JP2579067B2 - Incoming terminal designation method and communication terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a destination terminal specifying method for specifying a terminal to receive a call using a destination specifying code such as a destination subaddress of an integrated services digital network (ISDN), and a communication used for implementing the method. Regarding communication terminals. The method and apparatus according to the present invention can be applied to an ISDN terminal such as a terminal adapter in ISDN.

[0010]

2. Description of the Related Art Conventionally, IS used in ISDN
The DN address includes an ISDN subaddress, and by using the ISDN subaddress, for example, a terminal adapter can designate one of a plurality of terminals accommodated in the terminal adapter as an incoming call. This incoming call designation specifies each of the plurality of terminals with a different subaddress.

[0020]

In the case of this individual subaddress, it is not possible to make any one of the plurality of terminals receive a call without specifying the receiving terminal. In order to do this, it is conceivable that the same sub-address is given to all the accommodated terminals on the receiving side. Can not be used properly when you want to receive a call to another terminal. The present invention has been made in view of the above circumstances, and an object of the present invention is to allow a plurality of terminals on a receiving side to be individually and comprehensively specified to receive a call.

[0030]

FIG. 1 is an explanatory view of the principle according to the present invention. Called terminal specifying method according to the present invention, each terminal G ₁ ~G _n each is assigned a prime number E ₁ to E _n, in the originating side, the wish to the called terminal has been assigned to these terminals when the plurality prime send a designation code X wear obtained by multiplying, by the called party, so as to determine the incoming target terminal wearing designation code X contained in the communication information by whether divisible by the prime E ₁ to E _n It was made.

In the method for specifying a called terminal according to the present invention, in the method for specifying a called terminal according to the above-described embodiment, priorities are set for the respective terminals. The terminal is selected to receive a call. The receiving terminal designation method is ISD
N, in which case the destination designation code is a destination subaddress in ISDN. The communication terminal according to the present invention, each terminal G ₁ to ~G _n are respectively assigned prime E ₁ to E _n, which wants to call the terminal is multiplied by the prime number assigned to these terminals when a plurality Is transmitted as a destination designation code X.

Further communication terminal according to the present invention, each terminal G ₁
~G _n each is assigned a prime number E ₁ to E _n in, at the time of incoming, the intended recipient by determining whether the destination specified code X contained in the communication information divisible at their prime E ₁ to E _n It has a function of determining a terminal.

[0040]

[Action] In the calling side, when it is desired to the called terminal is more in G _i ~G _j as wear designation code X, multiplying their terminal G _i ~G prime assigned to _j E _i to E _j Set and send a call. That is, X = E _i × E _{i + 1}
It is transmitted as × E _{i + 2} × jE _j . On the receiving side, the destination designation code X is divided by the prime numbers assigned to the terminals G _{1 to} G _n, and the terminal to which the prime number that has successfully eliminated the destination designation code X has been assigned is designated as the receiving terminal. It is determined that there is. Incidentally, for example when it is desired to call only to the terminal G _i is wearing designation code X is transmitted as X = E _i.

[0050]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of the present invention. This embodiment relates to ISDN primary rate interface communication, and includes a terminal adapter provided on a terminating side.
This is an example of a case where one or more TV conference devices are individually or comprehensively designated to receive a call. 2, reference numeral 1 denotes the called terminal adapter, 2 ₁ to 2 ₃ is three TV conference device which is accommodated in the receiving terminal adapter 1, 3 originating terminal adapter 2 ₄ calling terminal adapter 3 a TV conference device 2 ₄ accommodated in. Here, the receiving side terminal adapter 1 and the calling side terminal adapter 3 can be mutually connected via the INS network. The caller terminal adapter 3 makes a call using the called address, and the called address is XXX-XXXX-SAR.
The last SAR is a destination subaddress. The called party of the TV conference device 2 ₁ to 2 ₃ are given destination port number of distinct primes respectively. That is,
TV conference device 2 ₁ is a prime number E _1, TV conference device 2 ₂ is a prime number E _2, TV conference device 2 ₃ and has a port number wearing the prime number E _3. As the prime numbers, for example, (E ₁ , E ₂ ,
E ₃ ) = (3, 5, 7).

FIG. 3 shows a configuration example of the terminal adapter. In the figure, reference numerals 21 to 26 denote 1.544 Mbps / 384 kbps speed conversion buffers, 27 denotes a multiplexer having an ISDN layer 1 function for multiplexing D channels and B channels, and 28 denotes an ISDN layer 1 function having a D function. channel,
A demultiplexer for separating the B channel, a LAPD circuit 29 for performing D channel synchronization processing and having a layer 2 function, and a CPU 20 for executing a transmission / reception protocol and having a layer 3 function. The operation of this embodiment system will be described below. Now, a TV conference system 2 ₄ of the calling terminal adapter 3 side, the receiving terminal adapter 1 side TV conference device 2 ₁
It shall be connected to any of _~ 2. First, to specify the TV conference device 2 ₁ to 2 ₃ respectively as the called terminal individually, as subaddress SAR in destination address, the TV conference device 2 _1, 2 _2, 2 ₃ assigned wearing port The numbers E ₁ , E ₂ and E ₃ are used, respectively. For example, if you want only to arrive at the TV conference device 2 _1, the subaddress SAR, is set to SAR = E _1, originates a call from the calling terminal adapter 3 side. The receiving side terminal adapter 1 sees the destination subaddress SAR and determines that the received
Determines that a call request to the V conference device 2 _1, TV
Connecting the incoming call to the port corresponding to the conference device 2 _1.

Next, when it is desired to a called terminal adapter 1 side of the TV conference device 2 ₁ to 2 ₃ to the receiving terminal to any one of them without specifying individually (i.e. if you want to specify generically) It is a calling terminal adapter 3 side, and the TV conference device 2 ₁ to 2 ₃ of the destination port number E _1, E _2, E ₃ wear value obtained by multiplying the sub-address SAR. That is, S
Set AR = E ₁ * E ₂ * E ₃ and make a call. Here, the mark * indicates multiplication. In the receiving terminal adapter 1 side examines the subaddress SAR in the received information, the subaddress SAR, accommodating to the TV conference device 2 ₁ -
2 ₃ destination port number E ₁ to E ₃ divides each. As a result of this division, if there is no remainder, that is, if the division can be performed, the T which is assigned the deallocated destination port number is assigned.
It is determined that the V conference device is specified as the receiving terminal. That is, the receiving-side terminal adapter 1 sets (SAR) mo
Only the TV conference device 2 _n that satisfies d (E _n ) = 0 is given a reception permission. In this case, since divisible either prime E _1, E _2, E _3, so that none of the TV conference terminal 2 ₁ to 2 ₃ can be called.

[0053] Similarly, the calling terminal adapter 3, when excluding the called terminal adapter 1 side of the TV conference device 2 ₃ wants to call to any of the TV conference device 2 _1, 2 _2, subaddress SAR Is set as SAR = E ₁ * E ₂ . The called party terminal adapter 1, can not be divisible in port E ₃ wearing a subaddress SAR, the TV conference device 2 ₃ can determine that it is not designated as the receiver terminal, whereas, the destination port number E _1, E ₂ since either divisible, it can determine that the TV conference device 2 _1, E ₂ is designated as both the receiving terminal.

When a plurality of terminals are designated as receiving terminals, there are various methods for selecting one of them to receive a call. For example, one of them may be selected at random and received. Alternatively, priorities may be assigned to the terminals in advance, and terminals may be selected according to the priorities and received. In this case, if a terminal with a higher priority is communicating, a terminal with a lower priority is selected and received. FIG. 4 shows a receiving-side terminal adapter 1 when the receiving terminal is selected by setting such priorities.
6 is a flowchart showing a processing procedure in step S1. In this example, it is assumed that N terminals 2 ₁ to 2 _N are accommodated in the terminating-side terminal adapter 1, and the terminals are numbered 1 to N, and the priority is higher in ascending order. Shall be. Also, terminal 2 _i
Is assumed to be _Ei . i is 1 to N.

First, i = 1 is set (step S1).
It is determined whether (SAR) mod (E _{i = 1} ) = 0 (step S2). When it becomes 0, the terminal 2 ₁
Can be determined to be designated as a receiving terminal. So then the terminal 2 ₁ determines whether or not the communication (step S
3). If in communication, to call to the terminal 2 _1.
When the terminal 2 ₁ is in communication, it is not possible to call it, i is checked whether or not in the final value N (step S5), and if not the final value N, one increments i by (step S6), and then the higher priority terminal 2 ₂ judges whether it is designated as the incoming terminal (step S2). If (SAR) mod (E ₁ ) is not 0 in step S2, the terminal 2
Since ₁ is not designated as the receiver terminal, performs the same processing for the terminal 2 ₂ performs increment of the same number. Hereinafter, in the same manner, a terminal that is designated as a receiving terminal and is not communicating is searched for and made to receive a call.

In implementing the present invention, various modifications are possible. FIG. 5 shows such a modification.
This is a case where the present invention is applied to a network that enables a TV multipoint conference. In the figure, 3A, 3B, 3
C is a transmitting terminal adapter installed at point A, B, and C, respectively, and 2A, 2B, and 2C are TV conference devices accommodated in terminal adapters 3A, 3B, and 3C, respectively. 1D is a terminating terminal adapter installed at point D, which has three ports, and each port is assigned a prime number E ₁ , E ₂ , E ₃ as a subaddress. Reference numeral 5 denotes a TV conference multipoint control device accommodated in the terminal adapter 1D. The TV conference multipoint control device 5 has three ports, and these ports are connected to the terminating terminal adapter 1D.
Connected to each of the three ports. The TV conference multipoint control device 5 is connected to any of these ports by using the T
The control is performed so that a TV multipoint conference can be performed between the V conference devices. Therefore, if the TV conference devices 2A, 2B, and 2C are connected to the three ports, control is performed so that a multipoint conference is performed between them. In this case, which TV conference apparatus is connected to which port is arbitrary.

Therefore, when a multipoint conference is to be held between the TV conference devices 2A, 2B, and 2C at the respective points A, B, and C, each of the calling terminal adapters 3A, 3B, and 3C is required.
C is the destination subaddress SAR, and SAR = E ₁ * E ₂
* Set the E ₃ to send to point D through the INS network.
The receiving side terminal adapter 1D at the point D stores the destination sub-address from each point as the destination port number E ₁ , E of any of the ports.
Since divisible even at _2, E _3, can not determine its incoming and is connectable to any of the ports, thus these A,
Incoming calls from points B and C are connected to any of the three ports of the TV conference multipoint controller 5. Thus, the TV conference devices 2A, 2B, and 2C can hold a TV multipoint conference under the control of the TV conference multipoint control device 5 via the ISN network.

[0060]

As described above, according to the present invention, when there are a plurality of terminals on the receiving side, it is possible to individually specify these terminals for receiving, or as a comprehensive receiving terminal group. It is also possible to specify.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the principle according to the present invention.

FIG. 2 is a block diagram showing a communication system as an embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration example of a terminal adapter in the system according to the embodiment.

FIG. 4 is a flowchart showing a processing procedure in a receiving-side terminal adapter in the system of the embodiment.

FIG. 5 is a block diagram showing a communication system as another embodiment of the present invention.

[Explanation of symbols]

1,1D: the called terminal adapter 2 ₁ ~2 ^4, 2A~2C: TV conference system 3,3A～3C: calling terminal adapter 5: TV conference multipoint control unit 21-26: speed translation buffer 27: Multiplexer 28: Demultiplexer 29: LAPD circuit 20: Central processing unit (CPU)

Claims (5)

(57) [Claims] 1. A prime number (E ₁ -E _n ) is assigned to each terminal (G ₁ -G _n ), and a calling side multiplies a prime number assigned to each of the terminals when there are a plurality of terminals to be received. Is transmitted as a destination designation code (X),
A receiving terminal specifying method in which a receiving side determines a receiving target terminal based on whether or not the destination specifying code included in the communication information can be divided by the prime number. 2. Each terminal has a priority set,
2. The receiving terminal specifying method according to claim 1, wherein one of the terminals to be received is selected according to the priority order, and the incoming call is received. 3. The receiving terminal specifying method according to claim 1, wherein the destination specifying code is a destination subaddress in ISDN. 4. Each terminal (G ₁ -G _n ) is assigned a prime number (E ₁ -E _n ), and when there are a plurality of terminals to be called, the product is multiplied by a prime number assigned to those terminals. A communication terminal having a function of transmitting a call as a destination designation code (X). 5. Each terminal (G ₁ -G _n ) is assigned a prime number (E ₁ -E _n ), and at the time of an incoming call, can the incoming call designation code contained in the communication information be eliminated by the prime number? A communication terminal having a function of determining a terminal to be received based on whether or not it is received.