JPS63222538A - Information communication network - Google Patents

Abstract

PURPOSE:To attain the communication in one and same LAN even at the fault of a PBX by connecting the LAN and a centralized control exchange PBX directly and using exchange function of the LAN for the information transmission/reception and connection/disconnection between equipments in the same LAN so as to avoid the load concentration to the PBX. CONSTITUTION:A decentralized control type LAN (Local Area Network) and a centralized control PBX are connected directly and the communication among entire information processing units DTE is executed by a unified procedure. Since the incoming and disconnection procedure between the PBX and the incoming DTE and the disconnection and call procedure between a caller DIE and the PBX are identical, the opposite party of the network user is selected while being unified with the subscriber number of the PBX and it is not required to recognize the LAN address of the opposite DTE. Moreover, the connection/disconnection and transmission/reception of information packet are executed by using an exchange function of the LAN in case of within the same LAN. Thus, it is possible to concentrate the load onto the PBX and even when the PBX is disabled of use due to a fault, the connection/disconnection and information packet transmission/reception between the DTE in the same LAN are enabled.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to various local area networks (LANs) used in office information systems (OA), factory information systems (FA), etc., and telephone and data communication systems. This relates to an information communication network connected to a private branch exchange (PBX).

[Conventional technology]

Conventionally, a distributed control LAN and a centrally controlled PBX, each having its own switching function, have different switching control methods, and therefore cannot be directly connected, but instead are connected via a gateway device. In this case, the user needs to take different measures such as using different partner selection methods for communication within the same LAN and communication outside the LAN via the gateway, so the user is required to Same LAN for communication
Efforts were made to have the gateway control the communication so that it appeared to be internal communication. In addition, a network that can execute unified procedures between information processing equipment (DTE) that constitutes a data terminal device is a LAN that does not have an exchange function by itself.
This was possible by connecting the DTE to a PBX, but since that network was also one centralized control type, all communication between DTEs had to go through the PBX.

[Problem that the invention seeks to solve]

In the conventional technology described above, since the connection between the decentralized LAN and the centrally controlled PBX is done via a gateway, the processing time and cost of the gateway are more problematic than direct connections, and the user Also, if communication with a person outside the LAN is disguised as communication within the same LAN, the other party D outside the LAN
In order to make the TB appear as a DTE within the LAN, the original LA
The number of possible DTE connections within N is reduced by the number of required DTEs outside the LAN, and the LAN does not have switching functionality by itself.
Even in the case of a network that executes a unified procedure realized using There were drawbacks such as:

The purpose of the present invention is to eliminate such conventional drawbacks, directly connect a decentralized LAN and a centrally controlled PBX, perform communication between all DTEs using a unified procedure, and communicate within the same LAN. For communication between DTEs, each DTE directly performs call disconnection control and information communication, thereby providing an information communication network that does not place a large load on the PBX and enables communication within the same LAN even in the event of a PBX failure. It's about doing.

[Means for solving problems]

The present invention relates to a PBX and a DTE connected to it.

In an information communication network consisting of a LAN and a DTE connected to the LAN, the DTE connected to the LAN is
When a TE makes a call, it sends a call request packet to all other DTEs and PBXs in the same LAN via the LAN, regardless of the location of the destination DTH, and calls from the DTEs in the same LAN via the LAN. A call request response packet is sent to the DTE within the same LAN, an incoming call acceptance packet is sent to the PBX, and a disconnection request packet is sent to the DTE within the same LAN via the LAN.
A means of sending to TE or PBX and D within the same LAN.
The call request packet from the TE and the call notification packet from the PBX are received via the LAN, and the DTE within the same LAN
The response packet to the call request from the PBX and the call completion notification packet from the PBX are received via the LAN, and the same LA
The disconnection request packet from the DTE and PBX in N is sent to the LAN.
a means for determining whether a received call notification packet from a PBX or a call request packet from a DTE within the same LAN is addressed to the user, and a response to the call request if the packet is addressed to the user. A means for displaying one's own LAN address in a packet or an incoming call acceptance packet, and a means for displaying the other party's LAN address in a response packet to the call request or in the call completion notification packet after the connection is completed.
In a PBX, the calling DTE and the called DTE are connected to the same LAN.
connection management means for determining whether the incoming call
Means for sending the same incoming call notification packet to all DTEs in the LAN to which the TE belongs via the LAN, and when both the calling and called DTEs belong to different LANs and the other party D
If the TE is directly connected to the PBX, the PB is sent with a call completion notification packet.
and means for notifying the calling DTE of the LAN address of X.

Furthermore, in the information communication network of the present invention, the calling DTE
Call disconnection and information packet transmission procedures between P and PBX;
The incoming call disconnection and information packet transmission procedures between the BX and the incoming DTE are completely the same, and the incoming and outgoing call disconnection and information packet transmission and reception do not go through the PBX within the same LAN, but between different LANs or between DTEs directly connected to the PBX. Via PBX,
Communicate using the same procedure.

[Effect]

According to the information communication network of the present invention, since the call origination and disconnection procedures between the calling DTE and PBX and the call reception and disconnection procedures between the PBX and the called DTE are the same, network users can centralize their subscriber numbers to the PBX. This eliminates the need to know the LAN address of the other DTE. In addition, connection disconnection and information packet transmission/reception are performed on the same LAN.
Since the exchange function of the LAN is used within the PBX, it is possible to avoid concentrating the load on the PBX, and the PBX
Even if the DT becomes unusable due to a failure, etc., the DT within the same LAN
Connection disconnection and information packet transmission/reception between E is possible. Furthermore, the information packet transmission/reception procedure is also performed between the transmitting DTE and PB.
Since it is the same between X and between PBX and receiving DTE, each DTE
In this case, all procedures higher than the link level procedure defined by the LAN to which the user belongs can be made the same regardless of the partner DTH. In addition, the switching function provided by the PBX enables network construction not only by packet switching but also by circuit switching.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of the configuration of a network realized by the present invention. DTEl and 2 are connected to LANI, DTE4 and 5 are connected to LAN2, and PB
DTE3 is directly connected to X. In the figure, 00,0
1,02.03 represents the LAN address, 0101,0
102,0103,0104.0105 are respectively DT
EI represents PBX subscriber numbers of 2, 3, and 4.5.

FIG. 2 shows a means for implementing the present invention in a DTE connected to the LAN in FIG.

FIG. 3 shows a means for implementing the present invention in the PBX shown in FIG.

FIG. 4 is a diagram illustrating the positioning of the communication procedure according to the present invention executed in the network of FIG. 1 using the ISO O8■ model. Physical level and data link level procedures are defined in each LAN, and in the case of a PBX line, for example, CCITT is defined at the physical level.
X, 21 physical level to HDLC to data link level
Use procedures. Since the steps above transport are not directly related to the present invention, a description thereof will be omitted, but procedures defined by O8I or procedures defined by each company or others can be used.

5 and 6 illustrate the procedure laid out in FIG. 4.

Descriptions used to explain the procedures shown in FIGS. 5 and 6 are shown in the following table.

According to the above table, the procedural elements shown in FIGS. 5 and 6 are as follows: The first term indicates the packet type, the second term indicates the LAN address (data link address) of the DTH to which the packet is sent, and
The third term means information added to each packet. In addition to this, the actual procedure requires the source LAN address, subscriber number, logical channel number to be used, etc.
Well-known matters not directly related to the present invention (for example, CCITX
, 25, etc.), so the explanation will be omitted.

The communication procedure between the DTEI and DTE2 in FIG. 1 can be explained using FIG. 5. When information to be sent to the DTE 2 is generated in the DTEl, the information packet transmitting/receiving means 5 shown in FIG. After being added, the LAN access means 1 connects the LA
Sent to all other DTEs and PBXs within the NI. The procedure corresponds to (■) in FIG. A calling packet that has the broadcast notification address 99 specified by LAN1 as the packet destination LAN address and indicates that the connected party is number 0102 is sent to DTE2 and the PBX;
indicates that the packet is received as an incoming call notification packet. When the DTE 2 receives this packet using the LAN access means 1 and the incoming call notification/call completion notification packet receiving means 3, the self-subscriber number management means 6 knows that it is addressed to itself and uses the LAN address display means 7 to identify the packet. An incoming call acceptance packet having the LAN address of as additional information is sent to the DTEL by the calling/incoming call acceptance/disconnection packet sending means 4 and the LAN access means 1. In the bud 5 diagram, it corresponds to ■,
A packet with an incoming call is sent to DTE 1, with the LAN7 address 00 of destination DTE 1 as the destination LAN address and the LAN address 01 of DTE 2 as additional clarity.
4F in DTEL indicates that it is received as a call completion notification packet. When DTE 1 receives a call completion notification packet through LAN access terminal 1 and call notification/call completion notification packet receiving means 3, DTEI and DTE
This makes it possible to send and receive information packets between the two. In FIG. 5, it can be seen that information packets having the dominant LAN address as the destination LAN address are sent and received, corresponding to cases ① and ②. To end the communication, the information packet transmitting/receiving means 5 of the DTEL activates the call origination/incoming call reception/disconnection packet transmission means 4, and the LAN access means upstream DTE
, is established when a disconnection packet is sent to 2. In Figure 5, it corresponds to ■, and is the destination LAN from DTEl to DTE2.
A disconnection packet with address 01 is shown being sent. In this way, communication between DTEs within the same LAN can be performed without going through a PBX.

The communication procedure between DTEl and DTE5 in FIG. 1 can be explained using FIG. 16. On DTE l: When information is sent to subscriber number 0105, the LAN
A call request packet with I's broadcast notification address 99 as the destination LAN address is sent to the DTE 2 and the PBX (■ in Figure 6), and is received by the basic exchange means 11 via the LAN access means 8 at the PBX. ,DTE-L
The AN connection relationship management means 13 finds that DTEl and DTE5 do not belong to the same LAN1, and the basic exchange means 1
1 connects DTEl and LAN2 via line access means 10.
Set the path to .

Furthermore, the broadcast notification means 9 of the PBX replaces the destination LAN address with the broadcast notification address OO of LAN2,
The LAN access means 8 sends the call notification packet to all DTEs within the LANZ (■ in FIG. 6). Since the subscriber number 0105 in the received call notification packet is its own, the DTE 5 uses its own LAN address 03 as additional information and sends an incoming call acceptance packet to the PBX (■ in Figure 6).
. The PBX replaces the additional information of the call acceptance packet received from the DTE 5 with the LAN address 02 in the PBX OLANI, and sends it to the DTEI as a call completion notification packet (■ in FIG. 6). This completes the call originating/receiving stage between the DTEs, and from then on, information packets are sent and received via the PBX (■ and ■ in FIG. 6). Cutting is done using DTEl
sends a disconnection packet to the PBX, and then the PBX sends a disconnection packet to the DT
This is done by issuing the same disconnection packet to E5 (■ and ■ in Figure 6).

In the above explanation, it is assumed that the procedures for disconnecting incoming/outgoing calls and transmitting/receiving information from the DTE to the PBX and from the PBX to the DTE are the same.
Although I have omitted the details of the fact that it can also be applied in between, for example, C
The packet and data procedures of CITT D
It is also readily apparent that it can be applied between TEs. By using such a procedure, if the procedures at the physical level of the LAN and lines and the data link level are implemented, it is possible to make all procedures at the network level and above the same. Also,
From this, even if the basic exchange function of PBX is line exchange,
Since this procedure can be executed between DTEs, there is no need to ask whether the basic switching function of the PBX is packet switching or circuit switching.

Although one embodiment of the present invention has been described above, for example, simultaneous communication between one DTE and a plurality of partner DTEs, which is impossible in this embodiment, is implemented using a LAN address + logical channel number using a logical channel number. It can be understood that it has extensibility, such as being made possible by managing it in the same way as the LAN address in the example. In addition, calls from DTP within the LAN can be made without using the "broadcast notification" function, as shown in FIG.
, information packet transmitting/receiving means 18, own subscriber number management means 19. In addition to the self LAN address display means 20, D
All DTEs and PBs connected to the LAN to which the TE belongs
Since this is possible by having the LAN address management means 15 in addition to managing the LAN address of X, it can be understood that the present invention is also applicable to a distributed control type LAN that does not have a broadcast notification function.

〔Effect of the invention〕

According to the present invention, a LAN and a PBX are directly connected, and connection disconnection and information transmission/reception can be performed between DTEs within the same LAN using the PBX.
Since the switching function of the LAN can be used without going through the An information communication network that allows communication without knowing the other party's LAN address, allows communication within the same LAN even if the PBX is unavailable due to a failure, and allows all DTEs to perform the same procedures at the network level or above. It becomes possible.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing means for implementing the present invention in a DTE connected to the LAN in FIG. 1, and FIG. 3 is a diagram showing the present invention in the PBX of FIG. 1. Figure 4 is a diagram showing the positioning of the procedures shown in Figures 5 and 6. Figure 5 is a diagram explaining the procedures between DTEs within the same LAN. FIG. 7 is a diagram illustrating another implementation means of the present invention in the DTE connected to the LAN in FIG. 1. 1.8.14...DTE LAN access means 2, 9
...Broadcast notification means 3.16...Incoming call notification/call completion notification packet receiving means 4.17...Calling/incoming call reception/disconnection packet sending means 5.18 ...Information packet transmission/reception means 6.19.
...Self subscriber number management means 7, 12.20...
Self-LAN address display means 10... Line access means 11... Basic exchange means 13... DTE-LAN connection relationship management means 15... Other LAN address management means agent
Patent Attorney Yoshiyuki Iwasa Figure 1 Figure 2 Figure 3 09f41j7'le (LANI
I (LAN21 (Line) This network procedure Figure 4 DTEI DTE2
PBX Map 5 DTEI DTE2 PBX DTE
4 DTE5 wear notification, 00,0105 11111111 dispute ■

Claims (2)

[Claims] (1) Centrally controlled exchange (hereinafter referred to as PBX) and distributed controlled local area network (hereinafter referred to as LAN)
, and an information communication network consisting of the PBX and information processing equipment, etc. (hereinafter referred to as DTE) connected to the LAN, in which one DTE connected to the LAN communicates with another DTE. When making a call, the other party's DTE must be in the same LAN or directly connected to the PB.
A means for sending a call request packet for a destination DTE to all other DTEs and PBXs in the same LAN via the LAN, regardless of whether the DTE is connected to X or in a different LAN; means for displaying one's own LAN address on the computer; a means for determining whether or not the received call notification packet or call request packet is addressed to the user when a call arrives; and a means for determining whether the received call request packet or call request packet is addressed to In the case of a call destination, a means for responding by displaying one's own LAN address in a response packet or incoming call acceptance packet to the call request, and a means for responding by displaying one's own LAN address in a response packet to the call request or in a call acceptance packet, and a means to respond by displaying the own LAN address in the call reception packet, and a means to respond by displaying the own LAN address in the call reception packet. Using the other party's LAN address shown in the response packet to
When the connection with the TE is completed, the PBX has means for transmitting and receiving information packets using the other party's LAN address indicated in the call request packet or the call notification packet, and the PBX determines the connection relationship between each DTE and each LAN. a means for managing the PBX, a means for sending the same incoming call notification packet to all DTEs in the LAN when a call arrives at a DTE in the LAN, a means for displaying one's own LAN address in the packet, and a means for controlling the PBX. When a call is made to another DTE via the PBX, the call completion packet is sent with the LAN address of the PBX displayed, and for the calling DTE, the LAN address shown in the call request packet is used to An information communication network comprising means for performing subsequent communication with a call DTE using a LAN address indicated in an incoming call response packet. (2) In the information communication network according to claim 1, the call origination and disconnection procedures between the calling DTE and the PBX defined by the PBX and the call reception and disconnection procedures between the PBX and the called DTE are made the same. By unifying the call disconnection means between the DTEs in the information communication network, and transmitting the information packet transmission procedure defined by the PBX between the DTE and the PBX, the
By making it the same between the BX and the receiving DTE, the information packet transmission procedure between the DTEs in the information communication network is unified, and the procedure for transmitting information packets between DTEs in the same LAN does not go through the PBX, but between different LANs or with DTEs directly connected to the PBX. PBX between
An information communication network characterized in that the unified procedure is executed via the information communication network.