KR0128872B1 - How to generate wideband transmission end message in wideband asynchronous transmission mode - Google Patents

Abstract

The present invention relates to a method for generating a transmission end message in a wideband asynchronous transmission mode. The present invention relates to an information identification bit of a restart indication message composed of eight 8-bit octets and an eight-bit octet including an information bit. The first step of assigning and storing the address, the second step of generating and storing an 8-bit octet indicating the transmission end indication, the second step of assigning and storing the address, detecting the length of the transmission end message and forming the 8-bit octet, And a fourth step of assigning and storing an address to the length of the formed transmission end message and a fourth step of outputting the length and address of the transmission end message.

Description

How to generate wideband transmission end message in wideband asynchronous transmission mode

According to the present invention, in the asynchronous transfer mode (hereinafter referred to as ATM), in particular, in the Q.93B protocol, a broadband complete transmission (sending complete) indicating completion of a called party number is completed. A method for generating a wideband transmission end message suitable for generating a message).

In general, ATM is a communication scheme for implementing a Broadband Integrated Service Digital Network (BISDN), and is a special type of packet type transfer scheme using Asynchronous Time Division Multiplex (ATDN).

In addition, in BISDN, information is transmitted by a continuous flow of packets having a constant size. The fixed size packets are called ATM cells, and the service inputted as shown in FIG. The information 11 is divided into short cells 12 of fixed length, and packetized by attaching 5 bytes of headers 12a to each cell. Each ATM cell has a total of 53 bytes. (Data 48 + header 5) and each ATM cell is multiplexed and transmitted.

The ATM cell is a connectivity method, and establishes a virtual channel to deliver service information. When the virtual channel is established, a connection identification number is assigned, and the identification number is released when the connection is released. In addition, the order between ATM cells in a certain virtual channel is preserved by the function of the ATM layer, and signal information for connection establishment is transmitted through a separate ATM cell.

On the other hand, the ATM scheme defines a layered protocol model for systematic and flexible information transfer. At this time, the protocol layer that is established is the physical layer 21, ATM layer 22, ATM adaptation layer 23 and the upper layer 24, as shown in Figure 2 will be described in detail as follows.

In other words, ATM's protocol reference model consists of management plane (A), control plane (B), and user plane (C), and among them (A, B, C) management plane (A) functions plane management and hierarchy management. Separated by.

The plane management refers to the overall management of the system, hierarchical management refers to the management of resources and usage variables, the control plane (B) manages call control and connection control information, and the user plane (C) manages the transfer of user information. do.

In addition, the protocols of the control plane (B) and the user plane (C) are divided into a higher layer 24, an ATM adaptation layer 23, an ATM layer 22, a physical layer 21, and the like. It consists of a convergence sublayer that makes user service information of the upper layer 24 into protocol data units, and a delivery and re-defective layer that forms a user information section of an ATM cell by transferring protocol data units.

ATM layer 22 controls user-to-network access and information flow, translates virtual path identification numbers and virtual channel identification numbers to connect with service access points, multiplex and demultiplex cells, and physical layer 21 It consists of a transmission convergence sublayer and a physical medium sublayer, and performs separation of cell speeds, generation and confirmation of header error control bytes, detection of cell boundary points, and the upper layer 24 of the user plane C processes service information. Provides functions regarding

In addition, the upper layer 24 of the control plane B provides functions relating to call setup, call control, and call connection, which are achieved by exchanging control signal messages between user-networks. The control signal message may be divided into call setup, call information, call release, and additional information message according to each function.

At this time, the call setup message is subdivided into call processing, connection, connection recognition, call setup, etc., the call information message is subdivided into call resume, resume recognition, etc., and the call release message is released. The ITU-TS Recommendation Q.93B protocol message control format for each control signal message described above is shown in FIG.

That is, the user-to-many ATM call and the connection control message, as shown in FIG. 3, are a protocol discriminator signal 31 for determining the user-to-manage call control message from other messages, the user-manganese. Call rederence signal 32, message type signal 33, and message length signal 34 for detecting the call destination that transmitted the message of the interface are basically configured and each control It is defined to include the variable length information 35 required according to the function of the signaling message.

In addition, as shown in FIG. 4, the variable length information 35 required for each of the above functions includes an information identifier 41, a coding standard 42, and an information information element. instruction 43, information length 44, and information content 45, and in particular, a broadband transmission end message indicating the end of the called party number of variable length information 35 according to the required function. The message format has been prepared.

However, as described above, although the recommendation for the format of the broadband transmission end message included in the variable length information required according to the function of the various control signal messages indicating the end of the called party number has been prepared, such broadband transmission end The method of generating a message or a device for realizing the message has not been suggested until now.

Accordingly, the present invention provides a message generating method capable of generating a wideband transmission end message indicating the end of a called party number by being included in variable length information required according to the function of various control signal messages in the Q.93B protocol in the asynchronous transmission mode. The purpose is to provide.

In order to achieve the above object, the present invention provides a method for generating a wideband transmission end message included in variable length information in an asynchronous transmission mode Q.93B signaling protocol indicating the end of a called party number. A first step of addressing and storing each of an information command and an information command consisting of 8-bit octets, including an information identification bit and an extension bit of the wideband transmission end message composed of octets; A second step of generating, assigning and storing an 8-bit octet indicating the transmission end indication; Detecting the length of the transmission end message to form an 8-bit octet, and giving and storing an address to the length of the transmission termination message formed of 8-bit octets; And a fourth step of extracting the length and address of the stored scene termination message and outputting the same to the transport channel.

In addition, the message generating method according to the present invention initializes the length of the transmission end message to the first setting value, and subtracts the second setting value from the initialized first setting value to detect the length of the transmission end message. do.

1 is a general ATM cell format diagram.

2 is a general protocol reference model diagram of a wideband asynchronous transmission mode.

3 is a message format diagram of a general Q.93B protocol.

4 is a general format diagram for variable length information required according to the function of a control signal message.

5 is a hardware configuration diagram for practicing the present invention.

6 is a format diagram of a broadband transmission end message of the present invention.

7 is a detailed flowchart illustrating a process of generating a broadband transmission end message according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

61: Q.93B information providing unit 62: control unit

63: storage unit 64: address and length detection unit

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a hardware configuration diagram for generating a broadband transmission end message according to the present invention. The Q.93B information providing unit 61 providing information about the Q.93B protocol receives the information about the Q.93B protocol. A control unit 62 for controlling generation of the wideband transmission end message, a storage unit 63 storing the wideband transmission end message generated by the control unit 62, and an address and information length for the generated wideband transmission end message; It consists of an address and length detector 64 for outputting the same and performs the following operation.

In general, the broadband transmission end message according to the recommendation is the CCITT standardized code standard consisting of the information identifier 51 of the broadband transmission end message composed of bit octet of 01100010, bit '00', as shown in FIG. 52), an information command 53 consisting of bits '00000', an information length L consisting of two octets indicating the length of a broadband transmission end message, and an end of transmission indication indicating end of transmission consisting of bit '0100001' ( 54).

Therefore, the control unit 62 sends the protocol determination signal 31 for determining the user-to-network call control message from the other messages from the Q.93B information providing unit 61, and the call destination which transmitted the message of the user-to-network interface. Wideband transmission of the present invention after receiving the information about the call reference signal 32, the message format signal 33, and the message length signal 34 for detection to generate a basic configuration for a message relating to general Q.93B. Generates a termination message.

That is, when the Q.93B information providing unit 61 outputs the 8 bit octet of '01100010' of the Q.93B information providing unit 61 to generate the wideband transmission end message, the control unit 62 ends the wideband transmission. Recognizing that the message is generated by the Q.93B information providing unit 61, an 8-bit octet that is the information identification bit 51 of the wideband transmission end message received from the Q.93B information providing unit 61, an encoding standard 52 including an extended bit, and an information command ( 53 is assigned to each 8-bit octet, and an 8-bit octet is generated by logically combining the transmission end indication 54 and '10000000' indicating the transmission end received from the Q.93B information providing unit 61. After that, the total length L of the wideband transmission end message and the generated wideband transmission end message are stored in the storage unit 63.

Accordingly, the message address and length detector 64 detects the address and information length of the generated broadband transmission end message and outputs the address and information length to the ATM network through a transmission channel (not shown) to transmit the broadband transmission end message.

7 illustrates an embodiment of a method for generating a broadband transmission termination message of the present invention.

First, when the control unit 62 receives the octet information of '01100010' from the Q.93B information providing unit 61, the information identification bit 51 of the broadband transmission end message (400) indicates that the message is generated. Recognizing and giving the first address to the identification bit 51 of the broadband transmission end message received from the Q.93B information providing unit 61 (A0) (401), the octet information of '10000000' is received and the second address ( After A1) is assigned (402), the identification bit 51 of the broadband transmission end message of '01100010' and the octet information of '10000000' are stored in the storage unit 63, respectively, while the length (L) of the broadband transmission end message is obtained. ) Is set to 5 (L1 = 5) (403).

In this case, the bit '1', which is the most significant bit of the octet information '10000000' to which the address A1 has been assigned in step 402, represents an extended bit, and the bit '00' located in the 7-bit and 6-bit positions represents the CCITT standardized code standard ( 52), and the bit '00000' positioned 5 bits from the least significant bit represents the information command 53.

In addition, if the extension bit located at the most significant bit of the 8-bit octet message is '0', it indicates that the current message is composed of group octets (multiple octets). It is composed of octets.

After the above process, it is composed of bit '0100001' and logically adds an 8-bit octet of '100000000' to the transmission end indication indicating the end of transmission, generates an 8-bit octet of '10100001', and gives an address to the storage unit 63. Save (404).

After the above process, the length L of the wideband transmission end message is stored in the third address A2 and the fourth address A3. Typically, the length of the message is a sign standard including an 8-bit octet constituting an identification bit and an extension bit. The length of the message is represented by the number of octets excluding the 8-bit octet composed of and information commands and the two 8-bit octets forming the length of the information message.

Accordingly, the control unit 62 subtracts 4 from the length L1 of the message set in step 403 (L = L1-4) (405), and calculates the wideband transmission end message length L and the logic calculated in step 405. After multiplying 1111111100000000 by shifting it 8 bits to the right, the upper 8 bits of the broadband transmission end message length (L) are formed into octets. Save (406).

In addition, the lower-order 8 bits of the wideband transmission end message length are formed as octets by logically multiplying the wideband transmission end message length L and the logic 0000000011111111 calculated in step 405, and the fourth address (A3) is given to the formed octet and stored therein. Stored in section 63 (407).

After the above process, the control unit 62 detects the address and message length of the broadband transmission end message stored in the storage unit 63 and outputs it to the address and length detection unit 64. The address and length detection unit 64 outputs the transmission channel. It outputs to the ATM network via 408.

As described above, according to the present invention, the Q.93B signaling protocol of ATM provides a high-speed generation of a broadband transmission end message included in the variable length information indicating the end of the called party number and provided to the ATM network side, thereby providing the Q of the ATM. The signaling process for communication control between networks in .93B signaling protocol can be effectively realized.

Claims (4)

A method for generating a wideband transmission end message included in variable length information in an asynchronous transmission mode Q.93B signaling protocol indicating termination of a called party number, the information of the wideband transmission end message consisting of input 8-bit octets. A first step of addressing and storing each of a code standard and an information command consisting of an 8-bit octet including an identification bit and an extension bit; A second step of generating, assigning and storing an 8-bit octet indicating the transmission end indication; Detecting a length of the transmission end message to form an 8-bit octet, and giving and storing an address to the length of the transmission termination message formed of 8-bit octets; And a fourth step of retrieving the length and address of the stored transmission termination message and outputting the address to the transmission channel. The method of claim 1, wherein the length detection of the transmission end message of the third step comprises: a first step of initializing the length of the transmission end message to a first set value; And a second process of detecting a length of a transmission end message by subtracting a second setup value from the first setup value initialized in the first process. . The method of claim 2, wherein the first set value for the transmission end message length is set to 5 and the second set value is set to 4. . The method of claim 1, wherein the second step comprises '0100001' and logically adds an 8-bit octet of '100000000' to the transmission end indication indicating the end of transmission, generates an 8-bit octet of '10100001', and gives an address. Method of generating a transmission end message in the broadband asynchronous transmission mode, characterized in that for storing it.