JPH0870286A - Composite communication system - Google Patents

Abstract

PURPOSE: To realize the use of a channel with a high utilization efficiency in the composite communication system building up a cable telephone system using an idle channel of a network through which video information is propagated. CONSTITUTION: In the case of communication between a mobile communication terminal equipment 111 and a digital telephone set 112, when a request signal is sent to a mobile communication center equipment 103, the mobile communication center equipment 103 makes a request of channel assignment to a communication control central equipment 107 by using a communication time slot. The communication control central equipment 107 discriminates the attribute of a terminal equipment to discriminate number of time slots to be assigned and commands a trunk to be connected. An exchange 102 makes connection to a prescribed opposite party to set up a communication link so as to attain the communication between the mobile communication terminal equipment 111 and the digital telephone set 112.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite communication system for constructing a cable telephone system using an empty channel of a network for transmitting video information such as a CATV network and a television co-listening network.

[0002]

2. Description of the Related Art Conventionally, data communication speeds and communication protocols have been the same in systems using a wired medium. Therefore, the system was designed so that the data transmission at the maximum speed could be realized, and the low-speed data was transmitted by sending dummy information. Therefore, the operation was inefficient in using the line.

[0003]

However, in the above-mentioned conventional method, mobile communication, digital telephone, multimedia such as analog and the like having different speeds and different protocols, and CATV.
When coexisting with, the system was constructed to match the highest speed line, so the number of lines was reduced and actual operation was difficult.

The present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to realize line utilization with high utilization efficiency even in the case of communication with different transmission rates.

[0005]

SUMMARY OF THE INVENTION In order to facilitate the construction of the system for the above purpose, the present invention provides a cable telephone, that is, a mobile communication, with a dendritic network having good workability.
A system is used in which the functions of analog and digital telephones are added, the lines are dynamically variably allocated, and a small number of lines are jointly used to realize multimedia communication.

[0006]

Therefore, according to the present invention, the line control device specifies the trunk for each transmission rate or protocol by using the idle channel of the CATV network in response to the request of each terminal, and the line control device considers it. Time slots can be efficiently arranged by designating time slots, and an efficient transmission line can be established by sharing lines without affecting the video system.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of an embodiment of the composite communication system of the present invention. In FIG. 1, 101 is a bidirectional coaxial line that is a transmission medium, 102 is a known switching device that performs circuit switching of communication signals, 103 is a known mobile communication center device that connects a mobile communication terminal and a switching device, Reference numeral 104 is a digital telephone interface, 105 is an analog telephone interface, 106 is a communication control terminal for designating a channel through which a communication signal flows, and 107 is a communication control central apparatus for allocating a line in accordance with a request from the communication control terminal 106. Ten
8, 109, 110 and 114 are converters for performing time division multiplexing analog to put signals from mobile communication terminals, digital telephones and analog telephones on a transmission medium, 111 is a known mobile communication terminal and 112 is a known digital communication terminal. The telephone 113 is a known analog telephone.

FIG. 2 shows time slots for time division multiple access. For example, if the system clock is 64 QAM (quadrature amplitude modulation), 24 Mbps, and 1 slot is 32 kbps, 750
Can be divided into One is used as a control channel for request / permission, and two or more are used as communication slots. The communication control central unit 107 includes a mobile communication terminal 111, a digital telephone 112,
The necessary time slot is determined and assigned based on the attributes of the analog telephone 113. For example, in the mobile communication terminal 111, 2
8 slots are rounded up to carry out 56 Kbps transmission, 2 slots are carried out to carry out 64 Kbps in the analog telephone 113, and 0.5 slots are allocated to the digital telephone 112 to realize a 14 Kbps telephone.

The communication procedure of the embodiment of the present invention will be described below. (1) The mobile communication terminal 111 sends a request signal to the mobile communication center apparatus 103 when communicating. (2) The mobile communication center apparatus 103 makes a communication request to the conversion apparatus 109. (3) The conversion device 109 is the communication control central device 107 via the coaxial line 101.
Requests line allocation to the communication time slot. (4) The communication control central unit 107 determines the attribute of the terminal connected to the conversion unit 109, determines the number of time slots to be allocated, and instructs the conversion unit 108 the trunk to be connected. (5) Ports of the trunk of the exchange 102 are distinguished by the protocol. (6) The exchange device 102 exchanges the signal received from the conversion device 108 and connects with a predetermined partner. (7) The conversion device 108 multiplexes the information and sends the information as time division information to each mobile communication center device 103, the digital telephone interface 104, and the analog telephone 113 via the coaxial line 101. (8) A communication link between the conversion device 109 and the conversion device 110 is established. (9) The signal is transmitted to the digital telephone 112. (10) Mobile communication terminal 111 and digital telephone 112
Communication between them can be realized.

By doing so, the required number is allocated to each terminal even when communication is required between terminals having different transmission rates, so that the system can be used without waste and with high utilization efficiency.

[0011]

As is apparent from the above-described embodiments, the present invention is capable of widening the area by using CATV as a transmission medium in a system in which a mobile communication system, a digital telephone, and an analog telephone having different data transmission rate communication protocols. Have an effect.

[Brief description of drawings]

FIG. 1 is a system configuration diagram in an embodiment of the present invention.

FIG. 2 is a diagram showing time slots according to an embodiment of the present invention.

[Explanation of symbols]

101 ... Coaxial line, 102 ... Switching device, 103 ... Mobile communication center device, 104 ... Digital telephone interface,
105 ... Analog telephone interface, 106 ... Communication control terminal, 107 ... Communication control central unit, 108, 109, 110,
114 ... Conversion device, 111 ... Mobile communication terminal, 112 ... Digital telephone, 113 ... Analog telephone.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04Q 7/26 7/30

Claims (5)

[Claims] 1. An analog telephone, a digital telephone, and a mobile communication terminal having different data transmission speeds and communication protocols are connected to a trunk of a switching device via a predetermined communication path instructed by a line control device without changing a communication procedure. A composite communication system characterized by connecting, exchanging, and coexisting in the same band using a CATV network as a transmission medium. 2. The composite communication system according to claim 1, wherein the terminal occupies a time slot in accordance with a transmission rate required by each terminal and communicates the value by reporting the value to the center when the terminal starts up. 3. To secure a time slot, a call channel of a common speed is set for line control, and each terminal uses the time slot for line control to ask the line control device for permission to use the line. The composite communication system according to claim 1, wherein proper allocation is performed. 4. The composite communication system according to claim 1, wherein the line control device performs line allocation so that a time slot corresponds to a switching device whose protocol transmission rate matches that of each terminal. 5. The composite communication system according to claim 1, wherein channel allocation is not fixed for each terminal but is checked for each allocation and dynamic variable allocation is performed.