JPS622739A - Multiple dwelling house containing information communication system - Google Patents

Abstract

PURPOSE:To eliminate the effect of the adverse connection loss of a branching device and to omit a repeater and an FM modulation stage, by using a frequency band lower than that of television to perform the transmission of signals through a broad band FS. CONSTITUTION:The signals are transmitted between a communication control part 2 and a communication control part 3 by using a frequency band less than several MHz as a communication line and also applying a base band FSK (frequency shift keying) system. In such a way, no adverse influence is given to the FM and TV broadcasting systems. While the different frequency bands are used for the polling and transmission of information respectively. Thus the independent transmission/reception is possible between the polling signal and data. Therefore a central control station 4 can perform a polling operation (inquiry for presence or absence of request for transmission of information) while carrying out the transmission of information to a terminal having a request for transmission of information. Thus, the request for transmission of information can be accepted at a high speed regardless of the time needed for transmission of information. In such a way, the averaged service activities are attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apartment complex equipped with an information communication system for communicating with common equipment such as a management room and other shared facilities.

[Conventional technology]

In apartment complexes consisting of many units, there are intercoms at the collective entrance, call lines and control lines for calls between each unit, and between the manager and each unit, coaxial cables for common television viewing, and fire and crime prevention cables. An information communication line is required between the manager's office and coexistence facilities and each dwelling unit, such as a reporting line. Traditionally, these are each connected using separate cables. For example, for the control line for communication between the intercom at the collective entrance and each dwelling unit, a system is adopted in which a plurality of lines are used and each dwelling unit is selected by a combination of signals from each line.

[Problem that the invention seeks to solve]

By the way, in apartment complexes, with the progress of the information age, it has become necessary to develop a variety of services based on information and communication in addition to the above-mentioned information and communication. but,
In the conventional system, separate communication lines are installed for each system, resulting in poor scalability. In addition, the installation of communication lines is redundant, which poses many problems in terms of cost.

The present invention solves the above-mentioned problems, and aims to provide an apartment complex equipped with an information communication system that can efficiently communicate information at high speed using fewer communication lines.

[Means for solving problems]

To this end, an apartment complex equipped with the information communication system of the present invention is an apartment complex equipped with an information communication system that performs information communication between the terminals of each dwelling unit and a central control station. A polling line and information transmission line for frequency-shifted signals in a frequency range lower than the TV frequency range are installed between the central control station and the terminals in each residential unit using coaxial cables for common TV viewing. This system is characterized in that the information transmission line is used to sequentially inquire as to whether there is an information transmission request or not, and the information transmission line is used to transmit information to the terminal of the dwelling unit where the information transmission request is made.

[Effect]

In an apartment complex equipped with the information communication system of the present invention, the frequency range lower than the TV frequency range using the coaxial cable for common TV viewing is the range where reverse coupling loss is not effective.
It can be used as a polling line and an information transmission line without providing a repeater at the head end of the coaxial cable, and by converting the pulse signal into a frequency-shifted signal for use, it is possible to eliminate adverse effects on televisions and the like. Also,
Since the inquiry as to whether there is an information transmission request is made separately from the information transmission, the information transmission request can be accepted and accepted at high speed regardless of the time required for information transmission.

Therefore, information transmission requests can be processed in the order of request registration (first come, first served) or priority order, and a variety of services can be provided.

〔Example〕

Examples will be described below with reference to the drawings.

Fig. 1 is a diagram for explaining an embodiment of an apartment complex equipped with the information communication system of the present invention, Fig. 2 is a diagram for explaining an example of a polling method, and Fig. 3 is a diagram for explaining a request management method using a queue. FIG. 4 is a diagram for explaining an example of request management using a table, and FIG. 5 is a diagram for explaining the frame structure of a message. In the figure, 1 is a head end, 2 and 3 are communication control units, 4 is a central control station,
5 shows various terminals, 6 and 7 show branchers, and 8 shows a coaxial cable.

In FIG. 1, a coaxial cable 8 is a coaxial cable for common television viewing that is permanently installed in an apartment complex.
A public antenna (not shown) is connected to end 1, and connected to the management room and each dwelling unit via branchers 6 and 7. Then, the received signal from the public antenna is distributed to each dwelling unit via the head end 1, the coaxial cable 8, and the branch 6.7. In the example shown in FIG. 1, the coaxial cable 8 for common television viewing is used to communicate information using a frequency range other than the television frequency range as a communication line, and therefore each branch 6.7 is equipped with a communication control section. Connect 2 and 3. Communication control unit 2
The central control station 4 is installed in a management room or a common equipment room to constitute a master station, and the communication control section 3 and various terminals 5 are installed in each residential unit to constitute a slave station.

The branch 6.7 connected to the coaxial cable 8 has a reverse coupling loss in order to reduce mutual interference between devices. That is, the signal is transmitted between the head end 1 and the communication control section 2,
Flows between the head end 1 and the communication control unit 3,
There is a flow from the communication control section 2 side to the communication control section 3 side, or from the communication control section 3 side to the communication control section 2 side. This reverse connection.

Combined loss is usually designed for FM and TV frequency bands of 80 MHz or higher for TV communal listening, and 10 MHz.
It is effective for high frequencies above z. Therefore, in an apartment complex equipped with the information communication system of the present invention,
A frequency band below this frequency band, that is, a frequency band below several MHz, is used as a communication line.
By adopting the eying) method and transmitting signals between the communication control section 2 side and the communication control section 3 side, it is possible to prevent an adverse effect on FM broadcasting and television broadcasting. In other words, when information is transmitted using the coaxial cable 8 for common television viewing using pulse signals of "1" and "0", the pulse signal contains high frequency components, so it has a negative effect on FM broadcasting and television broadcasting. However, in the baseband FSK method, there is a frequency shift (FS) in the frequency band of several MHz or less corresponding to the rlJ of information "0", so high frequency components that have a negative effect on FM and TV are Not included.

Further, by assigning different frequency bands to polling and information transmission, the polling signal transmission/reception and the data transmission/reception can be performed independently. Therefore, the central control station 4 performs polling (inquiry as to whether there is an information transmission request) on the one hand, and transmits information with a terminal that has an information transmission request on the other hand.

As a result, the acceptance and acceptance of information transmission requests has no relation to the time required for information transmission, and it is possible to accept and accept requests at high speed and to achieve average service.

Since the master station needs to perform polling and information transmission in parallel, the communication control section 2 is provided with a 2&I transmissor and a receiver. A communication controller controls this to perform smooth polling and information transmission. In addition, this communication controller has a central control station 4.
It has an interface with and handles information transmission requests from various equipment. On the other hand, since the slave station does not need to perform polling and information transmission at the same time, it is only necessary to place one set of transmitter and receiver in the communication control unit 3, and the communication controller controls this and adjusts the carrier frequency. Polling and information transmission are separated by switching. Further, this communication controller has an interface with various terminals 5 and performs transmission processing. The slave station usually sets its transmitting and receiving frequencies to match polling communication, and when there is an information transmission request in response to an information transmission request inquiry from the master station, it responds and adjusts its transmitting and receiving frequencies to the information transmission. After that, when communication permission is granted, information is transmitted (1), and after the information transmission is completed, the transmitting and receiving frequency is returned to polling communication.

Next, an example of a specific procedure will be explained.

In the communication control unit 2 connected to the central control station 4, as shown in FIG. A polling signal with an attached signal) is sent to the coaxial cable 8. In the communication control unit 2 of each dwelling unit, when the receiver receives the polling signal, the addresses are compared and if the addresses match, a polling response signal indicating the presence or absence of an information transmission request is transmitted via the branch 7 to the coaxial cable 8. Send to,
Ignore if the addresses do not match.

The presence or absence of an information transmission request for each dwelling unit is managed using a queue as shown in FIG. 3 or a table as shown in FIG. 4.

When managing the presence or absence of information transmission requests using queues,
As shown in Figure 3, queues Q1 and Q2 of each residential unit (child station)
, Q3 is queued in the request heat using a pointer. Then, according to this order, a polling signal is sent to each dwelling unit, and if the dwelling unit in queue Q2 has a request, that queue Q2 is connected to the request state as shown in FIG. Polling is performed by skipping the dwelling units in queue Q2.On the other hand, for the queues connected to the requesting state, information is transmitted to the corresponding dwelling units in sequence according to the order of connection, and the queue is connected to the requesting heat again. This is a so-called first-come-first-served system because information is transmitted in the order of requested registration.

In addition, when managing the presence or absence of information transmission requests using a table, address A1, A
Flags are set corresponding to 2, A3, . . . .

The flag is set to "0" for a dwelling unit that requires heat, and is set to "1" when there is a request.

Therefore, in polling, each dwelling unit with "0" is inquired about an information transmission request by referring to the flag, and the flag corresponding to the dwelling unit with a request is changed to "1". Further, in information transmission, data is transferred to each dwelling unit of "1" with reference to the flag, and the flag is returned to "0".

In addition, priorities P1, P2,
. . . may be set so that the information is transmitted in the order in which the requests are generated and from the housing unit with the highest priority. In other words, in the case of the example of the queue shown in Figure 3, when connecting the queue to the one with the request, the connection is made to the end of the queue of the same priority in order of priority, and in the example of the table shown in Figure 4, In this case, information is transmitted to each dwelling unit "1" in descending order of priority.

An example of a transmission control procedure that can be applied to the above-mentioned information communication is a high-level data link control procedure (HDLC procedure).
trolprocedures), and FIG. 5 shows its frame structure. The HDLC procedure proceeds in such a way that the master station responsible for controlling the data link transmits a command frame, and the slave station (residential unit) receiving the control transmits a response. Each station has its own address, and the address section of the command frame contains the address of the other station, and the address section A of the response frame.
The own station address is displayed respectively. The type of command/response is indicated by a combination of bits in the control section C. F is a flag sequence, which is used as a frame start and end signal, and a frame synchronization signal between transmission and reception. (2) is an information part, and S is a frame check sequence.

FIG. 6 is a diagram for explaining an example in which the information communication system according to the present invention is applied to an intercom.
12 is a master station, 13 is a slave station, and 15 is a filter. In the example shown in FIG. 6, as mentioned earlier, a coaxial cable for common television viewing is used to connect frequency regions other than the television frequency region to the polling line and the information transmission line.
Additionally, there is an intercom call line. Additionally, a filter 15 is provided between the coaxial cable and the intercom 14.
Connect. When there is a call request from the intercom 11 installed at the collective entrance to the intercom 14 of a dwelling unit, the master station 12 sends a call request to the terminal 13 of the corresponding dwelling unit.
Sends control signals for connection to the call line. The terminal 13 is
This control signal controls the filter 15 to connect the call line, and when the call ends (the intercom hooks up), the filter 15 is controlled again to cut off the call line.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. As described above, the method is not limited to the method of using a coaxial cable for common television viewing, but it is also possible to share a cable used elsewhere and use a non-overlapping frequency band as a communication line. Furthermore, other transmission control procedures may be adopted instead of the HDLC procedure.

(Effects of the Invention) As is clear from the above description, according to the present invention, since signals are transmitted by broadband FSX using a frequency band lower than the frequency band of the television, the influence of reverse coupling loss in the splitter is eliminated. , does not require repeaters,
Also, no FM modulation stage is required. Furthermore, communication request inquiries (polling) can be integrated into one cable.
Since information is transmitted in parallel while performing the above operations, it is possible to reduce equipment costs in apartment complexes. Further, by simply connecting terminals for various services to the communication control unit, services that require information transmission can be easily added and expanded, and communication requests can be received at high speed. It also becomes possible to apply it to apartment complexes that have existing TV common listening equipment.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining an embodiment of an apartment complex equipped with the information communication system of the present invention, Fig. 2 is a diagram for explaining an example of a polling method, and Fig. 3 is a diagram for explaining a request management method using a queue. FIG. 4 is a diagram for explaining an example of request management using a table. FIG. 5 is a diagram for explaining the message frame structure. FIG. 6 is a diagram for explaining the information communication according to the present invention. FIG. 2 is a diagram for explaining an example of applying the method to an intercom. l...Head end, 2 and 3...Communication control unit, 4
... Central control station, 5 ... Various terminals, 6 and 7 ... 9 branch, 8 ... Coaxial cable, 11 and 14 ... Intercom, 12 ... Master station, 13 ... Child Station, 15...
filter. Patent Applicant Shimizu Corporation Patent Attorney Ryukichi Abe Figure 1 Figure 2 Figure 3 (α) (Figure 10 Figure 5)

Claims (3)

[Claims] (1) A housing complex equipped with an information communication system that communicates information between terminals in each dwelling unit and a central control station, where a coaxial cable for common television viewing is connected between the terminals in each dwelling unit and the central control station. A polling line and an information transmission line are set up for frequency-shifted signals in a frequency range lower than the television frequency range, and the central control station uses the polling line to sequentially inquire about the presence or absence of information transmission requests from the terminals in each residential unit. 1. A housing complex equipped with an information communication system, characterized in that the information transmission system is configured to transmit information between terminals in dwelling units that request information transmission using an information transmission line. (2) An apartment complex equipped with the information communication system according to claim 1, wherein information is transmitted in accordance with the registration order of information transmission requests. (3) An apartment complex equipped with an information communication system according to claim 1, characterized in that information transmission is performed in accordance with the registration order of information transmission requests and a preset priority order.