TWI822574B - Control device, intercom system, control method, program, common entrance device - Google Patents

Abstract

The purpose of this disclosure is to provide a technology for improving the communication efficiency of the walkie-talkie system. The disclosed trunk communication unit 560 communicates with each of a plurality of information terminals. The control unit 540 controls the occupied trunk communication unit 560 . The trunk communication unit 560 occupies a predetermined period, and the period includes a first period in which TDMA (Time Division Multiple Access) can be performed by allocating communication time slots to one or more of a plurality of information terminals. Communication; in the second period, it can perform CSMA (Carrier Sense Multiple Access) communication with more than one of a plurality of information terminals; in the third period, it can communicate with one of a plurality of information terminals The above performs CSMA communication. The second period and the third period are used for communication of different types of information.

Description

Control device, intercom system, control method, program, common entrance device

The present disclosure relates to a communication technology, and in particular to a control device, an intercom system, a control method, a program, and a common entrance device that communicate with a plurality of information terminals.

In an intercom system installed in a collective facility such as an apartment, if the common entrance device is operated by a visitor, a call request is sent. The call request is received by the information terminal of the facility to be called via the control device. When the resident of the facility operates the information terminal to answer the call, communication with the information terminal via the common entrance device of the control device is started (see Patent Document 1, for example). [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2021-083220

[Problem to be solved by the invention]

The information terminals of each of the plurality of facilities included in the housing complex are connected to the control device. Between the control device and the information terminal, in addition to communication for communication between the common entrance device and the information terminal (hereinafter referred to as "call communication"), communication for communication between two or more information terminals (hereinafter referred to as "call communication") is also performed. Hereinafter, referred to as "inter-facility calls"). Furthermore, non-call information is also transmitted from the information terminal to the control device (hereinafter referred to as "non-call communication"). Under such circumstances, efficiency of communication between the control device and the information terminal is sought.

The present disclosure was made in view of this situation, and its purpose is to provide a technology that improves the communication efficiency of the walkie-talkie system. [Technical means to solve problems]

In order to solve the above problems, a control device of a certain aspect of the present disclosure is used in an intercom system installed in a collective facility to control communication between a common entrance device and information terminals installed in each of a plurality of facilities, and has A communication unit that communicates with each of the plurality of information terminals, and a control unit that controls the communication unit. The control unit specifies a cycle, which includes: a first period in which it can perform TDMA (Time Division Multiple Access) communication by allocating communication time slots to more than one of a plurality of information terminals; and a second period in which it can perform TDMA (Time Division Multiple Access) communication with More than one of the plurality of information terminals performs CSMA (Carrier Sense Multiple Access) communication; in the third period, it can perform CSMA communication with more than one of the plurality of information terminals; and the second period and the third period are used for each other Communication of different types of information.

Another aspect of the present disclosure is a control method. This method is a control method for a control device that controls communication between a common entrance device and information terminals installed in each of a plurality of facilities in an intercom system installed in a collective facility. The specified period includes: During the first period, it can perform TDMA (Time Division Multiple Access) communication by allocating communication time slots to more than one of a plurality of information terminals; during the second period, it can perform with one or more of a plurality of information terminals. CSMA (Carrier Sense Multiple Access) communication; in the third period, it can perform CSMA communication with more than one of a plurality of information terminals; and the second period and the third period are used for communication of different types of information.

Another example of this disclosure is a common entrance device. This device is a common entrance device used in an intercom system installed in a collective facility to control communication with information terminals installed in each of a plurality of facilities, and is provided with a communication unit that communicates with each of the plurality of information terminals. Communications; and a Control Section, which controls the Communications Section. The control unit specifies a cycle, which includes: a first period in which it can perform TDMA (Time Division Multiple Access) communication by allocating communication time slots to more than one of a plurality of information terminals; and a second period in which it can perform TDMA (Time Division Multiple Access) communication with More than one of the plurality of information terminals performs CSMA (Carrier Sense Multiple Access) communication; in the third period, it can perform CSMA communication with more than one of the plurality of information terminals; and the second period and the third period are used for each other Communication of different types of information.

In addition, any combination of the above constituent elements, the expression of the present disclosure, and the conversion between methods, devices, systems, recording media, computer programs, etc. are also valid as aspects of the present disclosure. [Effects of the invention]

According to the present disclosure, the communication efficiency of the walkie-talkie system can be improved.

Before describing this disclosure in detail, a summary is described. The embodiment relates to an intercom system installed in a collective facility such as an apartment or a hotel. A facility that gathers multiple residences in a gathering facility and allows people to enter and exit through at least one common entrance. The visitor operates the common entrance device such as the intercom installed in the front hall of the common entrance to call the information terminal installed in the facility at the visitor's destination. The information terminal is, for example, a facility host. If the resident of the facility responds to the call and operates the information terminal to answer the call, the call communication is performed between the common entrance device and the information terminal. In order to realize the call communication, the common entrance device and the plurality of information terminals are connected to the control device. In this type of intercom system, inter-facility communication and non-communication may be performed as described above. In inter-facility calls, two or more information terminals communicate via the control device. In non-call communication, non-call information is sent from the information terminal to the control device.

If comparing call calls, inter-facility calls, and non-inter-facility calls, it is as follows. Since calls have the highest priority among these communications, high-quality and low-latency communications are required. Furthermore, a call request that triggers the start of the call conversation is sent from the control device to the information terminal. Inter-facility calls are communications that have a lower priority than outbound calls, but require high quality and low latency communications. Furthermore, a call request that triggers the start of the inter-facility call is sent from the information terminal to the control device. Since non-call communication does not require real-time performance, it is the communication with the lowest priority. Since each information terminal performs transmission independently, the traffic volume may also increase sharply when transmission is concentrated.

In order to improve communication efficiency in the communication between such a control device and an information terminal, in this embodiment, a cycle with a specific period is repeatedly set. The cycle is divided into a first period, a second period, and a third period. The first period is a period during which TDMA communication can be performed, and the second period and the third period are periods during which CSMA communication can be performed. The call call is executed by the control device allocating the communication time slot set in the first period to the information terminal. Furthermore, in the inter-facility call, the connection process starting from the call request is executed in the second period. After the connection is completed, the inter-facility call is executed by the control device allocating the communication time slot set in the first period to the information terminal. In addition, non-call communication is performed in the third period.

Figure 1 shows the structure of an intercom system 1000. The collective facility 100 includes a first facility 110a, a second facility 110b, and a third facility 110c collectively referred to as facilities 110. The intercom system 1000 includes a common entrance device 200, a control device 300, a gathering facility GW (GateWay: gateway) 310, a network 320, a server 330, a shared trunk line 350, an occupied trunk line 360, and an intra-facility network 380. The first information terminal 400a and the second information terminal 400b of the information terminal 400 are collectively called the first device control device 600a and the second device control device 600b of the device control device 600. The first information terminal 400a and the first device control device 600a are installed in the first facility 110a, and the second information terminal 400b and the second device control device 600b are installed in the second facility 110b. Similarly, a third information terminal 400c (not shown) and a third machine control device 600c (not shown) are installed in the third facility. The number of facilities 110 in the collective facility 100 is not limited to "3". Here, (1) the basic operation of the walkie-talkie system 1000 and (2) the details of the communication processing of the walkie-talkie system 1000 are described in order.

(1) Basic operations of intercom system 1000 In the gathering facility 100, a plurality of facilities 110 are gathered. An example of the collective facility 100 is an apartment, and an example of the facility 110 is a residence. A common entrance device 200 is installed at the common entrance of the gathering facility 100 . The common entrance device 200 is, for example, installed in the front hall intercom of an apartment. 2(a)-(b) show the structure of the common entrance device 200 and the information terminal 400. Figure 2(a) shows the structure of the common entrance device 200. The common entrance device 200 includes a processing unit 210, an operation unit 230, a control unit 240, and a communication unit 250. The processing unit 210 includes a camera unit 212, a microphone 214, a speaker 218, a monitor 220, and an IF unit 222.

Here, the call call will be explained first. The operation unit 230 of the common entrance device 200 is a user interface for receiving operations from visitors, that is, for example, a call button. When the operation unit 230 receives the serial number of the facility 110 scheduled to be visited from the visitor, the operation unit 230 outputs the call request to the control unit 240 . Moreover, if the operation part 230 is operated by a visitor, the processing part 210 will operate.

The camera unit 212 is used to take pictures of visitors and includes solid-state imaging elements such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor and a CCD (Charge Coupled Device) image sensor. The solid-state imaging device outputs a photoelectrically converted image signal to the IF unit 222 . The IF unit 222 performs various signal processing on the image signal from the imaging unit 212 . Since well-known techniques can be used for various signal processing, descriptions thereof are omitted here. The IF unit 222 outputs the image signal (hereinafter, also referred to as an “image signal”) subjected to signal processing to the control unit 240 .

The microphone 214 and the speaker 218 are used as a user interface for visitors to communicate with residents. The microphone 214 collects the visitor's voice, converts it into an electrical signal, and outputs it to the IF unit 222 . The speaker 218 plays the electrical signal from the IF unit 222 and outputs sound. The IF unit 222 receives the electrical signal from the microphone 214 and converts it into a signal in a form for transmitting the electrical signal (hereinafter referred to as "sound signal"). The IF unit 222 outputs the sound signal to the control unit 240 . On the other hand, the IF unit 222 inputs the audio signal from the control unit 240 and converts the audio signal into an electrical signal. The IF unit 222 outputs electrical signals to the speaker 218 .

The monitor 220 displays messages and the like. The IF unit 222 inputs a message signal from the control unit 240 and outputs the message signal to the monitor 220 . The message signal can also be generated at the common entrance device 200. The control unit 240 controls the operation of the common entrance device 200 . The control unit 240 is connected to the communication unit 250 . The communication unit 250 is connected to the control device 300 via the common unit trunk line 350, and communicates with the information terminal 400 via the control device 300. To be specific, the communication unit 250 and the information terminal 400 transmit and receive the above-mentioned call request, video signal, audio signal, and message signal, but the signals transmitted and received are not limited to these. Return to Figure 1.

The common trunk line 350 and the occupied trunk line 360 are transmission paths for transmitting call requests from the common entrance device 200, response signals from the information terminal 400, and the like. The above-mentioned call request, video signal, voice signal, and message signal are transmitted to the shared trunk line 350 and the occupied trunk line 360.

The control device 300 is installed in a common space such as a machine room or a manager's room, and controls communication between the common entrance device 200 and a plurality of information terminals 400 . For example, the control device 300 relays signals between the common entrance device 200 and the information terminal 400 . Figure 3 shows the structure of the control device 300. The control device 300 includes a network communication unit 520, a control unit 540, a common trunk communication unit 550, an occupied trunk communication unit 560, and a memory unit 570. The common trunk line communication unit 550 communicates with the common entrance device 200 via the common trunk line 350 . The occupied trunk communication unit 560 communicates with a plurality of information terminals 400 via the occupied trunk 360 . The network communication unit 520 is connected to the gathering facility GW310 and communicates with the network 320 via the gathering facility GW310.

The control unit 540 controls the network communication unit 520, the common unit trunk communication unit 550, and the occupied trunk communication unit 560. For example, when the common trunk communication unit 550 receives a call request, the control unit 540 retrieves the serial number of the facility 110 included in the call request. The memory unit 570 stores a database corresponding to the serial number of the display facility 110 and the identification serial number of the information terminal 400. The control unit 540 obtains the identification serial number of the information terminal 400 corresponding to the retrieved serial number of the facility 110 from the memory unit 570. The control unit 540 uses the information terminal 400 with the obtained identification number as the destination address, and sends the call request to the communication unit 560 that owns the trunk line. Return to Figure 1.

The information terminal 400 is installed in the facility 110 and is also called a home information panel, a resident computer, a resident terminal, a facility host, a living room host, and a home host. Figure 2(b) shows the structure of the information terminal 400. The information terminal 400 includes a processing unit 410, an operation unit 430, a control unit 440, and a communication unit 450. The processing unit 410 includes a microphone 414, a speaker 418, a monitor 420, and an IF unit 422.

The communication unit 450 is connected to the control device 300 via the possession trunk line 360, and communicates with the common entrance device 200 via the control device 300. The control unit 440 is connected to the communication unit 450, and the control unit 440 controls the operation of the information terminal 400. The control unit 440 is connected to the IF unit 422 and the operation unit 430 , and the IF unit 422 is connected to the microphone 414 , the speaker 418 , and the monitor 420 . Here, the microphone 414, the speaker 418, the IF unit 422, and the operation unit 430 are configured similarly to the microphone 214, the speaker 218, the IF unit 222, and the operation unit 230. The monitor 420 displays the image captured by the camera unit 212 of the common entrance device 200 .

The control unit 440 receives the call request, video signal, and audio signal from the common entrance device 200 via the communication unit 450 . When the control unit 440 receives the call request, the call sound is output from the speaker 418 via the IF unit 422 . Then, the control unit 440 displays the image of the video signal on the monitor 420 through the IF unit 422, and outputs the sound of the audio signal from the speaker 418 through the IF unit 422. When the resident who heard the call operates the operating unit 430 to answer the call, the control unit 440 causes the communication unit 450 to communicate with the common entrance device 200 . As a result, by communicating video signals and audio signals between the communication unit 250 and the communication unit 450, communication between the visitor operating the common entrance device 200 and the resident operating the information terminal 400 is performed. Return to Figure 1.

Next, inter-facility calls will be described. Here, it is assumed that the first information terminal 400a calls the second information terminal 400b to perform an inter-facility call. The resident of the first facility 110a operates the operation unit 430 of the first information terminal 400a in order to call the second information terminal 400b. If the operation unit 430 receives the operation, it outputs the call request to the control unit 440 . The call request includes the identification number of the second information terminal 400b. The control unit 440 outputs the call request to the communication unit 450 , and the communication unit 450 sends the call request to the control device 300 via the occupied trunk line 360 .

The main line communication unit 560 of the control device 300 receives the call request from the first information terminal 400a. Under the control of the control unit 540, the occupied trunk communication unit 560 sends the call request to the second information terminal 400b.

The communication unit 450 of the second information terminal 400b receives the call request. When the control unit 440 receives the call request, it outputs a call sound from the speaker 418 via the IF unit 422 . When the resident of the second facility 110b who heard the call operates the operation unit 430 to answer the call, the control unit 440 sends a response signal to the communication unit 450. The communication unit 450 sends the response signal to the control device 300 .

The occupied trunk communication unit 560 of the control device 300 receives the response signal from the second information terminal 400b. Then, the control unit 540 executes the connection process between the first information terminal 400a and the second information terminal 400b. Since the connection processing may be performed based on SIP (Session Initiation Protocol), for example, description is omitted here. After the connection processing is completed, a call is executed between the resident operating the first information terminal 400a and the resident operating the second information terminal 400b.

Furthermore, non-call communication is explained. The communication unit 450 of the information terminal 400 not only occupies the trunk line 360, but is also connected to the intra-facility network 380. The intra-facility network 380 is a network installed in each facility 110 and is connected to the machine control device 600 via a router (not shown). A plurality of devices (not shown) are connected to the device control device 600 via a HAN (Home Area Network). Machinery systems include lighting fixtures and air conditioners. The appliance control device 600 has a function as a HEMS (Home Energy Management Systems) controller, for example, and controls the operation of the appliance.

The machine control device 600 receives instructions from the user to operate the machine, and based on the received instructions, generates control instructions for instructing the operation of the machine. Instructions from the user are received, for example, via a user interface (not shown). The machine control device 600 sends control instructions to the machine. If the machine receives a control instruction from the machine control device 600, it executes actions corresponding to the control instruction. For example, according to the control instructions, the machine is powered on or off.

The machine control device 600 obtains the status of the machine and sends the status of the machine to the information terminal 400 as machine information. The machine information includes the serial number of the facility 110 and the identification serial number of the machine. The communication unit 450 of the information terminal 400 receives the machine information from the machine control device 600 via the in-facility network 380 . Under the control of the control unit 440 , the communication unit 450 sends the machine information to the control device 300 via the occupied trunk 360 .

The possession trunk communication unit 560 of the control device 300 receives the device information from the information terminal 400 via the possession trunk 360 . Under the control of the control unit 540, the network communication unit 520 sends the machine information to the collective facility GW310. The machine information further includes the identification serial number of the collection facility 100 .

The collective facility GW310 is a communication device for connecting the internal control device 300 of the collective facility 100 and the external network 320 of the collective facility 100 . Therefore, the aggregation facility GW310 can be said to relay communications throughout the inside and outside of the aggregation facility 100. Since the server 330 is connected to the network 320, the communication unit 450 of the information terminal 400 can communicate with the server 330 via the control device 300, the aggregation facility GW310, and the network 320. If the server 330 receives the machine information, it establishes correspondence with the identification serial number of the aggregated facility 100, the serial number of the facility 110, and the identification serial number of the machine, and manages the status of the machine.

(2) Details of communication processing of intercom system 1000 The following describes the communication between the control device 300 occupying the trunk line 360 and the plurality of information terminals 400 in detail. In order to occupy the communication processing of the trunk 360, a cycle having a specific period is defined and the cycle is repeated. 4(a)-(b) show the structure of the period specified in the control device 300. As shown in Figure 4(a), the cycle includes the first period, the second period, and the third period in order from the front. Cycle information contains information related to the cycle. The information related to the period is, for example, information related to the length of each of the first period, the second period, and the third period. In addition, the information related to the period may also include information on the information terminal 400 that is the target of one or more communication slots included in the first period.

The first period includes a plurality of communication time slots. Although a plurality of communication time slots are shown as time slots 1 to 7 in Figure 4(a), the number of communication time slots included in the first period is not limited to "7". The control unit 540 of the control device 300 can perform TDMA (Time Division Multiple Access) communication by allocating communication time slots to one or more of the plurality of information terminals 400 . Here, it is assumed that the first information terminal 400a performs a call communication, and the second information terminal 400b and the third information terminal 400c perform inter-facility communication. In addition, the direction of communication from the control device 300 to the information terminal 400 is downlink (DL), and the direction of communication from the information terminal 400 to the control device 300 is uplink (UL).

The video signal from the control device 300 to the first information terminal 400a is stored in the first time slot, the audio signal from the control device 300 to the first information terminal 400a is stored in the second time slot, and the audio signal from the control device 300 to the first information terminal 400a is stored in the fifth time slot. Sound signal to the control device 300. As a result of such allocation, communication between the control device 300 and the common entrance device 200 is executed. The audio signal from the control device 300 to the second information terminal 400b is stored in the third time slot, and the audio signal from the control device 300 to the third information terminal 400c is stored in the fourth time slot. Furthermore, the audio signal from the second information terminal 400b to the control device 300 is stored in the fifth time slot, and the audio signal from the third information terminal 400c to the control device 300 is stored in the sixth time slot. As a result of such allocation, the call between the second information terminal 400b and the third information terminal 400c is executed. Here, the call request sent from the control device 300 to the information terminal before starting the call conversation and the response signal sent from the information terminal 400 to the control device 300 are also sent using the communication time slot.

The second period is a period during which the control device 300 and one or more of the plurality of information terminals 400 can perform CSMA (Carrier Sense Multiple Access) communication. In period 2, signals used to perform connection processing in inter-facility calls are sent via CSMA. The third period is a period during which the control device 300 and one or more of the plurality of information terminals 400 can perform CSMA communication. In the third period, non-call communication signals, such as machine information, are sent via CSMA. That is, the second period and the third period are used for communication of different types of information. Furthermore, the third period may be longer than the second period.

Under the condition that such a cycle is specified, the control unit 540 of the control device 300 performs the communication between the common entrance device 200 and the information terminal 400 when receiving a call request from the common entrance device 200 to the information terminal 400. Communication time slots during period 1 are allocated to the information terminal 400. Furthermore, the occupied trunk communication unit 560 receives a call request from one information terminal 400 to another information terminal 400 in the second period. Then, the control unit 540 sends or receives a signal for executing the connection process between the two information terminals 400 in the second period. After the connection process is completed, the control unit 540 allocates the communication time slot of the first period to the information terminal 400 in order to execute the call between the two information terminals 400 . Furthermore, the occupied trunk communication unit 560 receives non-call information during the third period. The occupied trunk communication unit 560 may also send non-call information during the third period.

The lengths of each of the first period, the second period, and the third period of the cycle are variable. For example, when the number of information terminals 400 performing call calls or inter-facility calls is large, the number of communication time slots is also increased, so the first period is longer. At this time, at least one of the second period and the third period becomes shorter. On the other hand, the control unit 540 may also eliminate the first period from the cycle when there is no information 400 to which communication time slots should be allocated, as shown in FIG. 4(b) . In this case, the second period and the third period are arranged after the period information in the period. The period information shows no period 1.

The subject of the device, system, or method disclosed herein includes a computer. By executing the program on the computer, the functions of the main body of the device, system, or method disclosed herein are realized. A computer has a processor as its main hardware component that operates according to programs. The type of processor does not matter if it can perform functions by executing programs. The processor is composed of one or a plurality of electronic circuits including a semiconductor integrated circuit (IC: integrated circuit) or an LSI (Large Scale Integrated circuit). A plurality of electronic circuits can also be integrated into one chip or provided on a plurality of chips. A plurality of chips can be integrated into one device or provided in a plurality of devices. Programs are recorded on non-transitory recording media such as computer-readable ROM (Read Only Memory), optical discs, hard drives, etc. The program may be stored in the recording medium in advance, or may be provided to the recording medium via a wide area communication network including the Internet.

The operation of the intercom system 1000 constructed as above will be described. FIG. 5 is a sequence diagram showing the communication sequence of the intercom system 1000, especially the communication sequence of inter-facility calls. The first information terminal 400a sends a call request to the control device 300 using CSMA in the second period (S10). In the second period, the control device 300 sends a call request to the second information terminal 400b using CSMA (S12). The second information terminal 400b sends a response to the control device 300 using CSMA in the second period (S14).

The control device 300 and the first information terminal 400a perform connection processing using CSMA in the second period (S16), and the control device 300 and the second information terminal 400b perform connection processing using CSMA in the second period (S18). After the connection process is completed, the control device 300 allocates the communication time slot of the first period to the first information terminal 400a and the second information terminal 400b (S20). The first information terminal 400a and the second information terminal 400b perform a call using TDMA during the first period (S22, S24).

According to this embodiment, since the period including the first period in which TDMA communication can be performed, the second period in which CSMA communication can be performed, and the third period in which CSMA communication can be performed is defined, the first period, the second period, and the third period can be suppressed. The occurrence of signal conflicts between periods. In addition, since the occurrence of signal conflict between the first period, the second period, and the third period is suppressed, the communication efficiency of the walkie-talkie system can be improved. In addition, since the second period and the third period are used for communication of different types of information, even if the communication volume increases in the third period, the impact on the second period can be suppressed.

Furthermore, when a call request is received from the common entrance device 200, since the communication time slot of the first period is allocated to the information terminal 400, the call communication can be performed with high quality and low delay. Furthermore, when a call request is received from the information terminal 400, the communication time slot of the first period is allocated to the information terminal 400 after the connection process is executed in the second period, so that the inter-facility call can be efficiently performed. In addition, since non-call information is received in the third period, non-call communication can be performed efficiently.

In addition, since the lengths of the first period, the second period, and the third period in the cycle are variable, the lengths of the first period, the second period, and the third period can be changed according to the communication volume of each period. Furthermore, since the lengths of the first period, the second period, and the third period are changed according to the communication volume in each period, communication efficiency can be improved. In addition, when there is no information terminal 400 to which communication time slots should be allocated, the first period is eliminated from the cycle, so communication efficiency can be improved.

A summary of one aspect of this disclosure is as follows. A control device (300) of a certain aspect of the present disclosure is used in an intercom system (1000) installed in a collective facility (100) to control a common entrance device (200) and each of the devices installed in a plurality of facilities (110). A control device (300) for communication between information terminals (400), and includes: a communication unit (560) that communicates with each of a plurality of information terminals (400); and a control unit (540) that controls the communication unit (560). The control unit (540) specifies a cycle, and the cycle includes: a first period in which TDMA (Time Division Multiple Access) communication can be performed by allocating communication time slots to more than one of a plurality of information terminals (400); During the 2nd period, it can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of information terminals (400); during the 3rd period, it can perform CSMA communication with more than one of the plurality of information terminals (400). ; And the second period and the third period are used for communication of different types of information.

When the control unit (540) receives a call request from the common entrance device (200) to the information terminal (400), in order to execute the call between the common entrance device (200) and the information terminal (400), the communication in the first period is Time slots are assigned to information terminals (400).

The plurality of information terminals (400) may also include a first information terminal (400) and a second information terminal (400). The communication unit (560) receives the call request from the first information terminal (400) to the second information terminal (400) in the second period, and the control unit (540) executes the operation of the first information terminal (400) and the second information terminal (400). ), different communication time slots in the first period are allocated to each of the first information terminal (400) and the second information terminal (400).

The communications department (560) can also receive non-call information during the third period.

The length of each of the first period, the second period, and the third period in the cycle is variable. The communication unit (560) may also send the first period before the first period, the second period, and the third period during the cycle. Period information related to the length of each period, second period, and third period.

When there is no information terminal (400) to which communication time slots should be allocated, the control unit (540) eliminates the first period from the cycle, and the period information sent from the communication unit (560) shows that there is no first period.

It may also include a common entrance device (200), an information terminal (400) installed in each of a plurality of facilities (110), and a control device (300).

Another aspect of the present disclosure is a control method. This method is to control communication between a common entrance device (200) and information terminals (400) installed in each of a plurality of facilities (110) in an intercom system (1000) installed in a collective facility (100). The control method of the control device (300) specifies a period, and the period includes: a first period, which can execute TDMA (Time Division Multiple) by allocating communication time slots to more than one of a plurality of information terminals (400). Access) communication; in the second period, it can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of information terminals (400); in the third period, it can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of information terminals (400) CSMA communication; and the second period and the third period are used for communication of different types of information.

Another aspect of this disclosure is a common entrance device (200). This device is a common entrance device (200) used in an intercom system (1000) installed in a collective facility (100) to control communication with information terminals (400) installed in each of a plurality of facilities (110). It also includes: a communication unit (250) that communicates with each of the plurality of information terminals (400); and a control unit (240) that controls the communication unit (250). The control unit (240) specifies a cycle, and the cycle includes: a first period in which TDMA (Time Division Multiple Access) communication can be performed by allocating communication time slots to more than one of a plurality of information terminals (400); During the 2nd period, it can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of information terminals (400); during the 3rd period, it can perform CSMA communication with more than one of the plurality of information terminals (400). ; And the second period and the third period are used for communication of different types of information.

It may also include a common entrance device (200) and information terminals (400) installed in each of a plurality of facilities (110).

As above, the present disclosure has been described based on the embodiments. Those skilled in the art will understand that this embodiment is an illustration, and various modifications may be made to the combination of each component or each processing process, and such modifications are also included in the scope of the present disclosure.

The functions of the control device 300 of this embodiment can also be installed on the common entrance device 200 . At this time, the common entrance device 200 is connected to the occupied trunk line 360 and connected to the plurality of information terminals 400 via the occupied trunk line 360 . The processing of the control unit 540 and the occupied trunk communication unit 560 of the control device 300 of the embodiment is executed in the control unit 240 and the communication unit 250 of the common entrance device 200 . According to this variation, the degree of freedom of the structure can be increased.

100:Gathering facilities 110: Facilities 110a: Facility 1 110b: 2nd facility 110c: 3rd facility 200:Common entrance device 210:Processing Department 212:Camera Department 214:Microphone 218:Speaker 220:Monitor 222:IF Department 230:Operation Department 240:Control Department 250: Ministry of Communications 300:Control device 310:Gathering facility GW 320:Internet 330:Server 350: Common trunk line 360: Occupy trunk line 380:In-facility network 400:Information terminal 400a: 1st information terminal 400b: 2nd information terminal 410:Processing Department 414:Microphone 418:Speaker 420:Monitor 422:IF Department 430:Processing Department 440:Control Department 450: Ministry of Communications 520:Network Communications Department 540:Control Department 550:Common trunk line communication department 560:Occupy trunk communications department 570:Memory department 600: Machine control device 600a: 1st machine control device 600b: 2nd machine control device 1000:Intercom system S10: Call request S12: Call request S14: response S16: Connection processing S18: Connection processing S20: Allocate communication time slots S22: Call S24: Call

FIG. 1 is a diagram showing the structure of the intercom system of the embodiment. Figures 2(a)-(b) are diagrams showing the composition of the common entrance device and information terminal in Figure 1. FIG. 3 is a diagram showing the structure of the control device of FIG. 1 . 4(a)-(b) are diagrams showing the structure of the period specified in the control device of FIG. 1. FIG. 5 is a sequence diagram showing the communication sequence of the walkie-talkie system of FIG. 1 .

300:Control device

520:Network Communications Department

540:Control Department

550:Common trunk line communication department

560:Occupy trunk line communications department

570:Memory Department

Claims (11)

A control device that is used in an intercom system installed in a collective facility to control communication between a common entrance device and information terminals installed in each of a plurality of facilities, and has: A communications department that communicates with each of a plurality of the above-mentioned information terminals; and a control unit, which controls the above-mentioned communication unit; and The above-mentioned control unit specifies a cycle, and the cycle includes: a first period in which TDMA (Time Division Multiple Access) communication can be performed by allocating communication time slots to one or more of the plurality of the above-mentioned information terminals; and a second period in which It can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of the above-mentioned information terminals; in the third period, it can perform CSMA communication with more than one of the plurality of the above-mentioned information terminals; The above-mentioned second period and the above-mentioned third period are used for communication of different types of information. The control device of claim 1, wherein when the control unit receives a call request from the common entrance device to the information terminal, in order to execute the call between the common entrance device and the information terminal, the communication in the first period is Time slots are allocated to the above information terminals. Such as the control device of claim 1 or 2, wherein The plurality of above-mentioned information terminals include a first information terminal and a second information terminal; The above-mentioned communication unit receives a call request from the above-mentioned first information terminal to the above-mentioned second information terminal during the above-mentioned second period; In order to execute the call between the first information terminal and the second information terminal, the control unit allocates the communication time slots in the first period that are different from each other to each of the first information terminal and the second information terminal. The control device of claim 1 or 2, wherein the communication unit receives non-call information during the third period. Such as the control device of claim 1 or 2, wherein The lengths of each of the above-mentioned first period, the above-mentioned second period, and the above-mentioned third period of the above-mentioned period are variable; In the above period, the communication unit transmits period information related to the length of each of the above first period, the above second period, and the above third period before the above first period, the above second period, and the above third period. The control device of claim 5, wherein the control unit eliminates the first period from the period when there is no information terminal to which the communication time slot should be allocated; The above-mentioned cycle information sent from the above-mentioned communication department shows that there is no situation in the above-mentioned first period. An intercom system having: The above common entrance device; The above-mentioned information terminals are installed in each of the plurality of facilities mentioned above; and Such as the control device of claim 1 or 2. A control method for a control device that controls communication between a common entrance device and information terminals installed in each of a plurality of facilities in an intercom system installed in a collective facility; and A prescribed period, which includes: the first period, which can perform TDMA (Time Division Multiple Access) communication by allocating communication time slots to more than one of a plurality of the above-mentioned information terminals; the second period, which can communicate with a plurality of information terminals One or more of the above-mentioned information terminals performs CSMA (Carrier Sense Multiple Access) communication; in the third period, it can perform CSMA communication with one or more of the plurality of the above-mentioned information terminals; The above-mentioned second period and the above-mentioned third period are used for communication of different types of information. A program that is executed in an intercom system installed in a collective facility, in a control device that controls communication between a common entrance device and information terminals installed in each of a plurality of facilities, and has the following steps: Communicate with each of a plurality of the above information terminals; and control the above communications; and The above-mentioned control steps define a cycle, and the cycle includes: a first period in which TDMA (Time Division Multiple Access) communication can be performed by allocating communication time slots to more than one of a plurality of the above-mentioned information terminals; a second period, It can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of the above-mentioned information terminals; during the third period, it can perform CSMA communication with more than one of the plurality of the above-mentioned information terminals; and The above-mentioned second period and the above-mentioned third period are used for communication of different types of information. A common entrance device, which is used in an intercom system installed in a collective facility to control communication with information terminals installed in each of a plurality of facilities; and has: A communications department that communicates with each of a plurality of the above-mentioned information terminals; and a control unit, which controls the above-mentioned communication unit; and The above-mentioned control unit specifies a cycle, and the cycle includes: a first period in which TDMA (Time Division Multiple Access) communication can be performed by allocating communication time slots to one or more of the plurality of the above-mentioned information terminals; and a second period in which It can perform CSMA (Carrier Sense Multiple Access) communication with more than one of the plurality of the above-mentioned information terminals; in the third period, it can perform CSMA communication with more than one of the plurality of the above-mentioned information terminals; The above-mentioned second period and the above-mentioned third period are used for communication of different types of information. An intercom system having: Such as requesting a common entrance device in item 10; and The above-mentioned information terminal is installed in each of the plurality of facilities mentioned above.