JP2002033766A - System and method for multiplex communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system and a method for multiplex communication, with which real-time data and non-real-time data are efficiently multiplexed on the same network and efficiency in the transmission of non-real-time data is improved, without impairing the real time property of the real-time data. SOLUTION: It is determined whether the frame length of multiplexed data exceeds a prescribed length, and when the frame length exceeds the prescribed length, non-audio system data are divided, so that the frame length can be equal to or shorter than the prescribed length. On the basis of a prescribed header, the divided data are multiplexed and transmitted at the next transmitting time. Then, the multiplexed data are demultiplexed to audio system data and non-audio system data and are respectively transmitted to prescribed audio and non-audio ports.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplex communication system and a multiplex communication method for multiplexing data of, for example, a telephone line or an Ethernet communication line and communicating the data through one communication line.

[0002]

2. Description of the Related Art When constructing a corporate network, real-time data, such as voice, which requires real-time, and non-real-time data, such as FAX data and LAN / control, which allow delay, are integrated on the same network. This is more effective in reducing communication costs.
Therefore, in recent years, in order to realize a communication service in which an IP network and a telephone network are integrated, a voice gateway for performing a communication protocol conversion between the IP network and the telephone network has been developed. In the voice gateway, a low-rate voice codec is applied in consideration of the resistance to delay and packet loss in the IP network. As a specific audio codec, a block encoding method is generally applied. In this case, several tens of bytes of compressed audio data are output from the encoder at intervals of several tens of msec. For example, G
30ms when operating at 6.3 kbps of 723.1
A 24-byte audio data block is generated at a frame interval of ec.

As a protocol stack used for transmitting voice data, IP / UDP (User Datagram) is used.
m Protocol) / RTP (Real Time Protocol). The following problems are conceivable in the transmission of voice IP packets on such a premise.

[0004] Increase in packet overhead: FIG. 29
As shown in the figure, when operating at 6.3 kbps of G723.1, the audio data length is 24 bytes, the RTP header including the audio stream management information such as the audio codec type, time information, sequence number, etc. is 12 bytes, and the UDP The header is 8 bytes and the IP header is 20 bytes.
The overhead in packet transmission increases. In particular, since the access line of the audio gateway on the user side has a narrow band, the transmission efficiency of not only audio data but also LAN data is reduced.

[0005] Increase in routing processing load: Since a large number of IP packets having a short packet length are transmitted to the IP network, the routing processing load on voice gateways, routers, and the like increases.

[0006] In view of the above problems, the following methods are being studied as voice IP packet transmission methods, especially considering the elimination of overhead when transmitting over an IP network.

(A) Proposal 1: As shown in FIG.
A method of embedding a plurality of RTP data in one packet has been proposed by Hitachi, Ltd. (1999, IEICE General Conference SB-6-1).

(B) Proposal 2: Lucent Technologies, Inc. has proposed a method of providing a dedicated header for managing a multiplexed voice channel, as shown in FIG. 31, with one RTP header. I have.

[0009]

However, in each of the above methods, an IP header,
UDP header and RTP header are at least 1 each
First, since it is necessary, there is a problem that overhead is large. In particular, since the access line of the audio gateway on the user side has a narrow band, not only the audio data but also the LA
The problem that the transmission efficiency of N data decreases is not solved by the above proposal.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide real-time data (voice data) requiring real-time data such as voice and LAN / control data. Efficiently multiplex non-real-time data (non-voice data) that allows delay on the same network, especially on a narrow-bandwidth voice gateway access line without impairing the real-time performance of the real-time data. An object of the present invention is to provide a multiplex communication system and a multiplex communication method that can increase the transmission efficiency of real-time data.

[0011]

In order to achieve the above object, according to the present invention, a plurality of communication nodes are mutually connected by a communication line, and each of these communication nodes has at least one data multiplexing device. A multiplex communication system, wherein the data multiplexing device is connected and exchanges data via the communication node, wherein, on the transmission side of the data multiplexing device, transmission data is voice data or non-voice data. Means for determining whether or not the first header is added to the audio data, and a second header is added to the non-audio data based on the determination result. Means for generating multiplexed data including the added audio data and the non-audio data to which the second header has been added; and determining whether the frame length of the multiplexed data exceeds a predetermined length. Means for determining, if the frame length exceeds a predetermined length, means for dividing the non-speech data so that the frame length is equal to or less than the predetermined length; Means for adding a header, and transmitting the multiplexed data having a frame length of the predetermined length or less, and multiplexing and transmitting the non-voice data to which the third header is added at the next transmission. Means for separating the multiplexed data from the transmission partner into audio data and non-audio data based on the first and second headers on the receiving side of the data multiplexing device; A first transmitting means for transmitting the separated voice data to a predetermined voice port; and a second transmitting means for transmitting the separated non-voice data to a predetermined non-voice port. The features.

The voice data includes at least one of voice data and facsimile data.
The non-voice data includes at least predetermined control data, LAN (Local Area Network) data, or W
It is characterized in that any one of AN (Wide Area Network) data is included.

The multiplexed data is generated by adding a multiplex control header to the voice data, facsimile data, LAN data, WAN data, or control data.
It is characterized by being data having a DLC (High Level Data Link Control) multiplex frame.

[0014] The first transmission means obtains the separated audio data by referring to the multiplex control header.
While transmitting to the destination telephone channel as the voice port, the separated facsimile data is obtained by referring to the multiplex control header, and transmitted to the destination facsimile channel as the voice port, and Transmitting means for transmitting the separated LAN data,
Assembling with reference to the multiplex control header and transmitting to the Ethernet port as the non-voice port, and assembling the separated WAN data with reference to the multiplex control header and transmitting to the Ethernet port. It is characterized by.

The maximum value of the frame length is determined by the bandwidth of the communication line.

A plurality of communication nodes are connected to each other by a communication line, and at least one data multiplexing device is connected to each of the communication nodes, and the data multiplexing device exchanges data via the communication nodes. Do
A multiplex communication system having a predetermined network in the communication node, wherein the communication node receives multiplexed data including voice data and non-voice data to which a first control header is added. Means for separating the multiplexed data into the voice data and the non-voice data by referring to the first control header; and separating the multiplexed data into the voice data and the non-voice data after the separation. Adding means for adding a second control header matching the network in place of the first control header, and transmitting voice data and non-voice data to which the second control header is added to the network Means for generating multiplexed data including the audio data and the non-audio data by adding the first control header in place of the second control header; and Chemical day The characterized in that it comprises means for transmitting to the communication line.

The voice data includes at least voice data and facsimile data, and the non-voice data includes at least predetermined control data and LAN data.
(Local Area Network) data, WAN (Wide Area Ne)
twork) data.

The demultiplexing means converts the multiplexed data into the voice data, facsimile data, control data, LAN data,
Data and WAN data, and the adding means separates the voice data, facsimile data,
The l-th data added to the control data and the LAN data.
Except for the multiplex control header as a control header of the second control header, instead of referring to the multiplex control header and a call connection table created by receiving the control data, Protocol) header is added.

[0019] The generating means excludes the IP header of the voice data, facsimile data, control data, and LAN data.
The multiplexed data is generated by adding the multiplex control header with reference to an OfService) field and adding the multiplex control header to the WAN data.

A plurality of communication nodes are mutually connected by communication lines, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a built-in predetermined network and a router device. A multiplex communication system in which the data multiplexing device exchanges data via the communication node;
Voice data, facsimile data,
Means for receiving LAN data from an Ethernet communication line as the circuit network, and means for transmitting voice data, facsimile data, and LAN data to which the IP header is added to the communication line with reference to a routing table; Means for transmitting the voice data, facsimile data, and LAN data received from the communication line to the Ethernet communication line.

In order to achieve the above object, a method according to the present invention provides a method wherein a plurality of communication nodes are mutually connected by a communication line,
At least one data multiplexing device is connected to each of the communication nodes, and the data multiplexing device exchanges data via the communication node. In the transmission step in, whether the transmission data is audio data,
Or a step of determining whether the data is non-voice data, based on the determination result, adding a first header to the voice data, and adding a second header to the non-voice data; Generating multiplexed data including audio data to which the first header is added and non-audio data to which the second header is added; and determining whether a frame length of the multiplexed data exceeds a predetermined length. Determining whether the frame length exceeds a predetermined length, dividing the non-voice data so that the frame length becomes a predetermined length or less, and Adding a third header, transmitting the multiplexed data having a frame length equal to or less than the predetermined length, and adding the third header to the non-voice data. Multiplexing the data at the next transmission and transmitting the multiplexed data from the transmission partner with the voice-based data based on the first and second headers. Separating the non-voice data into non-voice data; transmitting the separated voice data to a predetermined voice port; and transmitting the separated non-voice data to a predetermined non-voice port. It is characterized by.

A plurality of communication nodes are connected to each other by a communication line, and at least one data multiplexing device is connected to each of the communication nodes, and the data multiplexing device exchanges data via the communication nodes. Do
Also, in the multiplex communication method in a multiplex communication system having a predetermined line network in the communication node, the communication step in the communication node may include a step of transmitting voice data and a non-voice data to which a first control header is added. Receiving the multiplexed data including the multiplexed data, referring to the first control header, separating the multiplexed data into the audio data and the non-audio data, and Adding a second control header matching the circuit network to the voice data in place of the first control header, and converting the voice data and the non-voice data to which the second control header has been added. Transmitting to the network, and adding the first control header in place of the second control header to generate multiplexed data including the voice data and the non-voice data. Comprising the steps of, characterized by comprising the steps of: transmitting the multiplexed data to which the generated to the communication line.

A plurality of communication nodes are mutually connected by communication lines, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a built-in predetermined network and a router device. A multiplex communication method in a multiplex communication system in which the data multiplexing device exchanges data via the communication node, wherein the communication step in the router device includes voice data, facsimile data, and LAN data added with an IP header. To
Receiving from an Ethernet communication line as the line network, transmitting voice data, facsimile data, and LAN data added with the IP header to the communication line with reference to a routing table; Transmitting the received voice data, facsimile data, and LAN data to the Ethernet communication line.

In order to achieve the above object, a storage medium according to the present invention comprises a plurality of communication nodes connected to each other via a communication line, and each of these communication nodes is connected to at least one data multiplexer. In a storage medium for storing a program code of a multiplex communication method in a multiplex communication system in which the data multiplexing apparatus exchanges data via the communication node, a code of a transmission step in the data multiplexing apparatus is an audio system. A first header is added to the audio data and a second header is added to the non-audio data based on the code of the step of determining whether the data is data or non-voice data, and the determination result. And the audio data to which the first header is added and the non-audio data to which the second header is added. A code for generating multiplexed data, a code for determining whether or not the frame length of the multiplexed data exceeds a predetermined length, and, if the frame length exceeds a predetermined length, the frame length is set to a predetermined length. Or a code of a step of dividing the non-voice data so as to be less than or equal to the above, and a code of a step of adding a third header to the non-voice data remaining by the division,
A code for transmitting the multiplexed data having a frame length equal to or less than the predetermined length and multiplexing and transmitting the non-voice data to which the third header is added at the next transmission; The code of the receiving step of the multiplexing device, the multiplexed data from the transmission partner,
A code for separating audio data and non-audio data based on the first and second headers, a code for transmitting the separated audio data to a predetermined audio port, And a code for transmitting the non-voice data to a predetermined non-voice port.

A plurality of communication nodes are mutually connected by a communication line, and at least one data multiplexing device is connected to each of the communication nodes, and the data multiplexing device exchanges data via the communication nodes. Do
Further, in a storage medium for storing a program code of a multiplex communication method in a multiplex communication system having a predetermined line network in the communication node, a code of a communication step in the communication node may be a voice having a first control header added thereto. A code for receiving multiplexed data including system data and non-speech data, and a step of separating the multiplexed data into the speech data and non-speech data with reference to the first control header. A code for adding a second control header matching the circuit network in place of the first control header to the separated voice-based data and non-voice-based data, A code for transmitting voice-based data and non-voice-based data to which the header is added to the circuit network, and the l-th data in place of the second control header. A code for generating multiplexed data including the voice data and the non-voice data by adding a control header, and a code for transmitting the generated multiplexed data to the communication line. It is characterized by.

A plurality of communication nodes are mutually connected by a communication line, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a built-in predetermined network and a router device. A storage medium for storing a program code of a multiplex communication method in a multiplex communication system in which the data multiplexing apparatus exchanges data via the communication node, wherein a code of a communication step in the router apparatus is added with an IP header. The code of the step of receiving voice data, facsimile data, and LAN data from the Ethernet communication line as the line network, and the voice data, facsimile data, and LAN data to which the IP header is added, are referred to by referring to a routing table. A code for transmitting to the communication line; More said received voice data, facsimile data, the LAN data, characterized by comprising a code sending to the Ethernet communication line.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the relative arrangement of the components described in the following embodiments,
It goes without saying that the formulas, numerical values, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

[First Embodiment] FIG. 2 is a block diagram showing a configuration of an entire multiplex communication system according to a first embodiment of the present invention. In the system shown in FIG. 1, the multiplexing device 10 and the multiplex relaying device 20 correspond to each other on a one-to-one basis, and are connected by a 128 kbps SD (digital dedicated line). The digital leased line uses services such as digital access 128 of Nippon Telegraph and Telephone Corporation (NTT). In one Node (node), a plurality of multiplex relay devices 20, one Node management terminal 40,
One inter-node router device 30 is accommodated, and each configures an intra-node LAN by Ethernet.

FIG. 1 shows an example of a frame format according to the present embodiment.
In the case of 3.1 1.6 kbps and TelCh0 to 3 have sound, the maximum length of a LAN / control frame that can be transmitted every 30 msec in a 128 kbps band is shown. The details of the multiplex frame will be described later (see FIG. 10).
reference).

The inter-node router device 30 of FIG. 2 is connected to other nodes by 1.5 Mbps SD (digital dedicated line). Each Node is assigned a Node number, and each multiplex relay device in the Node, Node
A unique Global IP Address is given to each of the inter-router device and the Node management terminal. Node
Is the same Network Address. In addition, the same Global IP Address as the multiplex relay device is given to the multiplex device corresponding to the multiplex relay device on a one-to-one basis. FIG. 2 shows a case where there are two Nodes and two multiplex relay devices in each Node for easy understanding.

FIG. 3 is a block diagram showing the configuration of the multiplexer 10 shown in FIG. The DSP (Digital Signal Pro) shown in FIG.
The processor 110 has circuits for controlling various interfaces for each telephone line, such as a booster, a ringer (ringer) generator, a DTMF decoder, and a hook determiner for generating a voltage necessary for generating a telephone call signal. With
A circuit for AD / DA conversion and compression / decoding of input audio data is included. Also, the DSP 110 has
A circuit for automatically detecting FAX data and performing AD / DA conversion and compression / decoding is also included.

The DSP 110 has four RJ11 analog ports, each having four lines (TelCh).
Corresponds to 0-3. The audio data decoded by the DSP 110 is sent to the corresponding TelCh telephone.

In this embodiment, the audio compression method is G
723.1 6.3 kbps is used. G723.1
At 6.3 kbps, every 30 msec, voice data of 24 bytes is generated for sound and 0 bytes for no sound. For FAX data, refer to 29 96
When 00 bps is used, FAX data of 36 bytes is generated every 30 msec.

The Ethernet controller 120 has three RJ45 Ethernet ports, and the above-mentioned Ethernet terminal has a Private IP Address and a private network (Private Network).
ork). HDLC (High level Data L)
The ink control) controller 140 has a function of assembling and disassembling the HDLC frame. The line interface (Line I / F) 150 is an ISDN (2B
+ D) or SD (128 kbps).

The CPU 30 has a ROM
(Read Only Memory) The program stored in the read only memory 60 is read and executed to control the entire multiplexing apparatus. For this control, voice data received by the DSP 110 or LAN data received by the Ethernet
(Random Access Memory) Stored in a queue (Queue) on 61, create multiplexed frames, and HDL every 30 msec
DMA (Direct Memory Acces
s) issuing a request and DMA
1 receives the multiplexed frame, the multiplexed frame is decomposed, and the voice / fax data is
This includes transmitting LAN data to the Ethernet controller 120.

FIG. 4 is a block diagram showing the configuration of the multiplex repeater 20 of FIG. The multiplex relay device 20 is configured as shown in FIG.
Since the configuration is the same as that of the multiplexing apparatus except for the DSP 110 and the analog port, the description is omitted here.

FIG. 5 shows the router 30 between the nodes in FIG.
FIG. 3 is a block diagram showing the configuration of FIG. The inter-node router device 30 sets the Line I / F of the multiplex relay device of FIG.
S from DN (2B + D) / SD (128kbps)
It has a configuration changed to support D (1.5 Mbps). Therefore, the description of the same components as those of the multiplex relay device is omitted here.

Each device in the Node includes a management information table shown in FIG. 6A and a No. shown in FIG.
It has a routing table between de. Of these tables, the management information table includes a Node number, a multiplexing device Global IP Address, and a multiplexing device Global IP Address.
s, Priva formed by Ethernet terminals connected to the multiplexing device
te IP Network Address and its Network Mask,
Then, the extension telephone number of the telephone connected to the multiplexing device is
Registered in advance. On the other hand, the inter-Node routing table includes a Node number, an inter-node router Glob.
al IP Address and its Network Mask are registered in advance.

For example, in FIG.
Consider a case where a call is made from 01 to extension telephone number 0021. In this case, Global IP Address = 203.14
0.129.1 multiplexing device (calling side) and Global IP Ad
The multiplexing device (calling side) with dress = 203.140.130.1, According to the 931 signaling protocol, as shown in FIG. 7, call control data is exchanged via the node management terminal to perform a calling process. Also, Global IP Addr
Multiplexing repeater (calling side) of ess = 203.140.129.1 and Global IP Address = 203.140.13
Upon receiving the above-mentioned call control data, the multiplex relay device (called side) of 0.1 creates the call connection table shown in FIG.

The call connection table contains the T of the calling side multiplexer.
elCh, Global Calling Multiplexer and Multiplexer
The IP address, TelCh of the called-side multiplexing device, and the Global IP Address of the called-side multiplexing device and the multiplex relay device are registered.

After registering such a call connection table, a connection for an extension call in the communication system is established. Note that when this connection is disconnected, the Q.300 is connected between the multiplexing devices. According to the 931 signaling protocol, as shown in FIG. 8, call control data is exchanged via the node management terminal. When the sequence in FIG. 8 ends, the multiplex relay device clears the call connection table shown in FIG.

Hereinafter, in this multiplexing apparatus, voice data from a telephone, FAX data from a FAX, LAN /
An algorithm for creating a multiplexed frame by multiplexing control data and transmitting the multiplexed frame will be described. (A) of FIG. In the case of 723.16.3 kbps,
The format of a multiplex frame transmitted every 30 msec in a band of 128 kbps is shown. Note that the FLAG and the FCS (Frame Check Sequence) in the figure are added by the HDLC controller.

In a 128 kbps band, 30 ms
Since the maximum length of a frame that can be sent for each ec is 480 bytes, the total length of the above multiplex frame should not exceed 480-d bytes. Here, d (byte) is an adjustment parameter value. FIG. 12 shows an MCH (Multip
lexing Control Header), and the header includes a data type 1201, a voice / FA
TelCh number 1202, LA for X data
In the case of N / control data, this is a unique header including a sequence number 1202 and a data length 1203 when divided. MCH is data type identification, voice / FA
Calling source and destination TelCh in case of X data
And is used for reassembly when divided in the case of LAN / control data.

FIGS. 11A and 11B are flowcharts showing a procedure for transmitting a multiplex frame by the multiplexing apparatus.
In step S110 of FIG. 11A, a DSP voice / FAX data reception interrupt for TelCh0 to TelCh3 occurs within 30 msec. As described above, voice data of 24 bytes is received in the case of sound and 0 bytes in the case of no sound. If there is FAX data, 36-byte FAX data is received. When the phone is in the on-hook state, no voice data is received.

In step S111, the received voice / fax data is written to the voice / fax data queue on the RAM for each TelCh. Then, when a timer interrupt of 30 msec occurs in step S120, TelCh0 to TelCh0 in step S121.
The voice / fax data is read from the voice / fax data queue 3 and the voice / fax data MCH
To create a voice / fax data portion of the multiplex frame shown in FIG. 10A on the RAM. Here, the channel number of the MCH for voice / fax data is
Specify elCh.

In step S130, the divided LA
If there is N / control data, in step S131,
MCH is added as “with division”, and the above voice / FA
An additional copy is made at the end of the X data section. If it is determined in step S140 that the multiplex frame length is longer than 480-d bytes, step S1 of FIG. 11B is performed.
In 70, the multiplex frame length is divided so as to be 480-d bytes, and the remaining data is
/ Write to control data queue. Then, step S
When a timer interrupt of 30 ms occurs after step 120 (step S180), transmission of the multiplex frame is started for SD (128 kbps).

On the other hand, in the above step S140,
If it is determined that the multiplex frame length is shorter than 480-d bytes, in step S150, if there is a LAN data reception interrupt or a control data transmission request from the Ethernet controller, in step S151, M
CH is added as “no division”, and additional copying is performed at the end of the multiplex frame.

If it is determined in step S160 that the multiplex frame length is longer than 480-d bytes, in step S170, the multiplex frame length is determined to be 480-d bytes.
The data is divided into bytes, and the remaining data is written in the divided LAN / control data queue. Thereafter, after a timer interrupt of 30 ms occurs after step S120 (step S180 in FIG. 11B), SD (128
kbps), transmission of the multiplex frame is started.

The multiplex frame is SD (128 kbp)
s) and received by the multiplex repeater. The multiplex relay apparatus receives the multiplex frame 1301 shown in FIG. 13 and decomposes and converts it into an IP frame 1302 shown in FIG. The algorithm at that time is shown in FIGS. 14A and 14B.

In step S210 of FIG. 14A, H
When the DLC controller receives the multiplex frame,
Referring to the MCH, the data type (voice / fax / control /
LAN) is determined. Processing of voice / fax data is shown in steps S211 to S240. Using the channel number of the MCH for voice data, that is, the calling side TelCh as a key, the calling side Glob from the call connection table shown in FIG.
al IP Address, Called Global IP Address, Called Te
1Ch is obtained. An IP header (the format is shown in FIG. 15) in which the channel number of the first byte of the MCH for voice / fax data is set to the called side TelCh.
And the calling-side Global IP Address and the called-side Global IP Address are the source IP Address and the destination IP Address of the IP header, respectively. Then, in step S240, the IP header is added instead of the MCH, and the Ethernet controller
Send to the Ethernet LAN in the Node.

Step S250 to step S in FIG. 14A
Steps S270 to S291 in FIG. 270 and FIG. 14B show processing of LAN / control data. If it is determined in step S250 that the LAN / control data is not divided, the process proceeds to step S251. If the data is divided, the process proceeds to step S260. If it is determined in step S260 that the LAN / control data is the last divided frame, the process proceeds to step S2.
Proceeding to 61, data is assembled according to the sequence number of the MCH. However, if the LAN / control data is not the last divided frame, the flow advances to step S270 to insert the LAN / control data into the reception queue.

After the processing in steps S251 and S261, the process proceeds to step S280, where the destination Private
Using the e IP Address as a key, the calling-side Global IP Address and the called-side Global IP Add from the call connection table shown in FIG.
get ress. In step S290, the first byte of the LAN / control data MCH is used as the TOS field of the IP header, and the calling Global IP Address and the called Global
The IP Address is the source IP Addres of the IP header.
s, destination IP Address. Then, step S291
, Except that the MCH is added and the IP header is added instead, and the Ethernet controller
To the Ethernet LAN inside

Ethernet-I transmitted to the intra-Node LAN
The P frame is transmitted from the router between the nodes in FIG.
IP routing is performed with reference to the inter-Node routing table (b). When sending to another node, the router between the nodes converts the Ethernet frame into an HDLC frame and transmits it as an HDLC-IP frame to the SD (1.5 Mbps) between the nodes. Conversely, the SD between nodes (1.5
Mbps), an HDLC-IP frame is received.
Converts HDLC frames to Ethernet frames,
It is transmitted to the intra-Node LAN as an et-IP frame.

The flowcharts of FIGS. 16A and 16B are as follows.
In the multiplex repeater, the Ethernet shown in FIG.
13 shows an algorithm for receiving an IP frame, assembling it into a multiplex frame shown in FIG.

In step S310 of FIG. 16A, Et
When the Ethernet controller receives the Ethernet-IP frame, the process proceeds to step S311 where the received data type (voice / FAX / control / LAN) is determined based on the TOS field of the IP header of the frame. If the received data is voice / fax, the process proceeds to step S320,
Except for the IP header, the TOS field of the IP header is added as an MCH instead. The voice / fax data for each TelCh is determined by the channel number of the MCH.
Write to Queue.

In step S330, 30 msec
In step S331, the audio data is read from the audio data queue of TelCh0 to TelCh3, and the audio / fax data portion of the multiplex frame shown in FIG. 10A is created in the RAM in step S331.
If there is any divided LAN / control data in step S340, the MCH
Is added as “with division”, and an additional copy is made at the rear of the voice / fax data portion.

If it is determined in step S350 that the multiplex frame length is longer than 480-d bytes,
In step S381, the multiplex frame length is 4
Divide into 80-d bytes and divide the remaining data into
Write to the LAN / control data queue after division. Thereafter, after a timer interrupt of 30 ms occurs after step S330 (step S390), SD (128k
(bps), transmission of the multiplex frame is started (step S391).

On the other hand, if the received data is LAN / control, the flow advances to step S370 to remove the IP header and add the TOS field of the IP header as MCH (no division) instead, and add Make additional copies. If it is determined in step S380 that the multiplex frame length is longer than 480-d bytes, in step S381, the multiplex frame length is divided into 480-d bytes, and the remaining data is divided into To the LAN / control data queue.

Then, after step S330, 30 m
s timer interrupt occurs (step S39).
0), transmission of the multiplex frame is started for SD (128 kbps) (step S391). The multiplex frame is received by the multiplexing device through SD (128 kbps).

FIG. 17 is a flowchart showing an algorithm for receiving the multiplex frame, transmitting voice / fax data to each TelCh, and transmitting LAN data to the Ethernet Private LAN in the multiplexing apparatus.

In step S410 of FIG.
When the controller receives the multiplex frame, MCH
And refer to the data type (voice / fax / control / LA
N) is determined. If the data is voice / fax data, in step S411, the voice data excluding the MCH is transmitted to TelCh corresponding to the channel number of the MCH.

If the received multiplex frame is LAN / control data, the flow proceeds to step S421 if the LAN / control data is not divided, and proceeds to step S430 if it is divided. In step S430,
If the LAN / control data is the last divided frame, the flow advances to step S431 to assemble according to the MCH sequence number. If the LAN / control data is not the last divided frame, the flow advances to step S440 to insert the LAN / control data into the reception queue. In steps S421 and S431, the Ethernet controller transmits LAN data excluding the MCH to the Ethernet Private LAN.

As described above, according to the present embodiment, LAN / control data is divided and multiplexed so that the total length of a multiplex frame does not exceed a predetermined byte.
Even when LAN / control data is being transmitted to SD (128 kbps), the maximum bandwidth of the LAN / control data is ensured, the delay is kept within a certain time, and voice extension calls and F
AX communication can be performed.

Also, as shown in FIG. 1, when the audio compression method is G723.1 1.6 kbps and TelCh0 to 3 voices are present, 30 msec in a 128 kbps band.
The maximum length of the LAN / control frame that can be transmitted every time is shown in FIG.
It can be seen that the frame according to the present embodiment is longer than the conventional examples shown in FIGS. [Second Embodiment] Hereinafter, a second embodiment according to the present invention will be described. FIG. 18 is a block diagram showing a configuration of the entire multiplex communication system according to the embodiment of the present invention.
In the figure, the same components as those of the multiplex communication system according to the first embodiment shown in FIG. 2 are denoted by the same reference numerals. The multiplexing device 10 and the multiplex relaying device 20 according to the present embodiment are connected by an ISDN line in a one-to-one correspondence. Here, the ISDN line includes two B channels (64 kbps) and one D channel (16 kb).
ps), and an INS net 64 is an ISDN provided by NTT, for example, as a BRI (Basic Rate Interface: basic interface).

In one node (Node), a plurality of multiplex relay devices 20, one Node management terminal 40, and one Inter-Node router device 31 are accommodated.
An intra-Node LAN is configured by Ethernet. Node
The inter-router device 31 is connected to the other nodes by 155M each.
It is connected by a bps ATM (Asynchronous Transfer Mode) dedicated line. ATM leased lines are, for example, NTT AT
Use services such as M Megalink.

A Node number is assigned to each Node, and a unique Global IP Address is given to each of the multiplex relay devices 20, the inter-node router devices 31, and the Node management terminals 40 in the Node. Note that N
The inside of the mode is the same Network Address. The multiplexing device 10 corresponding to the multiplexing relay device 20 on a one-to-one basis is given the same Global IP Address as the multiplexing relay device 20. In addition, each multiplexing device and multiplex relay device has an IS
Given the DN telephone number, the multiplexer has the ISDN telephone number of the opposing multiplex repeater. FIG. 18 shows a case where there are two Nodes and two multiplex relay apparatuses in each Node for easy understanding.

The multiplexing apparatus 10 and the multiplex relay apparatus 20 according to the present embodiment have the same configurations as the multiplex apparatus and the multiplex relay apparatus according to the first embodiment shown in FIGS. 3 and 4, respectively.

FIG. 19 is a block diagram showing a configuration of the inter-node router device 31 according to the present embodiment. In the inter-node router device in the first embodiment, H
While the DLC frame is transmitted and received on the digital leased line, in the present embodiment, the ATM cell is transmitted and received on the ATM leased line. Therefore, according to the present embodiment,
The de-router device is an ATM SAR (Segmentation And Reassembly) 1 that disassembles and assembles ATM cells.
41 and an ATM interface 152 for transmitting and receiving ATM cells.

FIG. 20A shows an example of the management information table of each device in the Node, and FIG.
Shows an example of an inter-Node routing table. The management information table includes a Node number, a multiplexer-multiplexer Global IP Address, an ISDN telephone number of the multiplexer, an ISDN telephone number of the multiplexer, and a Private IP Network formed by an Ethernet terminal connected to the multiplexer.
The Address, its Network Mask, and the extension number of the telephone connected to the multiplexing device are registered in advance. In addition, the routing table between the nodes includes N
The node number, the inter-node router Global IP Address, and its Network Mask are registered in advance.

Here, consider a case where a call is made from extension telephone number 0001 to extension telephone number 0021. Global I
Multiplexer (calling side) with P Address = 203.140.129.1 and Global IP Address = 203.140.
130.1 multiplexing apparatus (called side) According to the 931 signaling protocol, for example, as shown in FIG.
Call control data is exchanged via an ISDN exchange provided by NTT or the like and a node management terminal to perform a calling process.

Global IP Address = 203.14
0.129.1 multiplex repeater (calling side) and Global I
When receiving the call control data, the multiplex relay apparatus (called side) with P Address = 203.140.130.1 receives the call control data shown in FIG.
The call connection table shown in FIG. The call connection table includes TelCh of the calling-side multiplexing device, ISDN number of the calling-side multiplex relay device, ISDN number of the calling-side multiplexing device,
TelCh of the called side multiplexer, I of the called side multiplexer
The SDN number and the ISDN number of the called multiplexer are registered.

After the registration of the call connection table, a connection for an extension call in the communication system is established. When this connection is to be disconnected, Q.Q. According to the 931 signaling protocol, as shown in FIG. 8, via the ISDN exchange provided by NTT or the like and the node management terminal,
Exchange call control data. And in this process,
The multiplex relay device clears the call connection table shown in FIG.

Therefore, processing in the multiplexing apparatus according to the present embodiment will be described. Here, the description will be made with reference to the drawings used in the first embodiment, focusing on the differences from the multiplexing apparatus according to the first embodiment.

If there is a LAN data reception interrupt and a connection for an extension call has not been established, the multiplexing apparatus returns to Q.30 shown in FIG. In accordance with the 931 signaling protocol, a call connection is made with the corresponding multiplex repeater. If a connection for an extension call has not been established and there is no continuous interruption of reception of LAN data for a certain period of time or longer, Q.2 shown in FIG. The call is disconnected according to the 931 signaling protocol.

The audio compression system of the multiplexer is G729 (8
kbps). In G729 (8 kbps), voice data of 10 bytes is generated every 10 ms in the case of sound and 0 bytes in the case of no sound every 10 ms. Therefore, FIG.
In step S110 of A, during 10 msec,
The DSP audio data reception interrupt of TelCh0 to TelCh3 will occur. The FAX data is V. 33
When 14400 bps is used, FAX data of 18 bytes is generated every 10 msec. Then, voice data of 10 bytes is received when there is sound, and 0 bytes is received when there is no sound. If there is FAX data, 18 bytes FAX
Receive data. When the telephone is in the on-hook state, no voice data is received.

In step S111, the received voice / fax data is written to the voice / fax data queue on the RAM for each TelCh. When a 10 msec timer interrupt occurs in step S120, the TelCh is set in step S121.
Voice / FAX from Voice / FAX data queue of 0-3
Read the data and save M for voice / fax data
By adding a CH, a voice / fax data portion of the multiplex frame shown in FIG. 10B is created on the RAM. 64k
In a band of bps + 64 kbps = 128 kbps, 1
Since the maximum length of a frame that can be sent every 0 msec is 160 bytes, the multiplex frame has a total length of 160-d
Do not exceed bytes. Note that d (byte) is
This is the adjustment parameter value.

Here, the total length of the multiplex frame is 80-
If d bytes (d is an adjustment parameter value) or less, B
Transmission is performed on only one channel. However, if the total frame length is 80-d bytes or more, transmission is performed at a maximum of 128 kbps by MP (Multilink Protocol) using the B1 and B2 channels simultaneously. Multiple frames are ISD
The signal is received by the multiplex repeater through the N lines.

Next, the processing in the multiplex relay apparatus according to the present embodiment will be described focusing on the points different from the first embodiment.

If there is an Ethernet-IP frame reception interrupt in the Node and a connection for an extension call has not been established, the multiplex repeater sets the Q.30 shown in FIG. In accordance with the 931 signaling protocol, a call connection is made with the corresponding multiplexing device. If a connection for an extension call has not been established and there is no Ethernet-IP frame reception interrupt for a certain period of time or longer, Q.2 shown in FIG. The call is disconnected according to the 931 signaling protocol.

In the algorithm for receiving an Ethernet-IP frame in the Node, assembling and converting it into a multiplex frame (see FIGS. 16A and 16B), each voice / FAX / control / LA is triggered by a 10 ms timer interrupt.
The MCH is added for every N data, the creation of the multiplex frame shown in FIG. 10B is started, and the transmission of the multiplex frame to the ISDN is started upon the next 10 ms timer interrupt.

The maximum length of the multiplex frame is 160-d bytes (d is an adjustment parameter value). Here, if the total length of the multiplex frame is equal to or less than 80-d bytes (d is the number of adjustment parameter bytes), the multiplex frame is transmitted only to the B1 channel. However, if the frame is 80-d bytes or more, the B1 and B2 channels are used simultaneously, and the MP (Mult
Transmission at a maximum of 128 kbps by ilink Protocol). Then, the multiplex frame is received by the multiplexing device through the ISDN line.

Ethernet-I transmitted to LAN in Node
The P frame is an inter-node router device, as shown in FIG.
Referring to the routing table between the nodes of
Be routed. When sending the packet to another node, the router between the nodes removes the Ethernet header from the Ethernet frame, decomposes it into ATM cells, and
The ATM-to-Node ATM (155
Mbps). Conversely, the inter-node router device uses an ATM-to-Node ATM (155 Mbps).
When an IP packet is received, an ATM cell is assembled and Et
A hernet header is added and transmitted as an Ethernet-IP frame to the LAN within the Node.

According to the present embodiment described above, if the total length of the multiplex frame is equal to or smaller than a predetermined byte, transmission is performed only to the B1 channel. By using them simultaneously, the access line to the Node is ISDN (2B + D)
In this case, as in the case of the dedicated line, even when the LAN / control data is being transmitted, the maximum bandwidth of the LAN / control data is secured, the delay is suppressed within a certain time, and the voice extension call and the fax are performed. Communication can be performed smoothly.

[Third Embodiment] Hereinafter, a third embodiment of the present invention will be described.
An embodiment will be described. FIG. 22 is a block diagram showing a configuration of the entire multiplex communication system according to the present embodiment. In the figure, the same components as those of the multiplex communication system according to the first embodiment (see FIG. 2) are denoted by the same reference numerals. In this multiplex communication system, a plurality of multiplex relay devices 20 and one Node
An e-management terminal 40 and one inter-node router device 32 are accommodated, each of which configures an intra-node LAN by Gigabit Ethernet.

The router device 32 includes a plurality of WDMs (Wavel
ength Division Multiplexing (WDM) interface, other nodes and Internet Service Provider (Internet Service Provide)
r) router device and 2.4 Gbps WDM each
Connected by WDM is a technique of allocating a plurality of channels of data to different wavelengths and multiplexing the data on a single optical fiber. The bandwidth can be greatly expanded by using an existing optical fiber. A Node number is assigned to each Node, and each multiplex relay device, router device, N
mode management terminals have unique Global IP Ad
dress is given. In the Node, the same Network
Address. The multiplexing device 10 corresponding to the multiplexing device 20 on a one-to-one basis has the same Global IPA as the multiplexing device 20.
ddress is given.

FIG. 22 shows Nod for easy understanding.
e, two multiplex repeaters in each Node, each No.
The configuration in which the router device in the de is connected to the router device of the other Node and the router device of the Internet Service Provider is shown. The multiplexing device 10 and the multiplex relay device 20 have the same configurations as the multiplex device and the multiplex relay device according to the first embodiment shown in FIGS.

FIG. 23 is a block diagram showing the configuration of the router 32 shown in FIG. The router device 32 according to the present embodiment has a plurality of WDM optical fibers as Line I / Fs, and the maximum transmission speed is 2.4 Gb.
ps. The IP frame received from the Gigabit Ethernet is transmitted directly on the optical fiber configured by WDM. The IP frame received from the optical fiber configured by WDM is transmitted to the Gigabit Ethernet in the node.
Sent to LAN.

Hereinafter, the processing in the multiplexing apparatus according to the present embodiment will be described mainly focusing on differences from the multiplexing apparatus according to the above-described second embodiment.

FIG. 24 is a flowchart showing a procedure for transmitting a multiplex frame by the multiplexing apparatus. In FIG. 11, the same processing steps as those in the multiplex frame transmission procedure according to the first embodiment and the second embodiment shown in FIG. 11A are denoted by the same reference numerals, and are not described here.

In step S150a of FIG. 24, when a reception interrupt by the Ethernet (registered trademark) on the user side occurs, the multiplexing apparatus uses the Network Mask of the destination IP address of the IP header (see FIG. 15) of the received frame as a key. Search for the Private IP Network Mask in the management information table of FIG. As a result of the search, if the Network Mask of the destination IP address matches the Private IP Network Mask of the management information table, the received frame is recognized as LAN data. Conversely, if the Network Mask of the destination IP address does not match the Private IP Network Mask of the management information table, the received frame is
It recognizes that it is AN data.

Here, in order to distinguish between LAN data and WAN data, an MCH shown in FIG. 25 is added (no division). For WAN data, a plurality of source Private IP addresses on the user side are assigned by the IP masquerading function to one Global IP Ad-
Convert to dress. In this IP masquerade, Interne
TCP and U are used to distinguish which host in the Private Network the IP frame from
The starting port number included in the DP header is used.

The audio compression method of the multiplexing device here is G729 (8 kbps) as in the second embodiment.
Is used. And LAN / WAN to which MCH is added
The data is added to the LAN / WAN / control data section of FIG. 26B, and the multiplex frame shown in FIG. 26B is transmitted to the ISDN network every 10 msec.

Conversely, when the HDLC controller receives the above multiplexed frame from the ISDN, it refers to the MCH and refers to the data type (voice / FAX / control / LAN / LAN).
WAN). Here, as for the WAN data, the IP address masquerading function converts one destination Global IP Address of the multiplexing device / multiplexing relay device into a plurality of Private IP Addresses on the user side, and removes the MCH from the WA.
Send N data to Ethernet Private LAN. As a result, a user terminal having a Private IP Address connected to the Internet can be identified, and WAN data can be correctly transmitted to the terminal.

Next, processing in the multiplex relay apparatus according to the present embodiment will be described focusing on differences from the processing according to the second embodiment. FIGS. 27A and 27B are flowcharts showing a procedure for receiving a multiplex frame in the multiplex relay apparatus. Here, the multiplexed frame transmitted from the multiplexing device and received by the HDLC controller through the ISDN network corresponds to the multiplexed frame in step S2
At 10, the MCH is referred to determine the data type (voice / fax / control / LAN / WAN). If it is determined in step S293 (FIG. 27B) that the data type is WAN data, the MCH
The frame excluding
Send to Gigabit Ethernet LAN in the mode.

On the other hand, when the Ethernet controller
When an Ethernet-IP frame is received from the Gigabit Ethernet LAN, step S in the algorithm shown in FIG.
At 362, using the Network Mask of the source IP address of the IP header of the received frame (see FIG. 15) as a key, a Private IP Network Mask of the management information table of FIG. .

Here, the Networ of the source IP address
k Mask and Private IP Network Mask of management information table
If they match, the received frame is recognized as LAN / control data. Conversely, the source IP address Network
If the Mask does not match the Private IP Network Mask in the management information table, the received frame is recognized as WAN data received from the Internet.

In order to distinguish between LAN / control data and WAN data, an MCH shown in FIG. 25 is added (no division). The LAN / WAN data to which the MCH is added is added to the LAN / WAN / control data section of FIG. 26B, and a multiplex frame shown in FIG. 26B is transmitted to the ISDN every 10 msec. You.

[0098] Ethernet-I transmitted to LAN in Node
The P frame is IP-routed by the router 32 (see FIG. 22) with reference to the routing table. Then, based on the destination IP address of the IP header, whether the data is data to be transmitted to the Internet or data to be transmitted to another Node is identified, and the corresponding WDM interface (2.4 Gbp) is used.
s) Send an IP frame on top.

Conversely, when the router device 32 receives an IP frame from the WDM interface (2.4 Gbps), it adds an Ethernet header and transmits it as an Ethernet-IP frame to the Gigabit Ethernet LAN in the Node.

As described above, according to the present embodiment, LAN / control data and WAN data are identified based on the match / mismatch between NetworkMask of the source IP address and Private IP Network Mask of the management information table. By doing so, even when LAN / control data is being transmitted, LAN /
The maximum extension of the control data band is ensured, the delay is kept within a certain time, and the voice extension call and the facsimile communication can be performed, and at the same time, the connection and communication with the Internet can be performed.

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus including one device (For example, a copying machine, a facsimile machine, etc.).

Further, an object of the present invention is to supply a storage medium (or a recording medium) in which program codes of software for realizing the functions of the above-described embodiments are recorded to a system or an apparatus, and to provide the system or the apparatus with the storage medium. It goes without saying that the present invention is also achieved by a computer (or a CPU or an MPU) reading and executing a program code stored in a storage medium. in this case,
The program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the operating system (not shown) running on the computer based on the instructions of the program code. It is needless to say that an OS) or the like performs a part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written in a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that a CPU or the like provided in the function expansion card or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

When the present invention is applied to the above storage medium,
The storage medium has been described earlier (FIGS. 11A and 11B
, Etc.) will be stored.

[0106]

According to the present invention, in a multiplex communication system integrating a data system and a voice system, a user having a narrow band can
By adopting a frame configuration and a communication means for dividing and multiplexing a data system on an access line between the de side and the LAN, without deteriorating the real-time performance of voice data.
Data transmission efficiency can be improved.

According to another invention, when the access line to the Node is, for example, ISDN (2B + D),
As in the case of the dedicated line, even during the transmission of LAN / control data, the maximum bandwidth of the LAN / control data can be secured, the delay can be suppressed within a certain time, and the voice extension call and the fax communication can be performed.

Further, according to another aspect of the present invention, LAN / control data and WAN data are distinguished based on the IP address, so that even when the LAN / control data is being transmitted, the L / L data is transmitted.
The maximum bandwidth of the AN / control data is ensured, the delay is kept within a certain time, the voice extension call and the facsimile communication can be performed, and the connection / communication to the Internet is also possible.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a frame format of the present invention and a conventional example.

FIG. 2 is a block diagram illustrating a configuration of the entire multiplex communication system according to the first embodiment.

FIG. 3 is a block diagram illustrating a configuration of a multiplexing apparatus according to the first embodiment.

FIG. 4 is a block diagram illustrating a configuration of a multiplex relay device according to the first embodiment.

FIG. 5 is a block diagram illustrating a configuration of an inter-node router device according to the first embodiment.

FIG. 6 is a diagram showing a management information table and an inter-Node routing table according to the first embodiment.

FIG. It is a figure showing the sequence of the outgoing call processing by 931 protocol.

FIG. It is a figure showing the sequence of the call disconnection processing by 931 protocol.

FIG. 9 is a diagram showing a call connection table of the multiplex communication system according to the first embodiment.

FIG. 10 is a diagram illustrating a multiplex frame format according to the first embodiment.

FIG. 11A is a flowchart showing a multiplex frame transmission procedure by the multiplexing apparatus according to the first embodiment.

FIG. 11B is a flowchart showing a multiplex frame transmission procedure by the multiplexing apparatus according to the first embodiment.

FIG. 12 is a diagram illustrating an MCH format according to the first embodiment.

FIG. 13 is a diagram illustrating frame conversion by a multiplex relay device.

FIG. 14A is a flowchart showing a procedure of receiving a multiplex frame by the multiplex relay apparatus.

FIG. 14B is a flowchart showing a procedure of receiving a multiplex frame by the multiplex relay device.

FIG. 15 is a diagram showing an IP header format.

FIG. 16A is a flowchart showing a procedure of transmitting a multiplex frame by the multiplex relay device.

FIG. 16B is a flowchart showing a procedure of transmitting a multiplex frame by the multiplex relay device.

FIG. 17 is a flowchart showing a procedure for receiving a multiplex frame by the multiplexing device.

FIG. 18 is a block diagram illustrating a configuration of an entire multiplex communication system according to a second embodiment of the present invention.

FIG. 19 is a block diagram showing a configuration of an inter-node router device according to a second embodiment.

FIG. 20 is a diagram showing a management information table and an inter-Node routing table according to the second embodiment.

FIG. 21 is a diagram illustrating a call connection table of the multiplex communication system according to the second embodiment.

FIG. 22 is a block diagram illustrating a configuration of an entire multiplex communication system according to a third embodiment of the present invention.

FIG. 23 is a block diagram illustrating a configuration of a router device according to a third embodiment.

FIG. 24 is a flowchart showing a multiplex frame transmission procedure in the multiplexing apparatus according to the third embodiment.

FIG. 25 is a diagram illustrating an MCH format according to the third embodiment.

FIG. 26 is a diagram illustrating a multiplex frame format according to the third embodiment.

FIG. 27A is a flowchart showing a procedure for receiving a multiplex frame in the multiplex relay device according to the third embodiment.

FIG. 27B is a flowchart showing a procedure for receiving a multiplex frame in the multiplex relay device according to the third embodiment.

FIG. 28A is a flowchart showing a multiplex frame transmission procedure by the multiplex relay apparatus according to the third embodiment.

FIG. 28B is a flowchart showing a procedure for transmitting a multiplex frame by the multiplex relay apparatus according to the third embodiment.

FIG. 29 is a diagram showing a conventional voice IP packet.

FIG. 30 is a diagram showing a voice IP packet according to Conventional Proposal 1.

FIG. 31 is a diagram showing a voice IP packet according to Conventional Proposal 2.

Claims (16)

[Claims] A plurality of communication nodes are connected to each other by a communication line, and at least one data multiplexing device is connected to each of the communication nodes, and the data multiplexing device transmits data via the communication node. A multiplex communication system for exchanging data, wherein a transmitting side of the data multiplexing device determines whether transmission data is voice data or non-voice data, based on the determination result, Means for adding a first header to the data, and adding a second header to the non-speech-based data; and means for adding the second header to the non-speech-based data;
Means for generating multiplexed data including non-voice data to which a header is added; means for determining whether the frame length of the multiplexed data exceeds a predetermined length; and wherein the frame length exceeds a predetermined length. A means for dividing the non-voice data so that the frame length is equal to or less than a predetermined length; a means for adding a third header to the non-voice data remaining after the division; Means for transmitting the multiplexed data having a length equal to or less than the length, and multiplexing and transmitting the non-voice data to which the third header is added at the next transmission; Means for separating the multiplexed data from the transmission partner into voice data and non-voice data based on the first and second headers; A multiplex communication system comprising: a first transmitting unit that transmits to a predetermined voice port; and a second transmitting unit that transmits the separated non-voice data to a predetermined non-voice port. 2. The voice data includes at least one of voice data and facsimile data.
The non-voice data includes at least predetermined control data, LAN (Local Area Network) data, or W
The multiplex communication system according to claim 1, wherein any one of AN (Wide Area Network) data is included. 3. The multiplexed data is generated by adding a multiplex control header to the voice data, facsimile data, LAN data, WAN data, or control data.
3. The multiplex communication system according to claim 2, wherein the data is data having a DLC (High Level Data Link Control) multiplex frame. 4. The first transmitting means obtains the separated audio data by referring to the multiplex control header.
While transmitting to the destination telephone channel as the voice port, the separated facsimile data is obtained by referring to the multiplex control header, and transmitted to the destination facsimile channel as the voice port, and Transmitting means for transmitting the separated LAN data,
Assembling with reference to the multiplex control header and transmitting the assembled WAN data to the Ethernet (registered trademark) port as the non-voice port, and assembling the separated WAN data with reference to the multiplex control header, the Ethernet
The multiplex communication system according to claim 3, wherein the transmission is performed to a port. 5. The multiplex communication system according to claim 1, wherein a maximum value of said frame length is determined by a band of said communication line. 6. A plurality of communication nodes are connected to each other by a communication line, and each of these communication nodes is connected to at least one data multiplexing device. Exchanges,
Also, a multiplex communication system having a predetermined line network in the communication node, wherein the communication node receives multiplexed data including voice data and non-voice data to which a first control header is added. Means, with reference to the first control header, separating means for separating the multiplexed data into the voice data and non-voice data, and the separated voice data and non-voice data into the voice data and non-voice data. Adding means for adding a second control header matching the network instead of the first control header, and transmitting voice-based data and non-voice-based data to which the second control header is added to the network Means for generating multiplexed data including the audio data and the non-audio data by adding the first control header in place of the second control header; and the generated multiplexing. Conversion Means for transmitting data to the communication line. 7. The voice data includes at least voice data and facsimile data, and the non-voice data includes at least predetermined control data and LAN data.
(Local Area Network) data, WAN (Wide Area Ne)
7. The multiplex communication system according to claim 6, wherein the data includes twork) data. 8. The separating means according to claim 1, wherein said multiplexed data is converted to said voice data, facsimile data, control data, LAN data,
Data and WAN data, and the adding means separates the voice data, facsimile data,
The l-th data added to the control data and the LAN data.
Except for the multiplex control header as a control header of the second control header, instead of referring to the multiplex control header and a call connection table created by receiving the control data, The multiplex communication system according to claim 7, wherein a header is added. 9. The method according to claim 1, wherein the generating unit excludes the IP header of the voice data, facsimile data, control data, and LAN data, and replaces the TOS (Type) of the IP header.
The multiplexed communication system according to claim 8, wherein the multiplexed data is generated by adding the multiplex control header with reference to an (OfService) field and adding the multiplex control header to the WAN data. . 10. A plurality of communication nodes are mutually connected by a communication line, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a predetermined line network and a router device built therein. A multiplex communication system in which the data multiplexing device exchanges data via the communication node, wherein the router device transmits voice data, facsimile data, and LAN data added with an IP header to the line network. Means for receiving from an Ethernet communication line as a means, means for transmitting voice data, facsimile data, and LAN data to which the IP header is added to the communication line with reference to a routing table, and receiving from the communication line Means for transmitting the voice data, facsimile data, and LAN data to the Ethernet communication line Multiplex communication system comprising: a. 11. A plurality of communication nodes are connected to each other by a communication line, and each of these communication nodes is connected to at least one data multiplexing device, and said data multiplexing device transmits data via said communication node. A multiplex communication method in a multiplex communication system that performs exchange, wherein the transmitting step in the data multiplexing device includes a step of determining whether transmission data is voice data or non-voice data, and based on the determination result. Adding a first header to the audio data and adding a second header to the non-audio data; and adding the first header to the audio data and the second header.
Generating multiplexed data including non-voice data to which a header is added; determining whether a frame length of the multiplexed data exceeds a predetermined length; and wherein the frame length exceeds a predetermined length. In the case, the step of dividing the non-voice data so that the frame length is equal to or less than a predetermined length; the step of adding a third header to the non-voice data remaining after the division; Transmitting the multiplexed data having a length equal to or less than the length, and multiplexing and transmitting the non-voice data to which the third header is added at the next transmission; and Separating the multiplexed data from the transmission partner into voice-based data and non-voice-based data based on the first and second headers; A multiplex communication method comprising: transmitting separated voice-based data to a predetermined voice port; and transmitting the separated non-voice-based data to a predetermined non-voice port. 12. A plurality of communication nodes are connected to each other by a communication line, and each of these communication nodes is connected to at least one data multiplexing device. Exchanges,
Also, in the multiplex communication method in a multiplex communication system having a predetermined line network in the communication node, the communication step in the communication node may include: voice data and non-voice data to which a first control header is added. Receiving the multiplexed data including the first control header and separating the multiplexed data into the voice data and the non-voice data with reference to the first control header. Adding a second control header matching the circuit network to the voice data instead of the first control header; and converting the voice data and the non-voice data to which the second control header has been added. Transmitting to the line network; and adding the first control header in place of the second control header, and multiplexing data including the voice data and the non-voice data. Steps and, multiplex communication method characterized by comprising the steps of: transmitting the multiplexed data to which the generated to the communication line to be generated. 13. A plurality of communication nodes are mutually connected by a communication line, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a predetermined line network and a router device built therein. And a multiplex communication method in a multiplex communication system in which the data multiplex device exchanges data via the communication node, wherein the communication step in the router device includes: voice data, facsimile data, Receiving LAN data from an Ethernet communication line as the line network; transmitting voice data, facsimile data, and LAN data to which the IP header is added to the communication line with reference to a routing table; The voice data, facsimile data, and LAN received from the communication line Multiplex communication method, characterized in that it comprises a chromatography data, and transmitting the Ethernet communication line. 14. A plurality of communication nodes are connected to each other by a communication line, and each of these communication nodes is connected to at least one data multiplexing device, and said data multiplexing device transmits data via said communication node. In a storage medium storing a program code of a multiplex communication method in a multiplex communication system for exchanging, a step of determining whether a code of a transmission step in the data multiplexing apparatus is transmission data is voice data or non-voice data. And a code for adding an l-th header to the audio data and adding a second header to the non-audio data based on the result of the determination. Voice data and the second
A code for generating multiplexed data including non-voice data to which a header is added; a code for determining whether a frame length of the multiplexed data exceeds a predetermined length; and If the frame length exceeds a predetermined length, a code for dividing the non-voice data so that the frame length becomes the predetermined length or less; and a step for adding a third header to the non-voice data remaining after the division. And a code for transmitting the multiplexed data having a frame length of the predetermined length or less, and multiplexing and transmitting the non-voice data to which the third header is added at the next transmission. The code of the receiving step of the data multiplexing device converts the multiplexed data from the transmission partner into an audio system based on the first and second headers. A code for the step of separating data and non-voice data, a code for transmitting the separated voice data to a predetermined voice port, and the non-voice data after separation to a predetermined non-voice port. And a code for transmitting. 15. A plurality of communication nodes are connected to each other by a communication line, and each of these communication nodes is connected to at least one data multiplexing device. Exchanges,
Further, in a storage medium for storing a program code of a multiplex communication method in a multiplex communication system having a predetermined line network in the communication node, a code of a communication step in the communication node may be a voice to which a first control header is added. A code for receiving multiplexed data including system data and non-speech data, and a step of separating the multiplexed data into the speech data and non-speech data with reference to the first control header. A code for adding a second control header matching the circuit network to the separated voice data and non-voice data in place of the first control header, and the second control A code for transmitting voice-based data and non-voice-based data to which the header is added to the circuit network; and the second control header in place of the second control header. A code for generating multiplexed data including the voice data and the non-voice data by adding a control header to the communication line; and a code for transmitting the generated multiplexed data to the communication line. A storage medium characterized by the above-mentioned. 16. A plurality of communication nodes are mutually connected by a communication line, each of these communication nodes is connected to at least one data multiplexing device, and each of the communication nodes has a predetermined circuit network and a router device built therein. And a storage medium for storing a program code of a multiplex communication method in a multiplex communication system in which the data multiplexing apparatus exchanges data via the communication node, wherein a code of a communication step in the router apparatus has an IP header added. The code of the step of receiving the received voice data, facsimile data, and LAN data from the Ethernet communication line as the circuit network, and the routing table for the voice data, facsimile data, and LAN data to which the IP header is added are referred to. And transmitting the data to the communication line. The audio data received from the line, the facsimile data, the storage medium the LAN data, characterized by comprising a code sending to the Ethernet communication line.