JP2012147318A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform broadcast-like communication by utilizing a mobile communication system in a radio communications system.SOLUTION: A control desk 11 transmits voice not for a public address, and a public address desk 12 transmits voice for the public address. A circuit control device 13 encodes the voice not for the public address by a first voice codec system, encodes the voice for the public address by a second voice codec system having a high bit rate, and controls so that the voice for the public address is communicated by using a larger number of slots than that of the voice not for the public address. A base station radio device 14 transmits the encoded voice by radio. First terminal station devices 2 and 4 output the voice not for the public address that is decoded by the first voice codec system, and second terminal station devices 3 and 4 output the voice for the public address that is decoded by the second voice codec system.

Description

  The present invention relates to a wireless communication system, and more particularly, to a wireless communication system that performs broadcast communication using a mobile communication system.

In recent years, with the frequent occurrence of large-scale earthquakes and torrential rains in Japan, the “municipal broadcast system” is attracting particular attention as a means of communicating information to residents.
However, there are local governments that are difficult to introduce a broadcast communication system as soon as possible, due to economic and financial reasons.

By the way, there is a mobile communication system as a disaster prevention administrative radio.
However, broadcast use of mobile communication systems has been difficult for various reasons, such as sound quality problems when using outdoor loudspeakers.

  Furthermore, there is a nationwide instantaneous warning system (J-ALERT) that automatically activates broadcast radio via an artificial satellite and instantly transmits emergency information to residents. It is also desirable to broadcast information from this nationwide instantaneous warning system, but only local governments that have a “municipal broadcast system” can broadcast information from the nationwide instant warning system. There wasn't.

  As the mobile communication system, there are two systems, “a municipal digital mobile communication system” and an “MCA (Multi-Channel Access) land mobile communication system”. In the present specification, “a municipal digital mobile communication system” is taken as an example. This will be described in detail. However, the present invention can be applied to other mobile communication systems such as “MCA (Multi-Channel Access) land mobile communication system”.

JP 2005-20666 A

By the way, in order to develop a mobile communication system as an alternative to a broadcast communication system, it is positioned as a complementary system to the last, but in its operational aspect, "(Operation Example 1) Use as a mobile communication system" Whether to “main” or “(operation example 2) main use of broadcast as information transmission to residents” is the regulations in each municipality or the person in charge of disaster prevention who actually operates A lot depends on the idea.
More specifically, when an emergency disaster occurs, the above (Operation Example 1) mainly emphasizes information sharing among local government staff, and the above (Operation Example 2) provides evacuation instructions to residents, etc. It can be broadly classified as important.

Here, because it is “complementary”, it can be presumed that it is not necessarily true if it is better to neglect (operation example 2) than (operation example 1).
For example, in a case where a residential area is adjacent to a landslide-prone area, depending on the surrounding environment and recent circumstances, it is necessary to carefully consider before system maintenance (equipment introduction) and then deploy to operation .

Furthermore, as described in the above (Operation Example 1), since the mobile communication system mainly performs information communication, that is, communication communication by voice communication, a nationwide instantaneous warning system (siren sounding etc. is essential) There is a problem that it is considerably difficult in terms of sound quality to directly apply to the linkage with J-ALERT).
For example, the speech coding system (EL-CELP system) implemented in municipal digital mobile communication systems is suitable for human speech, but is not suitable for sirens, chimes, music, etc. The original sound cannot be reproduced faithfully. For this reason, if sirens, chimes, and music are output as they are on the wireless reception side, it is thought that the residents will feel uncomfortable and uncomfortable.
In addition, even with human speech, the conventional mobile communication system speech coding system amplifies for loudness and increases the volume to deteriorate the sound quality, making it difficult to hear the speech. End up.

  The present invention has been made in view of such conventional circumstances, and an object of the present invention is to provide a wireless communication system capable of performing broadcast communication using a mobile communication system.

In order to achieve the above object, the wireless communication system according to the present invention has the following configuration.
That is, in the control station, the non-speech transmission means transmits the non-speech voice, the loudspeak transmission means transmits the loudspeak voice,
When the first encoding means inputs the non-speech sound transmitted from the non-speech transmission means, the sound is encoded by the first speech codec method (non-speech speech codec method), When the second encoding means receives the voice for voice enhancement transmitted from the voice transmission means, the second voice codec system (sound voice codec for voice enhancement) having a higher bit rate than the first voice codec system. The speech is encoded using the number of slots that is larger than the number of slots used by the slot control means to communicate the non-speech voice transmitted from the non-speech transmission means. Control is performed so as to communicate the voice for amplification transmitted from the transmission means, and the wireless communication means transmits the encoded voice by radio.

In the first terminal station apparatus, the first decoding means decodes the received voice of the voice encoded by the first voice codec scheme and transmitted by radio according to the first voice codec scheme, The first output means outputs the non-speech sound decoded by the first decoding means.
In the second terminal station apparatus, the second decoding means decodes the received voice of the voice encoded by the second voice codec scheme and transmitted by radio according to the second voice codec scheme, The second output means outputs the voice for loudness decoded by the second decoding means.

The loud sound transmission means is provided in a device separate from the non-sound sound transmission means, or is provided in a device integrated with the non-sound sound transmission means.
The second terminal station apparatus is configured as a separate apparatus from the first terminal station apparatus or configured as an apparatus integrated with the first terminal station apparatus.

  As described above, according to the wireless communication system according to the present invention, broadcast communication can be performed using the mobile communication system.

It is a figure which shows the structural example of the radio | wireless communications system which concerns on one Example (1st Example) of this invention. (A) is a figure which shows an example of a mode in the case of allocating 1 slot in a frame, and (b) is a figure which shows an example of a mode in the case of allocating and communicating in 3 slots in a frame. (A), (b) is a figure which shows an example of the transition of the display content of the display part of a control stand. (A), (b) is a figure which shows an example of the transition of the display content of the display part of a control stand. It is a figure which shows the structural example of the radio | wireless communications system which concerns on one Example (2nd Example) of this invention. It is a figure which shows the structural example of the radio | wireless communications system which concerns on one Example (3rd Example) of this invention. It is a figure which shows the table | surface which compared the municipal digital mobile communication system and the original digital broadcast communication system. It is a figure which shows the structural example of the radio | wireless communications system which concerns on a prior art example.

Embodiments according to the present invention will be described with reference to the drawings.
First, a base mobile communication system will be described.
FIG. 8 shows a configuration example of a wireless communication system according to a conventional example.
The wireless communication system of this example is roughly composed of a control station (control station apparatus) 301 and a mobile station (mobile station apparatus) 302.
The control station 301 includes a control table 311 on which an operator (person) operates communication, a line control device 312 serving as the center of the system, a base station wireless device 313 that performs wireless communication with the mobile station 302, and the like.
In addition, a base station area (base zone) 321 exists as a range where radio waves of the base station wireless device 313 can reach, and wireless communication is performed using the normal base station wave 331 in the area of the base station area 321.

  Here, in this specification, since it is described with respect to the “municipal digital mobile communication system”, the frequency of the base station wave 331 is the 260 MHz band, and the minimum standard necessary for communication in Japan is set. It is assumed that the determined wireless section interface conforms to ARIB (Radio Industry Association) standard STD-T79.

The basic configuration of the system is such a configuration, and a communication call operation such as a damage status report from the mobile station 302 to the control station 311 or various instructions from the control station 311 to the mobile station 302 is performed.
In the following embodiment, an example of a system in a case where broadcast communication is complementarily performed will be described based on the system shown in FIG.

A first embodiment of the present invention will be described.
FIG. 1 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The wireless communication system of this example is roughly composed of a control station (control station device) 1, a mobile station (mobile station device) 2, a loudspeaker slave station (speaker slave device) 3, a loudspeaker / non-speaker. It is composed of a loudspeaker slave station (speaker / non-speech slave station device) 4.
The control station 1 is a base station radio that performs wireless communication with a control base 11 and a loudspeaker 12 that are operated by an operator (person), a line control device 13 that is the center of the system, and mobile stations 2 and slave stations 3 and 4. The device 14 is configured.
In addition, a base station area (base zone) 61 exists as a range in which radio waves of the base station wireless device 14 can reach, and wireless communication is performed using the normal base station wave 71 in the area of the base station area 61.

Here, generally, the communication partner of the control table 11 is the mobile station 2, and the communication partner of the loudspeaker 12 is the loudspeaker slave station 3. In this example, further, a loudspeaker / non-speech slave station 4 is provided, which serves as a communication partner of the control table 11 and the loudspeaker 12.
Although not shown in the figure, there are usually a plurality of mobile stations 2 and loudspeaker slave stations 3 each. Similarly, a plurality of stations may be provided for the sound expansion / non-sound expansion slave station 4.

In such a configuration of this example, in addition to the operation of the communication call between the control table 11 and the mobile station 2, the operation of the broadcast is performed between the loudspeaker 12 and the slave station 3 in the same system. It becomes possible to do. Further, in this example, it is possible to operate a communication call between the control table 11 and the loudspeaker / non-speech slave station 4 and broadcast operation between the loudspeaker stand 12 and the loudspeaker / non-speech slave station 4. is there.
Further, in the configuration of this example, for example, after the introduction of the system having the configuration shown in FIG. 8 for the communication call operation is completed, it is easy to additionally prepare for the broadcast operation.

The line control device 13 includes a non-sounding codec unit 21, a sounding codec unit 22, a switching unit 23, and a slot control unit 24.
The mobile station 2 includes a wireless unit 31, a non-sounding codec unit 32, and a non-sounding output unit 33.
The loudspeaker slave station 3 includes a radio unit 41, a loudspeaker codec unit 42, a loudspeaker output unit 43, and a loudspeaker speaker 44. Note that the wireless unit 41 may have only a reception function.
The loudspeaker / non-speech slave station 4 includes a radio unit 51, a switching unit 52, a loudspeaker codec unit 53, a loudspeaker output unit 54, a non-speaker codec unit 55, a non-speaker output unit 56, and a loudspeaker speaker 57. ing.
Here, as the loudspeakers 44 and 57, for example, trumpet speakers can be used.

An example of operations performed in the wireless communication system of the present example will be shown.
Note that components similar to those in FIG. 8 have a function of performing similar operations.
The control table 11 is operated by an operator to execute a call (voice communication) with the mobile station 2 or the voice / non-speech slave station 4, or to the mobile station 2 or the voice / non-speech slave station. For example, an instruction such as an individual call or a group call is transmitted to 4.
Here, the control stand 11 does not perform loudspeaking broadcasting, and communicates sound that is not loud (non-speaking).
In this example, an example of the operation in the case where the voice for call and the information of the destination address are output from the control console 11 to the line control device 13 will be described in detail. The destination may be one device (in this example, a mobile station or a slave station), or a plurality of devices, for example, all devices.

The loudspeaker 12 is operated by an operator, and performs loudspeaking broadcasting (transmission of voice for loudspeaking) to the loudspeaker slave station 3 and the loudspeaker / non-speaker slave station 4.
Here, as the voice for amplifying, for example, a voice input such as a human voice, a voice synthesized by inputting text, a pre-stored music, chime, siren or the like can be used. .
In this example, an example of the operation in the case where the voice for loudspeaking and the information of the addressee are outputted from the loudspeaker 12 to the line control device 13 will be described in detail. The destination may be one device or a plurality of devices, for example, all devices.

The line control device 13 communicates between the control table 11 and the mobile station 2 or the loudspeaker / non-speech slave station 4 or from the loudspeaker 12 to the loudspeaker slave station 3 or the loudspeaker / non-speaker slave station 4. Control loudspeaker broadcasting.
As a specific example, the line control device 13 generates a signal for transmitting the voice for call input from the control board 11 to the destination, and outputs the signal to the base station radio device 14. A signal for transmitting the voice for amplification input from the base 12 to the destination is generated and output to the base station radio apparatus 14.

At this time, the line control device 13 determines whether the voice is a voice for calling from the control table 11 or a voice for voice from the loudspeaker 12, and is the voice for calling from the control table 11. Is switched by the non-sounding codec unit 21, and is switched by the switching unit 23 so as to be encoded by the sounding codec unit 22 when the sound is for the sound from the loudspeaker 12.
In this example, the non-speech codec unit 21 uses the EL-CELP method as a speech codec, and the speech enhancement codec unit 22 has a higher bit rate than the non-speech codec unit 21 as a speech codec. Audio codecs (for example, a scheme different from the EL-CELP scheme and the S scheme) are used.

Further, when the voice for call from the control table 11 is encoded by the non-speech codec unit 21 by the slot control unit 24 by the slot control unit 24, the line control device 13 is assigned to communicate with one slot in the frame. In the case where the voice for the loudspeaker from the loudspeaker 12 is encoded by the loudspeaker codec unit 22, two or more slots (3 slots as an example) in the frame are assigned and communicated. To control.
Here, in this example, it is assumed that real-time communication is required for both a communication call (voice for call) and a loudspeaker broadcast (voice for voice).

FIG. 2 (a) shows an example of a state in which one slot in the frame is assigned for communication, and FIG. 2 (b) shows a case in which three slots in the frame are assigned for communication. An example of the situation is shown. Note that the radio communication system of this example employs, for example, a TDI (Time Division Multiple Access) system.
In FIGS. 2A and 2B, the horizontal axis represents time, and one frame includes four slots of “control slot, communication slot, communication slot, and communication slot”.
In the example of FIG. 2 (a), one communication slot (for example, the first slot) is assigned to each frame in the communication interval, and in the example of FIG. 2 (b), in the communication interval, Three communication slots (for example, slots 1, 2, and 3) are assigned for each frame.

  The base station wireless device 14 wirelessly communicates signals with the mobile station 2 and the slave stations 3 and 4 and, as a specific example, wirelessly transmits a signal to be transmitted input from the line control device 13. This radio signal is wirelessly transmitted to the mobile station 2 and the slave stations 3 and 4 existing in the base station area 61.

The mobile station 2 has a function of processing a voice signal for speech (non-speech voice) and does not have a function of processing a voice signal for loudspeaker.
As a specific example, the mobile station 2 receives a signal wirelessly transmitted from the base station radio device 14 by the radio unit 31 using an antenna, and the received signal is a voice signal for a call addressed to itself (control board). 11 is decoded by the non-speech codec unit 32, and the decoded speech is output by the non-speech output unit 33. As the non-speaking output unit 33, for example, a speaker (speaker that is not for loudspeaker) can be used.
Here, the non-speech codec unit 32 uses the same voice codec as the non-speech codec unit 21 of the line control device 13.

The loudspeaker slave station 3 has a function of processing a voice signal for loudspeaking, and does not have a function of processing a voice signal for calling (non-speaking voice).
As a specific example, the mobile station 3 for loudspeaking receives a signal wirelessly transmitted from the base station wireless device 14 by the wireless unit 41 using an antenna, and the received signal is a voice signal for loudspeaking ( If it is a signal from the loudspeaker stand 12, the loudspeaker codec unit 42 decodes the decoded speech, and the loudspeaker output unit 43 outputs it from the loudspeaker speaker 44.
Here, the loudspeaker codec unit 42 uses the same voice codec as the loudspeaker codec unit 22 of the line control device 13.

The extension / non-speech slave station 4 has a function of processing a voice signal for voice enhancement and a function of processing a voice signal for speech (non-sound voice).
As a specific example, the extension / non-speech slave station 4 receives a signal wirelessly transmitted from the base station radio apparatus 14 by the radio unit 51 using an antenna, and the received signal is a voice for voice enhancement addressed to itself. And that the received signal is a voice signal for a call addressed to the own station (a signal from the control board 11).

The loudspeaker / non-speech slave station 4 is switched by the switching unit 52, and it is determined that the received signal is a loudspeaking voice signal (signal from the loudspeaker 12) addressed to the local station. In this case, the voice codec 53 decodes the decoded voice, and the voice output unit 54 outputs the voice from the loudspeaker 57. The received signal is a voice signal for the call addressed to the own station (control board). 11 is decoded by the non-speech codec unit 55, and the decoded speech is output by the non-speech output unit 56. As the non-speaking output unit 56, for example, a speaker (speaker not for loudspeaker) can be used.
Here, the loudspeaker codec unit 53 uses the same voice codec as the loudspeaker codec unit 22 of the line control device 13, and the non-speaking codec unit 55 is the same as the non-speaking codec unit 21 of the line control device 13. Use the same audio codec.

Next, the sound quality during broadcast operation will be described.
FIG. 7 shows a table comparing the municipal digital mobile communication system and the original digital broadcast communication system.
Since these are different systems, the standards and frequency bands that are radio interface are naturally different, but “frame”, “slot” or “bit rate” are common technical terms and will not be described in detail. Thus, the sound quality will be described focusing on the concept of speech coding.

  In other words, the key point is how much encoded voice data can be inserted into a slot in one frame that can be used for user data transmission / reception. When the frequency is one wave, the structure is a four-slot structure of “control slot 1 + communication slot 3”, and therefore the speech coding method employed in the original digital broadcast communication system is technically applied. I can't.

For example, if another frequency is licensed in the system and the assigned frequency becomes two waves and the number of slots increases, “control slot 1 + communication slot 7 (conventional 3 + 4 for new license)” Although the technical barriers are cleared, it is adopted in the original digital broadcast communication system because there is no increase in the use of loudspeakers in conjunction with the significance of being a “complementary system until broadcast system maintenance” It is practically impossible to apply the speech encoding method that has been used.
(It may be applied if the voice encoding method adopted in the original digital broadcast communication system can be applied.)

  Therefore, at least during the broadcasting operation in which at least the loudspeaker 12 to the line control device 13 to the base station radio device 14 to the slave stations 3 and 4 are connected to each other, 3 slots or less at both ends (wireless section interface) of the normal base station wave 71 In other words, it is preferable to implement a speech encoding method that has a bit rate of 6.4 kbps × 3 = 19.2 kbps or less and that is suitable not only for speech but also for sirens, chimes, and music.

In the past, there was the idea that sound sources other than voice (for example, sirens and chimes) were pre-installed on the side of the slave stations 3 and 4 that receive the loudspeaker broadcast, but now the Internet and rapid digitization As a result, many low-bit-rate and high-quality speech coding methods have come out in the world, and it is possible to send any pattern at any time, rather than mounting a fixed pattern on the slave stations 3 and 4 side. It is considered better to leave it on.
Actually, it is considered to be mounted on the slave stations 3 and 4 that perform the loudspeaking output and mounted on the line control device 13 or the base station wireless device 14 in the control station 1, but various configurations may be used. Good.
In the wireless communication system of this example, the voice codec units 22, 42, and 53 have a higher bit rate than the voice codec (for example, EL-CELP) that the non-speaking codec units 21, 32, and 55 have. Voice encoding / decoding is performed by (for example, AMR-WB).

Next, priority and interruption will be described.
For example, if either the control stand 11 or the loudspeaker stand 12 is not used, it is considered that there is no particular collision. However, when one of the priority processes in operation is in use and the other interrupts, A description will be given of how to make a determination by exchanging signals between devices.

  As a specific example, when the loudspeaker 12 is given priority and is actually being broadcasted, the loudspeaker 12-the line controller 13-the base station radio device 14-the slave station (speaker slave station) 3 and a loudspeaker / non-speech slave station 4) are connected to a line, and a voice such as an evacuation instruction from the loudspeaker 12 is on the line. In this example, the line connection procedure and the like are in accordance with the above-mentioned standard, and a detailed description is omitted here.

  If the communication call operation such as various instructions from the control table 11 to the mobile station 2 (or the loud / non-speech slave station 4) is interrupted during such broadcast operation, a signal from the control table 11 (For example, the control signal) is determined to have no priority by the line control device 13 and is returned to the control table 11.

FIGS. 3A and 3B show an example of transition of display contents on the display unit of the control table 11 at this time.
Specifically, as shown in FIG. 3 (a), from the state of displaying that the individual communication is being called for the mobile station 2 (“mobile station xx” as a display example) As shown in FIG. 3 (b), a transition is made to a state in which it is displayed that the loudspeaker 12 is forcibly disconnected because it is in use (broadcast operation). Similarly, when the mobile station 2 performs a call process to the control table 11 or another mobile station, the contents as shown in FIGS. 3A and 3B are displayed on the display unit.

As an example opposite to the above, when a communication call operation is actually performed, the control table 11 to the line control device 13 to the base station radio device 14 to the mobile station 2 are connected to the line, and the control table is placed on the line. The voice of various instructions from 11 is carried.
If the broadcast operation such as an evacuation instruction from the loudspeaker 12 to the slave stations 3 and 4 is interrupted during the communication call operation, a signal (for example, a control signal) from the loudspeaker 12 is transmitted to the line control device. 13 is determined to have priority, and the above-mentioned connected line is forcibly disconnected, and the loudspeaker 12 to the line controller 13 to the base station radio unit 14 to the slave station (speech station 3 and loud / non-sound loudspeaker). The slave station 4) is connected to the line.

FIGS. 4A and 4B show an example of transition of display contents on the display unit of the control table 11 at this time.
Specifically, as shown in FIG. 4 (a), it is displayed that a call is being made with the mobile station 2 ("mobile station xx" as a display example) by individual communication. As shown in FIG. 4B, the state is changed to a state in which it is displayed that it has been forcibly disconnected due to the interruption of the loudspeaker 12. The same display is performed on the display unit of the mobile station 2.

Here, in this example, the loudspeaker 12 has a higher priority than the control table 11, the control table 11 does not have priority, and the loudspeaker 12 has priority. Although shown, for example, the case where the presence / absence of the priority is reversed may be used, and the presence / absence of the priority of each device (in this case, the control table 11 and the loudspeaker 12) is arbitrarily determined by the operator or the like. A configuration that can be set or changed may be used.
In addition, the function of storing such priority information in a memory or the like, and the function of determining and controlling the communication priority based on such a priority as in this example can be performed anywhere in the system. As an example, it is provided in the line control device 13 which is the center of the system.

  In this example, the control table 11 and the loudspeaker 12 are controlled by, for example, the line control device 13 so that the mutual operation status and failure status are displayed on the display units of the respective devices. .

  As described above, in the wireless communication system of this example, the control station 1 includes at least the line control device 13 and the control base 11, the base station (base station wireless device 14), and the mobile station 2, and is mainly controlled. In the case where a voice communication call operation is performed between the base 11 and the mobile station 2, a loudspeaker 12 is added to the control station 1 as a broadcast operation device for information transmission, and a loudspeaker output is also provided. Added slave stations 3 and 4.

Further, in the wireless communication system of this example, the priority of the communication call operation and the broadcast operation can be selected.
In the wireless communication system of this example, the operation status and the fault status of the control table 11 and the loudspeaker table 12 are clearly shown on each display unit (for example, a screen).
Further, in the wireless communication system of this example, a higher-quality voice encoding method (voice codec) is used during broadcast operation for information transmission than during contact call operation.

As a specific example, in the wireless communication system of the present example, when a municipality uses a mobile communication system to perform broadcast communication, when preparing a plurality of audio codecs and performing loudspeaker broadcasting, The voice codec having a higher bit rate, which is different from the voice codec of the normal voice call, is used, and the number of used slots is increased as compared with the normal voice call.
Further, in the wireless communication system of this example, the main operation when performing broadcast communication utilizing the municipal digital mobile communication system is “(Operation Example 1) Mainly used as a mobile communication system” or It is possible to select either “(Operation Example 2) Mainly using broadcast as information transmission to the residents”. Implement a speech coding system (speech codec) with better sound quality.

Therefore, the wireless communication system of this example can provide a good (for example, the best) device configuration when performing broadcast communication using the municipal digital mobile communication system, and is flexible. Can be operated, and a configuration with excellent cost performance can be provided.
Further, in the wireless communication system of this example, in the broadcast use utilizing the mobile communication system, it is possible to give priority to the actual operation, for example, depending on the surrounding environment, introduction situation, etc. . For example, when priority is given to the loudspeaker broadcast, the normal communication call is suppressed or forcibly disconnected during the loudspeaker broadcast, so that an emergency call to the residents can be reliably performed in an emergency. In addition, for example, when priority is given to non-speech communication, emergency communication to municipal staff can be surely performed in preference to regular broadcasting to residents.
Moreover, in the wireless communication system of this example, required sound quality can be ensured as information transmission to the residents, and a good (for example, the best) system construction and wireless communication method can be provided.

  Here, the line control device 13 determines whether the voice signal (data) input from the control table 11 or the loudspeaker 12 is for non-speaking (in this example, for calling) or for loudspeaking. For example, various methods may be used. For example, a determination method according to which device (in this case, the control table 11 or the loudspeaker 12) is input, or the control table 11 or the loudspeaker 12 is attached to the voice signal (data) output by the terminal 12 with identification information indicating whether it is for non-speech or for loud-speaking, and the line control device 13 determines the method based on the identification information. Can be used.

In addition, in the mobile station 2 and the slave stations 3 and 4 on the receiving side of the signal (data) for non-speech (for the call in this example) or for the loudspeak, for example, the own station is at the destination of the received signal. If it is included, the processing of the received signal is continued. In this case, the mobile station 2 and the expansion slave station 3 use a predetermined audio codec.
Further, the extension / non-speech slave station 4 determines whether the received signal is for non-speech (in this example, for a call) or for loudspeaker, and determines the voice codec used for processing the received signal. In this case, for example, a method for determining according to a transmission source of the reception signal (in this example, the control table 11 or the loudspeaker 12), or the control table 11 or the loudspeaker 12 outputs. A method in which identification information indicating whether it is for non-speech or for loudspeaking is attached to a voice signal (data), and the loudspeaker / non-speech slave station 4 determines based on the identification information, Alternatively, a method of performing voice codec designation from the control station 1 side (for example, the line control device 13 or the like) to the loudspeaker / non-speaker slave station 4 before or after establishment of communication in the wireless section, or The user (person) picks up the handset at the extension / non-speech slave station 4. In such a case, a method of using a voice codec for non-speech (in this example, for a call) or a loudspeaker / non-speech slave station 4 has two destinations, a loudspeaker destination and a non-speaker destination, For example, a method in which the control table 11 and the loudspeaker 12 designate respective destinations to transmit voice and the loudspeaker / non-speaker slave station 4 switches the voice codec according to the destinations can be used.

  Further, in this example, the case where the line control device 13 includes the loudspeaker codec unit 22 has been described. However, the loudspeaker codec unit 22 is configured as a separate device from the line control device 13, and the loudspeaker 12 and the line control device are configured. 13 may be interposed. In this case, the switching unit 23 is not required, the voice from the control table 11 is voice-coded by the non-speaking codec unit 21, and the slot control unit 24 has the data encoded by the non-speaking codec unit 21 in one slot. The data transmitted and input to the line control device 13 from the loudspeaker codec unit 22 is transmitted in two or more slots.

In the wireless communication system of this example, a control device having a function of a non-speech transmission means for transmitting non-speech sound is configured by the control table 11, and the loudspeaker table 12 is used for the sound enhancement. A loudspeaker having a function of loudspeaker transmitting means for transmitting voice is configured.
Further, in the wireless communication system of this example, when the non-speech sound transmitted from the control device is input by the line control device 13, the first speech codec method (non-speech speech codec method) When the voice is encoded and the voice for loudness transmitted from the loudspeaker is input, the second voice codec system (sound voice codec system) has a higher bit rate than the first voice codec system. The function of the encoding control means for controlling the voice to be encoded (in this example, the function of the non-sounding codec unit 21, the sounding codec unit 22 and the switching unit 23), and the non-sounding function transmitted from the control device Slot that controls to communicate the voice for loudspeaker transmitted from the loudspeaker using a larger number of slots than the number of slots used for communicating the voice of (In this example, the function of the slot control unit 24) functions control means and, a control device provided with is configured.
Further, in the wireless communication system of this example, the base station wireless device 14 constitutes a base station device having a function of wireless communication means for wirelessly transmitting voice controlled and encoded by the control device.

Further, in the wireless communication system of the present example, the first decoding means for decoding the received voice of the voice encoded by the mobile station 2 by the first voice codec scheme and transmitted by radio by the first voice codec scheme. Function (in this example, the function of the non-speaking codec unit 32) and the function of the first output means (in this example, the non-speaking speech decoded by the function of the first decoding means) The function of the output unit 33 for sound amplification) is configured.
Further, in the wireless communication system of the present example, the second voice codec system decodes the received voice of the voice that is encoded by the second voice codec system and transmitted by the radio using the second voice codec system. The function of the decoding means (in this example, the function of the loudspeaker codec unit 42) and the function of the second output means (in this example, the loudspeaker) that outputs the voice for loudness decoded by the function of the second decoding means The function of the output unit 43 and the loudspeaker speaker 44) is configured.
Further, in the wireless communication system of this example, the loudspeaker / non-speech slave station 4 constitutes a device in which the first terminal station device and the second terminal station device are integrated. The function of the first decoding means is configured by the function of No. 1, the function of the first output means is configured by the function of the non-speaking output section 56, and the second decoding is performed by the function of the voice codec section 53. The function of the means is constituted, and the function of the second output means is constituted by the functions of the loudspeaker output section 54 and the loudspeaker speaker 57.

Here, various non-speech sounds (sounds not for loudspeaking) and loudspeaking sounds may be used.
Moreover, the voice to be transmitted may be uttered by, for example, the control device or the loudspeaker, or the voice (all or part thereof) uttered by another device is input to the control device or the loudspeaker and transmitted. It may be targeted.
In addition, various types may be used as the first audio codec method (non-speech audio codec method) and the second audio codec method (speech audio codec method), respectively.
In addition, various numbers may be used as the number of slots used for communicating non-speech sound and the number of slots used for communicating sound for sound enhancement.
In addition, the control device may be configured by, for example, one device, or may be configured by two or more devices in which each unit is distributed in each of two or more devices. .

A second embodiment of the present invention will be described.
FIG. 5 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The configuration of the wireless communication system of this example is roughly the same as the configuration of the wireless communication system shown in FIG. A loudspeaker 111) is provided.
In FIG. 5, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

An example of operations performed in the wireless communication system of the present example will be shown. In this example, operations different from those of the wireless communication system shown in FIG. 1 will be described in detail.
The control / sound loudspeaker 111 is operated by an operator to perform a call (speech communication) with the mobile station 2 or the loudspeaker / non-speech slave station 4, or for the mobile station 2 or the loudspeaker / non-speaker. Instructions such as individual calls and group calls are transmitted to the slave stations 4, and loudspeaker broadcasting (transmission of voice for loudspeaking) is performed to the loudspeaker slave stations 3 and the loudspeaker / non-speaker slave stations 4 Do things. Here, for example, the operator performs non-speech voice communication (in this example, a contact call), or performs voice communication for loudspeaking (in this example, loudspeaker broadcasting). Instructions can be given to the control / loudspeaker 111.

As a specific example, the control / sound loudspeaker 111 outputs a voice for a call and its destination information to the line control device 112, and outputs a voice for a loudness and its destination information to the line control device 112. Do things.
In this case, as an example, the control / sound loudspeaker 111 attaches identification information indicating whether it is for non-speech (in this example, for a call) or for loudspeaker to the output audio signal (data). Then, based on the identification information, it is determined whether the line control device 112 is for non-speech or for loudspeaker.
The line control device 112 includes processing units 21 to 24 similar to those of the line control device 13 shown in FIG. 1, and is based on the result of determining whether the input signal is for non-speech or for loudspeaker. It performs control to transmit audio using the corresponding audio codec and the number of slots.

As described above, in the wireless communication system of this example, the function of the control table and the function of the loudspeaker are provided in the same device (in this example, the control / speaking table 111).
Therefore, for example, when there is only one person in charge at the control table and the loudspeaker, it is possible to improve efficiency by combining these devices as in this example. Further, for example, when the person in charge is different (for example, two persons) in the control table and the loudspeaker, a configuration as shown in FIG. 1 can be used as necessary.

A third embodiment of the present invention will be described.
FIG. 6 shows a configuration example of a wireless communication system according to an embodiment of the present invention.
The configuration of the wireless communication system of this example is roughly the same as the configuration of the wireless communication system shown in FIG. 1, but the national instantaneous warning system (J-ALERT) 211 is connected to the loudspeaker 212 for the control station 201. Is provided.
In FIG. 6, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

Here, the National Instantaneous Warning System 211 (in this case, the automatic reception starter) promoted by the Ministry of Internal Affairs and Communications, is intended to widely disseminate emergency information such as large-scale disasters and national protection. , It must be output from the slave stations 3 and 4 as a loud output. Therefore, in such a case, the connection destination of the national instantaneous warning system 211 is necessarily the loudspeaker 212.
The loudspeaker 212 has, for example, the same function as the loudspeaker 12 shown in FIG. 1. In this example, the loudspeaker 212 has a function linked to the national instantaneous alarm system 211 installed in the control station 201. is doing.

An example of operations performed in the wireless communication system of the present example will be shown. In this example, operations different from those of the wireless communication system shown in FIG. 1 will be described in detail.
As the loudspeaker signal (data) from the national instantaneous warning system 211, one or a combination of two or more of voices (for example, emergency information) and sirens are input.
The loudspeaker 212 outputs the signal (data) input from the national instantaneous warning system 211 to the line control device 13 as a voice signal (data) for louding. And this voice is broadcasted loudly.
Here, the signal from the national instantaneous warning system 211 is prioritized over the voice information directly input by the operator to the loudspeaker 212. In other words, even if the operator is performing loudspeaker broadcasting or operating it, if there is an input from the national instantaneous warning system 211, the loudspeaker 212 and the line control device 13 stop or interrupt the broadcast processing by the operator. Then, the notification of the national instantaneous warning system 211 is preferentially performed and executed reliably.

  As described above, in the wireless communication system of this example, for example, required sound quality can be ensured as information transmission to residents, and various alarms can be broadcasted in conjunction with the national instantaneous alarm system 211. .

(Summary of Examples)
Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various systems and devices.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

  1, 101, 201, 301 ··· Control station 2, 302 ··· Mobile station 3 · · Auxiliary station for speech enhancement 4 · · Auxiliary / non-speech slave station 11, 311 ··· Control stand 12, 212 .. Loudspeaker, 13, 112, 312 ..Line control device, 14, 313 ..Base station radio device, 21, 32,55 ..Non-speaking codec section, 22, 42, 53. 23, 52 ... Switching unit 24 ... Slot control unit 31, 41, 51 ... Wireless unit 33, 56 ... Non-speaking output unit 43, 54 ... Speaking output unit 44, 57 .. Loudspeaker, 61, 321 .. Base station area, 71, 331 .. Base station wave (system wave), 111 .. Control / loudspeaker, 211 .. National instantaneous warning system,

Claims (1)

Non-speech transmission means for transmitting non-speech sound;
Amplifying transmission means for transmitting a sound for amplifying,
A first encoding unit that encodes the speech by a first speech codec method when the non-speech voice transmitted from the non-speech transmission unit is input;
Second encoding that encodes the voice by the second voice codec method having a higher bit rate than the first voice codec method when the voice for voice transmission transmitted from the voice transmission means is input. Means,
Communicating the voice for loudness transmitted from the loudspeaker transmission means using a larger number of slots than the number of slots used for communicating the voice for nonspeaking transmitted from the non-speech transmission means. Slot control means for controlling
A wireless communication means for wirelessly transmitting the encoded voice, and a control station comprising:
A first decoding means for decoding the received voice of the voice encoded by the first voice codec system and transmitted by radio, and a non-decoded voice decoded by the first decoding means. A first output means for outputting a voice for amplifying, a first terminal station apparatus comprising:
A second decoding means for decoding the received voice encoded by the second voice codec scheme and transmitted by radio using the second voice codec scheme; and a loudspeaker decoded by the second decoding section. A second terminal station device comprising: a second output means for outputting a voice for use;
The loud sound transmission means is provided in a device separate from the non-sound sound transmission means or is provided in a device integrated with the non-sound sound transmission means,
The second terminal station apparatus is configured as a separate apparatus from the first terminal station apparatus or configured as an apparatus integrated with the first terminal station apparatus,
A wireless communication system.

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