JP3311637B2 - ATM communication device and ATM communication method of the device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for accommodating a connectionless network by using a signaling procedure capable of performing a dynamic call setup in an ATM (Asynchronous Transfer Mode) communication method, and an overall data communication by a call setup delay. The present invention relates to an ATM communication device capable of reducing the delay of an ATM and an ATM communication method of the device.

[0002]

BACKGROUND ART FIG. 4, for example, JP-A-6-205038
FIG. 1 is a configuration diagram showing a protocol configuration in a conventional ATM communication device disclosed in Japanese Unexamined Patent Application Publication No. 2000-209, in which reference numeral 200 denotes a terminal protocol application that outputs quality parameters 210 and 211 to a network layer protocol 204 together with a partner service address, and 201 denotes an error /
UDP 202 for transferring data without flow control, TCP 202 for transferring data via error / flow control,
03 is a stream type transport protocol (hereinafter, referred to as a stream) in which fluctuation of packet delay is absorbed, 204 is a connectionless transmission according to the delay and a quality parameter 211 such as the stream 203,
A network layer protocol (hereinafter, referred to as IP) 205 for setting up a connection and selecting whether or not to transmit is designated by a reference numeral 205.
An ATM driver 207 transfers packets by using a 207, an ATM network 206, and PVCs 208 and 209 which transfer packets from the ATM driver 205 according to a partner address and a band parameter when connection setting and a band request are required.

Next, the operation will be described. First, the terminal protocol application 200 checks the quality parameter 2
10 and 211 together with the partner service address
4 is output. Next, in the IP 204, a mapping function for selecting a connectionless mode for a burst having a severe delay condition, selecting a connection setting mode for a burst having a large throughput, and a mapping function for selecting a connection setting mode with bandwidth reservation for a stream type. Holding
The mapping result is output to the ATM driver 205. Next, the ATM driver 205 transfers the packet to the ATM network 206 using the dedicated PVC 207 in the connectionless mode. On the other hand, if the connection setting and the bandwidth request are required, the PVC 20
8 and 209 are set by the ATM driver 205 and then transferred to the packet.

[0004]

Since the conventional ATM communication apparatus is configured as described above, when connectionless data is output to the ATM network 205, the connection using the PVC 207 which does not use the ATM signaling is used. However, there is a problem that a destination and a QoS (service quality) cannot be freely selected, and unnecessary resources due to the setting of the PVC 207 must be used as the number of terminals increases, and the setting becomes complicated.

Further, the method of transferring connectionless data to a connectionless server has problems such as load concentration on the server and complicated arrangement of the server due to a network configuration.

Further, when connectionless data is transmitted without using a connectionless server, there is a problem that a call setting delay which does not occur in connectionless data occurs because the data is transmitted after a call is set.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a method and a call setup for accommodating a connectionless network by using a signaling procedure capable of performing a dynamic call setup by an ATM communication method. It is an object of the present invention to provide an ATM communication device and an ATM communication method of the device, which can reduce the delay of the entire data communication due to the delay.

[0008]

Signaling control section of the ATM communication apparatus according to the invention SUMMARY OF THE INVENTION The first aspect, as criterion for determining whether or not it is possible to add application data to the signaling message, the service quality of the application data A parameter identification means for performing an ATM signaling procedure without adding application data to the signaling message if the service quality parameter indicates that the call setup delay request is easily accepted; When it indicates that it is unacceptable, application data is added to the signaling message to execute the ATM signaling procedure.

According to a second aspect of the present invention, there is provided an ATM communication method for an ATM communication apparatus, wherein a service quality parameter identification means for application data is provided as a criterion for determining whether application data can be added to a signaling message. If the service quality parameter indicates that the call setup delay request is easily accepted, the ATM signaling procedure is performed without adding the application data to the signaling message, and the service quality parameter indicates that the call setup delay request is not acceptable. In this case, the application data is added to the signaling message to execute the ATM signaling procedure.

According to a third aspect of the present invention, the signaling control unit of the ATM communication apparatus includes a threshold based on a data length of the application data, a threshold value based on a data length of the application data, as a criterion for determining whether the application data can be added to the signaling message. And a service quality parameter identifying means for application data, wherein if the data length is equal to or greater than the threshold value, the ATM signaling procedure is executed without adding the application data to the signaling message. The following, while the protocol type is connection-type application data,
If the service quality parameter indicates that the call setup delay request can be easily accepted, the ATM signaling procedure is performed without adding the application data to the signaling message. When the quality parameter indicates that the call setup delay request is unacceptable, the ATM signaling procedure is executed by adding application data to the signaling message.

According to a fourth aspect of the present invention, the ATM communication apparatus includes a threshold based on the data length of the application data, a protocol type identification of the application data, as criteria for determining whether the application data can be added to the signaling message. Means and means for identifying the quality of service parameter of the application data, respectively, and select whether to add the application data to the signaling message and execute the ATM signaling procedure or to execute the ATM signaling procedure without adding the application data to the signaling message. It is something to do.

According to a fifth aspect of the present invention, there is provided an ATM communication method for an ATM communication apparatus, wherein a threshold value based on a data length of application data, an application data And a service quality parameter identifying means for application data, wherein if the data length is equal to or greater than the threshold value, the ATM signaling procedure is executed without adding the application data to the signaling message. If the protocol type is connection-type application data and the service quality parameter indicates that it is easy to accept a call setup delay request, If the ATM signaling procedure is executed without adding, the application data is included in the signaling message when the protocol type is connectionless type application data and when the service quality parameter indicates that it is difficult to accept the call setup delay request. In addition, an ATM signaling procedure is executed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a protocol concept of an ATM communication apparatus according to Embodiment 1 of the present invention.
Reference numeral 0 denotes an application positioned higher than ATM signaling including TCP / IP, and transmits application data 110 to be transmitted to a partner terminal. A 101 executes the ATM signaling procedure of the ATM communication apparatus and generates a call setup request (SETUP) message 113.
The TM signaling control unit 102 is a signaling determination unit that determines whether the application data 110 can be added to the signaling message.
For example, connection-type application data 111 that is native ATM data depending on the protocol type
Or connectionless application data 112
If the connection-type application data 111 is determined, the application data 110 is transferred after starting the normal signaling procedure. On the other hand, when the application data 112 is connectionless type application data, an identifier indicating the start of the application data is added to the signaling message and the application data 110 is transferred. 103 is an ATM network.

[0014] Next, the operation will be described. FIG. 2 is a flowchart showing an operation procedure of the signaling determination unit of the ATM communication device according to the first embodiment of the present invention. First,
The ATM signaling control unit 101 outputs the received data length of the application 100 to the signaling determination unit 102, and the input signaling determination unit 102 determines whether or not the application data 110 can be added to the signaling message. It is determined whether or not the data length is equal to or greater than a predetermined threshold (step ST1).

[0015] Note that this threshold value, the data length of the ATM network 103 is acceptable, and CPCS-SDU in the ATM adaptation layer e.g., ATM terminal or AT
It is determined based on the amount of buffer that the M switch can hold at one time. If the result of this determination is that the data length is greater than or equal to a predetermined threshold, the application data 110 cannot be added to the signaling message, so that the application data 110 is transferred after starting the normal signaling procedure (step ST4). ).

[0016] When it is determined at step ST1, when the data length is less prearranged threshold value, it is possible to add application data 110 to the signaling message, the application data 11
A protocol type of 0 is determined (step ST2). As a result of the determination of the protocol type, if there is no identifier indicating the connectionless application data 112 (for example, UDP / IP) in the application data 110, the connection type application data which is native ATM data 111
Therefore, the Q of the application data 110 is
oS is determined, and it is determined whether the delay in call setting is strict (step ST3). The connection-type application data 111 is usually subjected to data transfer after executing a normal signaling procedure. However, since there is a demand to obtain a higher speed by a throughput as a whole communication, a request for a call setting delay is required. It is determined whether it is severe.

[0017] When it is determined at step ST2, the order when the identifier in the application data 110 indicating the connectionless data (e.g. UDP / IP) is present, an application data 112 of the connectionless application data After starting the attached signaling procedure, the application data 110 is transferred (step ST5). Next, as a result of the determination in step ST3, if the call setting delay request is loose, that is, if high speed is not required as a whole communication, the application data 110 is transferred after starting the normal signaling procedure (step ST3). ST4). On the other hand, as a result of the determination in step ST3, if the call setting delay requirement is strict, that is, if high speed is required for the entire communication, the application data 110 is transferred after activating the signaling procedure with application data. (Step ST5).

Although this embodiment has shown all three criteria (steps ST1, 2, and 3), depending on the form of the ATM terminal, one or more of these criteria may be used. A determination may be made based on the combination to determine whether to transfer the application data 110 after starting the normal signaling procedure (step ST4) or to transfer the application data 110 after starting the signaling procedure with application data (step ST5). .

Next, a call setting request in ATM signaling control unit 102 (SETUP) how messages will be described. FIG. 3 shows A according to the first embodiment of the present invention.
FIG. 3 is a configuration diagram illustrating a concept of a method of creating a call setup request message in an ATM signaling control unit of a TM communication device. In the figure, 1 is a transmitting ATM terminal, 2 is a receiving ATM terminal, 1
Reference numerals 0 and 11 denote ATM switches, and reference numeral 20 denotes a call setup request (SETUP) signaling message created by the ATM signaling control unit 101, which is obtained by adding an identifier indicating that application data exists and application data to a normal message format. It is. 21 is a call setup response message.

[0020] Next, the operation will be described. First, ATM
The signaling control unit 101 includes the signaling determination unit 10
A call setup request signaling message 20 is created based on the criteria determined in step 2 . Application data 1
If 10 is not added, for example, ATM Forum
Signaling Specification V
A call setup request signaling message 20 is transmitted based on a normal message format such as version 4.0. Further, the application data 110 to be transmitted is temporarily held and transmitted after the completion of the call setup. When the application data 110 is added to the normal message format, for example, an identifier indicating that the application data is present and the application data are added to the normal message format as described above, and the call setup request signaling message 20 is added. Send

Next, the receiving ATM terminal 2 which has received the call setup request signaling message 20 with the application data via the ATM switch 10, 11, for example, the ICMP is a protocol for checking the status of the host terminal In the case of short data such as ping and a response message, a call setup response (CO
(NECT) message 21 to which the application data 110 for response can be added and transmitted to the transmitting ATM terminal 1.

[0022] The application data 110, in the above, was added to both the call setting response is a response a call setup request signaling message 20 (CONNECT) message 21, only the call setup request signaling message 20, or call setup response (CONNECT
T) There are various variations depending on the application form such as only the message 21, and the present invention can be applied to a call disconnection message other than the call setup request signaling message 20.

As described above, according to the first embodiment, the above procedure can reduce the number of various data including signaling messages transmitted and received between the transmitting ATM terminal 1 and the receiving ATM terminal 2. In particular, in the call setting procedure, the first application data 110 can be transferred without waiting for the call setting to be established, so that an effect such as an improvement in throughput as a whole communication can be obtained.

[0024]

As described above, according to the first aspect of the present invention, a service quality parameter identification means for application data is provided as a criterion for determining whether application data can be added to a signaling message. If the quality of service parameter indicates that the call setup delay request is acceptable, the ATM is added to the signaling message without adding application data.
When the signaling procedure is performed and the service quality parameter indicates that the call setup delay request is unacceptable, application data is added to the signaling message to execute the ATM signaling procedure, so that the signaling message is included. There is an effect that the number of various data can be reduced and the throughput of the entire communication can be improved.

According to the second aspect of the invention, as criterion for determining whether or not it is possible to add application data to the signaling message, provided the quality of service parameters identifying means of the application data, quality of service parameters call setup delay Perform an ATM signaling procedure without adding application data to the signaling message if the request indicates that it is easy to accept the request, and if the service quality parameter indicates that the call setup delay request is unacceptable, the signaling message Is configured to execute the ATM signaling procedure by adding application data to the data, so that the number of various data including the signaling message can be reduced, and the throughput of the entire communication can be improved. That.

According to the third aspect of the present invention, as criterion for determining whether or not it is possible to add application data to the signaling message, a threshold based on the data length of the application data, the application data protocol type identifying means, and A service quality parameter identification means for application data is provided, and when the data length is equal to or greater than the threshold, the ATM signaling procedure is executed without adding the application data to the signaling message. If it is connection-type application data and the service quality parameter indicates that it is easy to accept a call setup delay request, A is added without adding application data to the signaling message.
When the TM signaling procedure is performed and the protocol type is connectionless type application data and the service quality parameter indicates that the call setup delay request is unacceptable, the application data is added to the signaling message and the ATM signaling is performed. Since the procedure is executed, the number of various data including the signaling message can be reduced, and the throughput of the entire communication can be improved.

According to the fourth aspect of the present invention, as criterion for determining whether or not it is possible to add application data to the signaling message, a threshold based on the data length of the application data, the application data protocol type identifying means, and Combining the service quality parameter identification means of the application data with each other and selecting whether to add the application data to the signaling message to execute the ATM signaling procedure or to execute the ATM signaling procedure without adding the application data to the signaling message. With such a configuration, the number of various data including the signaling message can be reduced, and the throughput of the entire communication can be improved.

According to the invention of claim 5, wherein, as the criterion for determining whether or not it is possible to add application data to the signaling message, a threshold based on the data length of the application data, the application data protocol type identifying means, and A service quality parameter identification means for application data is provided, and when the data length is equal to or greater than the threshold, the ATM signaling procedure is executed without adding the application data to the signaling message. If it is connection-type application data and the service quality parameter indicates that it is easy to accept a call setup delay request, A is added without adding application data to the signaling message.
When the TM signaling procedure is performed and the protocol type is connectionless type application data and the service quality parameter indicates that the call setup delay request is unacceptable, the application data is added to the signaling message and the ATM signaling is performed. Since the procedure is executed, the number of various data including the signaling message can be reduced, and the throughput of the entire communication can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a protocol concept of an ATM communication device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure of a signaling determination unit of the ATM communication device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram showing a concept of a method for creating a call setup request message in an ATM signaling control unit of the ATM communication device according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram showing a protocol configuration in a conventional ATM communication device disclosed in Japanese Patent Application Laid-Open No. 6-205038.

[Explanation of symbols]

1 sending ATM terminal, 2 receiving ATM terminal, 20 call setup request signaling message, 22 call disconnection signaling message, 101 ATM signaling control unit,
102 signaling determination unit, 110 application data, 111 connection-type application data, 112 connectionless-type application data.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04L 12/28

Claims (5)

(57) [Claims] An ATM communication device for transferring application data using ATM signaling determines whether or not the application data can be added to a signaling message and determines that the application data cannot be added. if you did this,
If it is determined that the application data can be added after the normal call setup procedure, while it is determined that the application data can be added, call setting is performed by placing the identifier indicating the start of the application data and the application data in the signaling message. A signaling determination unit that activates the procedure, and an ATM signaling control unit that executes the ATM signaling procedure.
The signaling determination unit includes a signaling message
Whether application data can be added
The criteria for the application data
Service quality parameter identification means,
Indicates that the parameter is amenable to call setup delay requests
Application message in the signaling message if
Executes ATM signaling procedure without adding application data
And the above service quality parameter receives a call setup delay request.
If it indicates that it is difficult to
An ATM communication apparatus characterized by adding application data to a message and executing an ATM signaling procedure. 2. In an ATM communication method of an ATM communication device for transferring application data using ATM signaling, it is determined whether or not the application data can be added to a signaling message.
If it is determined that the application data cannot be added, the application data is transferred after a normal call setup procedure, while if it is determined that the application data can be added, the application data is added to the signaling message. of placing the identifier and the application data indicating the beginning to start the call setup procedure, Apu the signaling message
To determine whether application data can be added.
As the cross-sectional basis, the application data service
Provide quality parameter identification means, and
Indicates that the meter is willing to accept call setup delay requests.
If the signaling message
Perform the ATM signaling procedure without adding data,
The above service quality parameters accept the call setup delay request
Signaling message indicates that it is difficult to
A of an ATM communication apparatus, characterized in that application data is added to a message and an ATM signaling procedure is executed.
TM communication method. 3. An application using ATM signaling.
In an ATM communication device that transfers
Append the above application data to the nulling message
Judge whether the application can be added
If it is determined that the application data cannot be added,
After the normal call setup procedure, transfer the above application data
On the other hand, while adding the above application data.
If it is determined that the
Identifier indicating the beginning of the application data
Call setup procedure with the above application data.
An ATM signaling device having a
An ATM signaling controller for performing a signaling procedure,
The signaling determination unit may determine whether the application data can be added to the signaling message by using a threshold based on the data length of the application data,
Protocol type identification means, and the application data
Data service quality parameter identification means,
If the data length is greater than the threshold,
ATM system without adding application data to the message
Execute the Gnarling procedure and the data length is below the threshold
And the above protocol type is a connection type application
Application data and the service quality
Indicate that the parameter is easy to accept a call setup delay request
The application
Performs ATM signaling procedure without additional data
And the above protocol types are connectionless applications
Application data and the above service quality parameters.
Indicates that the data is unacceptable for call setup delay requests
In such a case, the ATM communication apparatus performs an ATM signaling procedure by adding application data to a signaling message. 4. An application using ATM signaling.
In an ATM communication device that transfers
Append the above application data to the nulling message
Judge whether the application can be added
If it is determined that the application data cannot be added,
After the normal call setup procedure, transfer the above application data
On the other hand, while adding the above application data.
If it is determined that the
Identifier indicating the beginning of the application data
Call setup procedure with the above application data.
An ATM signaling device having a
An ATM signaling controller for performing a signaling procedure,
The signaling determination unit includes a signaling message
Whether application data can be added
The criteria for the application data
Threshold based on the data length,
Protocol type identification means, and the application data
Service quality parameter identification means
Application data in the signaling message
Or perform an ATM signaling procedure or
Add application data to the nulling message
ATM communication device comprising a this <br/> for selecting whether to perform the ATM signaling procedure without. 5. An application using ATM signaling.
ATM communication method for ATM communication equipment that transfers application data
Method, the signaling message
Judge whether or not the application data can be added,
The above application data cannot be added
If it is determined that the
Application data, while the application data
If it is determined that data can be added,
The start of the above application data is included in the nulling message.
The application data.
As a criterion for determining whether application data can be added to a signaling message, a threshold based on the data length of the application data, a protocol type identification means for the application data, and the application data If the data length is equal to or larger than the threshold, the ATM signaling procedure is performed without adding application data to the signaling message, and the data length is equal to or smaller than the threshold. If the protocol type is connection-type application data and the service quality parameter indicates that the call setup delay request can be easily accepted, do not add application data to the signaling message. When the TM signaling procedure is executed, the application data is added to the signaling message when the protocol type is connectionless application data and when the service quality parameter indicates that the call setup delay request is unacceptable. An ATM communication method for an ATM communication device, characterized by executing an ATM signaling procedure.