JP2003324476A - Ip packet transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IP packet transmission system in which data which are not made into IP packet are transmitted between CPUs of a terminal and an IP converter without delay and no influence is exerted upon system control, either. <P>SOLUTION: The IP packet transmission system is provided with a terminal 11 which is connected to a data channel for serial data transmission wherein a transmission rate is high in comparison with a control channel and audio or video is continuously produced and to a control channel for system control signal transmission and transmits-receives serial data, and an IP converter 12 which communicates with the terminal 11 by a data channel and a control channel and exchanges an IP packet with the outside, and the data which are not made into IP packet are exchanged between the CPUs of the terminal 11 and the IP converter 12 by using the data channels. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits pre-IP-packetized data transmitted and received between a CPU of a terminal and an IP converter using a data channel for serial data transmission of continuously generated audio and video. IP packet transmission system.

[0002]

2. Description of the Related Art Conventionally, communication between CPUs is performed only by system control, and the control data has been transmitted through a control channel of a bus line route having a low transmission rate.

However, in order to carry out IP-related communication by the control channel of the bus line route, the amount of transmission is insufficient because the amount of control data is larger than the amount of control data.
Slow communication of relations and great influence on system control.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a conventional problem, and it is a terminal and an I.
The present invention provides an IP packet transmission system which transmits data before IP packetization performed between a CPU and a P converter without delay and has no influence on system control.

[0005]

The IP packet transmission system of the present invention has a higher data rate than a control channel and a data channel for serial data transmission and a system control signal transmission for continuously generating voice, video, and the like. , Which is connected to the control channel for transmitting and receiving serial data, and an IP converter which communicates with the terminal through the data channel and the control channel and transmits and receives to and from the outside through IP packets. Then, the data before IP packetization is transmitted and received between the CPUs of the terminal and the IP converter.

With this configuration, the pre-IP packetized data can be transmitted without affecting the system control and without delay.

Further, the pre-IP packetized data transmitted / received between the CPUs is also transmitted / received by partially using the control channel.

With this configuration, the pre-IP packetized data can be efficiently transmitted and received, and particularly, in the case of the file transfer protocol (FTP), there is a large amount of data in the downward direction and a small amount of data in the upward direction, and Direction I
It is also possible to use the control channel for the pre-P-packetized data and not use the upstream data channel.

Furthermore, when a part of the control channel is also used, the pre-IP packetized data is directly transmitted / received by the control channel between the terminal and the IP converter.

With this configuration, the pre-IP packetized data can be transmitted and received more efficiently, the control channel processing load on the control device can be reduced, and the connection disconnection control time can be shortened.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an IP according to the first embodiment of the present invention.
The whole packet transmission system explanatory drawing is shown.

As shown in FIG. 1, the IP packet transmission system according to the first embodiment of the present invention uses a serial line 11d for voice or video and a terminal 11 which transmits / receives pre-IP packetized data by a CPU. , An IP converter 12 that performs conversion into IP packets and transmits / receives serial data by TCP / IP, and a control device 13 that controls the entire system.
The CP / IP enables mutual transmission of serial data with the external Internet or LAN.

The terminal 11 is provided with an input / output unit 11T, and the input / output unit 11T has a CPU 11a and a hardware circuit 11.
b is provided, and the CPU 11a and the hardware circuit 11b are connected by the entire control signal bus line 11c and the audio or video serial line 11d, and the CPU 11a can communicate with the control channel and the data channel. Has become. Similarly, the IP converter 12 is provided with an input / output unit 12T and has the same configuration as the input / output unit 11T.
Although the controller 13 is provided with the input / output unit 13T, the serial line 11d need not be connected.

Serial data is transmitted from the terminal 11 to the IP, for example.
When transmitted to the converter 12, the serial data 31 on the transmission side of the terminal 11 is divided into fixed lengths, and the serial data 35 is transmitted to the reception side of the IP converter 12 via the transmission line 25. As shown in the time division multiplex format 32, the serial data 31 is divided by the hardware circuit 11b into a fixed length for each period of a plurality of predetermined time division multiplex formats 32. On the other hand, the system control signal is sporadically transmitted as the control signal 32c at the position of the time division multiplexing format 32 which is the same as or different from the serial data 32a. The network synchronization signal 32b is transmitted from the control device 13 to the entire system for each time division multiplexing format 32 synchronization.

FIG. 2 shows the IP of the first embodiment of the present invention.
7 shows a data channel connection procedure when transmitting serial data in a packet transmission system.

As shown in FIG. 2, in the IP packet transmission system according to the first embodiment of the present invention, when the serial data is transmitted from the terminal 11 to the IP converter 12, the data channel is connected first. When the packet control request (acquisition) 41 is notified from the CPU 11a of the terminal 11 to the control device 13 via the hardware circuit 11b, the control device 13 gives a packet control instruction 42 to the CPU 11a via the hardware circuit 11b of the terminal 11, and the CPU 11a Thus, the transmission side packet setting 43 is performed in the hardware circuit 11b, the serial IF 31e performs transmission setting of the serial data 31, and the invalid data is transmitted first.

From the CPU 11a of the terminal 11 to the hardware circuit 1
When the use permission confirmation 44 is notified to the control device 13 via 1b, the control device 13 causes the hardware circuit 1 of the IP converter 12 to be transmitted.
The packet control instruction 45 is given to the CPU 12a via 2b, the receiving side packet setting 46 is made in the hardware circuit 12b by the CPU 12a, and the receiving setting is made in the serial IF 12e.

When the CPU 12a of the IP converter 12 informs the controller 13 of the connection request confirmation 47 via the hardware circuit 12b, the controller 13 sends the hardware circuit 1 of the terminal 11 to the connection request confirmation 47.
The packet control completion 48 is given to the CPU 11a via 1b, the connection procedure surrounded by the dotted line is completed, and the serial IF
In 11e, the CPU 11a notifies the transmission start 49 to transmit the actual data of the serial data 31 to the IP converter 12 via the transmission path 25 (see FIG. 1).

FIG. 3 shows an IP according to the first embodiment of the present invention.
An operation procedure for transmitting pre-IP packetized data between CPUs by a data channel in a packet transmission system will be described.

In the IP packet transmission system of the first embodiment of the present invention, when the pre-IP packetization data between CPUs are mutually transmitted and received between the terminal 11 and the IP converter 12, the terminal 11 and the IP converter 12 The pre-IP packetized data transmitted / received between the CPUs is transmitted / received using the data channel. The thick arrow in FIG. 3 indicates that the data before IP packetization is transmitted on the data channel.

As shown in FIG. 3, first, a data acquisition trigger 50 is generated in the terminal 11, and a packet control request (IP packetized data between CPUs is transmitted using a data channel through which serial data 31 is transmitted ( Acquisition) 41
2 is transmitted from the terminal 11 to the control device 13, the data channel connection procedure shown in FIG. 2 is performed, and when the control device 13 transmits the packet control instruction 45 to the IP converter 12, the IP converter 12 receives the packet control instruction 45. When the packet setting 46 is performed and the packet control completion 48 is transmitted from the control device 13 to the terminal 11, the IP packetized data is transmitted from the terminal 11 to the IP converter 12. The IP converter 12
Therefore, the terminals 11 to 11 are always connected by broadcast on another data channel.

The transmission of the pre-IP packetized data between the CPUs is performed by the socket transmission request 57 including the acquisition request information when the trigger is generated and the command reception confirmation 58, which is acquired from the server 14 by the socket transmission request 57. The data is received by the socket reception notification 59-1. At that time, the command reception confirmation 61-1 is performed. If the file size is large, multiple socket reception notifications 5
It is received while being divided into 9-1 to 59-n. Along with this, command reception confirmations 61-1 to 61-n are performed. When all the socket reception notifications 59-1 to 59-n and the command reception confirmations 61-1 to 61-n are completed, the socket disconnection request 64 and the command reception confirmation 65 are performed,
Communication of the socket disconnection request is performed between the IP converter 12 and the server 14 by TCP / IP, while the data channel opening procedure is started.

When a packet control request (release) 66 is transmitted from the terminal 11 to the control device 13, a packet control instruction 67a is transmitted from the control device 13 to the IP converter 12 and the IP converter 12 is released.
Receiving side packet release 68 is performed in the converter 12, and
A packet control instruction 67b is transmitted from the control device 13 to the terminal 11, and the terminal 11 releases the transmission side packet 69.

As described above, in the IP packet transmission system according to the first embodiment of the present invention, when the pre-IP packetization data between CPUs are mutually transmitted between the terminal 11 and the IP converter 12, the system control is affected. The data before IP packetization can be transmitted without delay.

FIG. 4 shows an IP according to the second embodiment of the present invention.
An operation procedure in which a control channel is partially used when transmitting pre-IP packetization data between CPUs using a data channel in a packet transmission system will be described.

In the IP packet transmission system of the second embodiment of the present invention, when pre-IP packetized data between CPUs are mutually transmitted between the terminal 11 and the IP converter 12,
I transmitted / received between the CPUs of the terminal 11 and the IP converter 12
The data before P packetization is transmitted and received using a data channel, but a control channel is also partially used. The thick arrows in FIG. 4 indicate transmission of data before IP packetization on the data channel, and the thin arrows indicate transmission on the control channel.

As shown in FIG. 4, when the same operation as in the IP packet transmission system of the first embodiment is performed from the packet control request (acquisition) 41 to the socket reception notification 59-1, a command from the terminal 11 is sent. The reception confirmation 72-1 uses the control channel and the IP converter 1 via the control device 13.
2 is transmitted. When the file size of the data acquired from the server 14 is large, a plurality of socket reception notifications 59-1 to 59-n are provided as in the first embodiment of the present invention.
The reception is performed while being divided into, and a plurality of command reception confirmations 72-1 to 72-n are performed accordingly.

All socket reception notifications 59-1 to 59-
n and the command reception confirmation 72-1 to 72-n are completed, the socket disconnection request 73 from the terminal 11 is also transmitted to the IP converter 12 via the control device 13 using the control channel.

After that, from the command reception confirmation 65 to the reception side packet release 68, the same operation as the IP packet transmission system of the first embodiment is performed.

As described above, in the IP packet transmission system according to the second embodiment of the present invention, when the pre-IP packetization data between CPUs are mutually transmitted between the terminal 11 and the IP converter 12, the data channel and the control channel are also changed. Part of the data can be transmitted / received to efficiently transmit / receive the pre-IP packetized data. Especially, in the case of the file transfer protocol (FTP), there is a large amount of downlink data and a small amount of upstream data. It is also possible to use the control channel for upstream pre-IP packetized data and not use the upstream data channel.

FIG. 5 shows an IP according to the third embodiment of the present invention.
When transmitting pre-IP packetized data between CPUs using a data channel in a packet transmission system,
An operation procedure in which a control channel is partially used and a control channel between the terminal and the IP converter is used directly is shown.

In the IP packet transmission system according to the third embodiment of the present invention, when pre-IP packetized data between CPUs are mutually transmitted between the terminal 11 and the IP converter 12,
I transmitted / received between the CPUs of the terminal 11 and the IP converter 12
The data before P packetization is transmitted / received using a data channel, but a control channel is also partially used and is directly transmitted / received by a control channel between the terminal 11 and the IP converter 12. A thick arrow in FIG. 5 indicates transmission of data before IP packetization on the data channel, and a thin arrow indicates transmission on the control channel.

As shown in FIG. 5, when the same operation as in the IP packet transmission system of the first embodiment is performed from the packet control request (acquisition) 41 to the socket reception notification 59-1, a command from the terminal 11 is sent. The reception confirmation 82-1 is transmitted to the IP converter 12 without using the control device 13 by using the control channel. When the file size of the data acquired from the server 14 is large, a plurality of socket reception notifications 59-1 to 59-, as in the first embodiment of the present invention.
Reception is performed while being divided into n, and accordingly, a plurality of command reception confirmations 82-1 to 82-n are performed.

All socket reception notifications 59-1 to 59-
When n and the command reception confirmation 82-1 to 82-n are completed, the socket disconnection request 83 from the terminal 11 is also transmitted to the IP converter 12 via the control device 13 using the control channel.

Thereafter, from the command reception confirmation 65 to the reception side packet release 68, the same operation as in the IP packet transmission system of the first embodiment is performed.

As described above, in the IP packet transmission system of the third embodiment of the present invention, when the pre-IP packetization data between CPUs are mutually transmitted between the terminal 11 and the IP converter 12, the data channel and the control channel are also It is possible to transmit / receive a part of the data and to transmit / receive the pre-IP packetized data more efficiently, reduce the control channel processing load of the control device, and shorten the connection disconnection control time.

[0038]

According to the IP packet transmission system of the present invention,
Data before IP packetization performed between the CPU of the terminal and the IP converter can be transmitted without affecting the system control and without delay.

[Brief description of drawings]

FIG. 1 is an overall explanatory diagram of an IP packet transmission system according to a first embodiment of this invention.

FIG. 2 is a diagram showing a data channel connection procedure when transmitting serial data in the IP packet transmission system according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an operation procedure when transmitting pre-IP packetization data between CPUs by a data channel in the IP packet transmission system according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an operation procedure using a partial control channel when transmitting pre-IP packetized data between CPUs using a data channel in the IP packet transmission system according to the second embodiment of the present invention.

FIG. 5 is a block diagram showing a third embodiment of the IP packet transmission system according to the present invention, in which pre-IP packetized data is transmitted between CPUs using a data channel, a control channel is also partially used and a terminal and an IP converter. Diagram showing the operation procedure performed directly by the control channel between

[Explanation of symbols]

11 terminals 11T input / output section 11a CPU 11b hardware circuit 11c Control signal bus 11d transmission line 11e Serial IF 12 IP converter 12T input / output section 12a CPU 12b hardware circuit 12e Serial IF 13 Control device 13T input / output section 14 servers 25 transmission lines

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Joe Amano             3-1, Tsunashima-Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa             Matsushita Communication Industry Co., Ltd. F-term (reference) 5K030 HA08 HB01 HB02 HB21 JA05                       KA11

Claims (3)

[Claims] 1. A terminal for transmitting and receiving serial data by connecting to a data channel for serial data transmission, which has a higher transmission rate than that of a control channel, and which continuously generates audio and video, and a control channel for system control signal transmission. When,
An IP that communicates with the terminal through the data channel and the control channel and transmits / receives to / from the outside through an IP packet
An IP packet transmission system, comprising: a converter, and transmitting and receiving pre-IP packetization data between the CPUs of the terminal and the IP converter using the data channel. 2. The IP packet transmission system according to claim 1, wherein the pre-IP-packetized data transmitted / received between the CPUs is transmitted / received by partially using the control channel. 3. When the control channel is also partially used,
The IP packet transmission system according to claim 2, wherein the pre-IP-packetized data is directly transmitted / received by a control channel between the terminal and the IP converter.