits the DMO mode, it saves the group number of the group it is in, and the process for the cluster terminal to select the group it enters in the DMO mode includes: reading the saved group it was in when it exited the DMO mode last time group number. 5. The method of claim 1, wherein: The call parameters include: volume, signal-to-noise ratio parameters and sub-audio parameters; The call parameter configured by the cluster terminal is the call parameter when the cluster terminal exited the DMO mode last time; When the trunking terminal exits the DMO mode, it saves the configured call parameters. The process of configuring the call parameters for the trunking terminal includes: reading the last saved call parameters when exiting the DMO mode, and using the read call parameters to perform configuration. 6. The method of claim 1, wherein: After the trunking terminal enters the DMO mode, in the idle state, if the user presses the talk key, the trunking terminal turns on the microphone (MIC), turns off the loudspeaker, obtains the right to speak, and enters the speech state. 7. The method of claim 6, wherein: When the trunking terminal is in the speaking state, if the user releases the speaking key or the pressing time of the speaking key exceeds the limit, the trunking terminal gives up the right to speak; And, if the cluster terminal does not receive the voice message event, then close the MIC and enter the idle state; If the trunking terminal receives a voice message event, it turns off the MIC, turns on the loudspeaker, and enters the answering state. 8. The method of claim 1, wherein: After the trunking terminal enters the DMO mode, if the trunking terminal receives a voice message event in the idle state, it turns on the loudspeaker and enters the answering state. 9. The method of claim 8, wherein: When the trunking terminal is in the answering state, if the user presses the speaking key, the trunking terminal turns on the MIC, acquires the right to speak, and enters the speaking state. 10. The method of claim 1, wherein: A voice source corresponding to the group is stored in the trunking terminal, and the voice content of the voice source is group information; After the trunking terminal enters the selected group and detects that the user performs a group switch, it searches for the saved voice source corresponding to the entered or switched group, and plays the found voice source. 11. The method of claim 10, wherein: After the cluster terminal detects that the user performs group switching, it waits for a designated time before searching for the voice source. If it still detects that the user performs group switching within the designated time, it waits and continues to detect; If it is not detected that the user performs group switching within the specified time, the operation of searching for a voice source is performed. 12. The method of claim 10, wherein: Voice sources in multiple languages corresponding to the group are stored in the cluster terminal; When the trunking terminal searches for the voice source corresponding to the group, it also selects the voice source of the corresponding language according to the language setting item, and plays it. 13. A device for applying off-network direct mode, which is applied in a trunking communication system, including: a DMO control module and a DMO module, wherein: The DMO control module is used to select the group entered in the DMO mode when the user chooses to enter the DMO mode, and configure call parameters, enter the DMO mode, and enter the selected group, in the group and controlling the DMO module to perform group calls. 14. The apparatus of claim 13, wherein: The DMO control module is also used for entering the DMO mode, when in the idle state, if the user presses the speaking key, the MIC is turned on, the loudspeaker is turned off, and the right to speak is obtained to enter the speaking state; When in the speaking state, if the user releases the speaking key or the pressing time of the speaking key exceeds the limit, the right to speak is given up; and if no voice message event is received, the MIC is turned off and enters the idle state; If a voice message event is received, turn off the MIC, turn on the speaker, and enter the answering state; After entering the DMO mode, in the idle state, if a voice message event is received, the speaker is turned on and enters the answering state; In the answering state, if the user presses the speaking key, the MIC will be turned on to obtain the right to speak and enter the speaking state. 15. The device according to claim 13, further comprising a storage module; The storage module is used to save the voice source corresponding to the group, and the voice content of the voice source is group information; The DMO control module is also used to search the voice source corresponding to the entered or switched group from the storage module after entering the selected group and detecting that the user performs group switching, And play the found voice source.

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