KR970002791B1 - Bearer capability information message generating method of broadband asynchronous transmission mode - Google Patents

Abstract

A generating method of the transmission capacity information message for the broadband asynchronous transmission mode(B-ATM) whereby the information is the indication that the broadband connection requested in the Q.93B protocol is adaptive in the transmission capacity provided from the network.

Description

How to Generate a Transmission Capacity Information Message for Wideband Asynchronous Transmission Mode

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 in accordance with the function of a control signal message.

5 is a general message format diagram for broadband transmission capacity information applied to the present invention.

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

7 is a format diagram for a wideband upper layer information format applied to the present invention.

8 is a detailed flowchart illustrating an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

61: Q93B information providing unit 62: control unit

63: storage unit 64: address and length detection unit

In the present invention, in the asynchronous transmission mode (hereinafter referred to as ATM), in particular, the broadband transmission capacity information indicating that the broadband connection required by the Q.93B protocol (protoco1) is adaptive to the transmission capacity provided by the network side is generated. The present invention relates to a method for generating a broadband transport capacity information message.

In general, ATM is a special type of packet message delivery method using Asynchronous Time Division Multiplex (ATDM) as a communication method for implementing a Broadband Integrated Service Digital Network (BISDN).

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 when the ATM cell is described in detail, service information (as shown in FIG. 11) The information is packetized by dividing the 11 cells into short cells 12 of fixed length and attaching a 5 byte header 12a to each cell. Each ATM cell has a total of 53 bytes (data). 48+ headers 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.

Meanwhile, the ATM scheme defines a layered protocol model for systematic and flexible information transfer. The protocol layer envisioned at this time is a physical layer 21, an ATM layer 22, an ATM adaptation layer 23 and an upper layer 24, etc., as shown in FIG.

In other words, ATM's protocol reference model is composed of management plane (A), control plane (B), and user plane (C), and the functions of (A, B, C) management plane (A) among them are 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, 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 truncation and recombination layer layer that cuts the protocol data units to form a user information section of an ATM cell.

The ATM layer 22 translates the control of the user-network connection and information flow, translates the virtual path identification number and the virtual channel identification number to perform connection with service access points, multiplexing and demultiplexing of cells, and the physical layer 21 It is composed of transmission convergence sublayer and physical media sublayer, and performs separation of cell speed, generation and confirmation of header error control byte, detection of cell boundary point, etc., and upper layer 24 of user plane C processes service information. Provides functions regarding

In addition, the upper layer 24 of the control plane B provides functions related to call setup, call control, and call connection, wherein call setup, call control, and call connection are made 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, call setup message is subdivided into call processing, connection, connection recognition, call setup, call information message is subdivided into call resume, resume recognition, etc., and call release message is released and returned. Subdivided into Done, etc., the lTU-TS Recommendation Q.93B protocol message control format for each control signal message described above is shown in FIG.

That is, the user-manganese ATM call and the access control message are the protocol discriminator signal 31 for determining the user-manganese call control message from other messages as shown in FIG. 3, the message of the user-manganese interface. All reference signal (32), message type signal (33), message length signal (34) are basically configured to detect the call destination that transmits The variable length information 35 required according to the function is defined to be included.

In addition, the variable length information 35 required for each of the above functions includes an information identifier 41, a coding standard 42, an information element inshuction (as shown in FIG. 4). 43) a broadband transmission capacity, consisting of information length 44 and information content 45, in particular indicating that the required broadband connection of the variable length information 35 according to the required function is adaptive to the transmission capacity provided by the network side. The broadband transmission capacity information message for generating information is an information identifier 51 of broadband transmission capacity information composed of 8 bit octets of 0110l101, CCITT standardized code standard 52 composed of 2 bits of 00, as shown in FIG. , An information command 53 consisting of 00000, two octets, an information length (L) indicating a lack of broadband upper layer information, a transmission class 54, and a transmission capacity information content 55 according to the transmission class. All.

However, although the above-mentioned recommendations on the format of the broadband upper layer information message have been prepared, no method or apparatus for generating the recommendation has been presented until now.

Accordingly, an object of the present invention is to provide a method for generating a broadband transmission capacity information message indicating that a broadband connection required in the Q.93B protocol is adaptive to a transmission capacity provided at a network side.

The present invention provides a first address for addressing and storing each of a code standard and an information command composed of 8-bit octets, including a wideband transmission capacity information identification bit composed of 8-bit octets inputted to achieve the above object, and a make-up bit. A second step of generating and addressing the required capacity information according to the contents of the transmission class bits inputted, and storing and storing the content of the capacity information, and detecting the length of the broadband capacity information message to form an 8-bit octet and forming an 8-bit octet. And a fourth step of assigning and storing an address to the length of the broadband transmission capacity information message, and a fourth step of outputting the length and address of the broadband upper layer information message.

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

6 is a hardware configuration diagram for generating a broadband transmission capacity information message according to the present invention. The Q.93B information providing unit 61 which provides information about the Q.93B protocol receives the information about the Q.93B protocol. A control unit 62 for controlling generation of the broadband transmission capacity information message, a storage unit 63 storing information on the broadband transmission capacity generated by the control unit 62, and an address for the generated broadband transmission capacity information message. And an address and length detector 64 for detecting and outputting the information length to perform the following operation.

In general, the broadband upper layer information message includes information identifying bits 51, CCITT standardized code standard 52, information command 53, information length (L), and transmission class of broadband upper layer information, as shown in FIG. 54, and transmission capacity information content 55, which is described in more detail, the transmission class 54 is divided into Class-A, Class-C, and Class-X as shown in FIG. , The transmission capacity information content 55 is a traffic type (Fig. 7 (B), 55a), timing requirements (Fig. 7 (C), 55b), susceptibility to clipping (D, 55c), and user plane connection configuration (FIG. 7E, 55d).

At this time, the class-A consists of 00001, the class-C consists of 00011, and the class-X consists of 10000.

In addition, when the traffic format 55a is 000, it indicates 'no indication', and when it is 001, it indicates 'fixed bit rate', and when it is 010, it indicates 'variable bit rate' (Fig. 7 (B)). If the timing request 55b is 00, it indicates 'unspecified'; if it is O1, it indicates 'end to end' that requires timing; if 10, 'end-to-end that does not require timing' 11 indicates 'reserved'. In addition, when the clipping sensitivity 55c is 00, it indicates' no sensitivity to clipping ', and on 01, it indicates' there is sensitivity to clipping', and when the user plane connection type 55d is 00, the 'point to point ( point to point ', and in the case of 01, it indicates' point to multipoint'.

Therefore, the control unit 62 detects the protocol determination signal 31 for determining the user-network call control message from the Q.93B information providing unit 61 from another message, and the call destination for transmitting the message of the user-network interface. After receiving the information about the call reference signal 32, the message format signal 33, and the message length signal 34 and generating the basic configuration for the message relating to general Q.93B, the broadband transmission capacity information of the present invention. Generates a message.

That is, when the Q.93B information providing unit 61 outputs the broadband transmission capacity information identification bit 51 (logic '01011110') to generate the broadband transmission capacity information message, the control unit 62 sends a message regarding the broadband transmission capacity information. An 8-bit octet that is the wideband transmission capacity information identification bit 51 received from the Q.93B information providing unit 61 and the code standard 52 including the extended bits and the information command 53. The capacity information content 55 required according to the broadband transmission class 54, i.e., Class-A, Class-B, and Class-C, which is assigned an address to the octet and received from the Q.93B information providing unit 61, respectively. After generating the data, the total length L of the broadband transmission capacity information message and the generated broadband transmission capacity information message are stored in the storage unit 63.

Therefore, the message address and length detector 64 detects the address and information length of the generated broadband transport capacity information message and outputs it to the ATM network so that the broadband transport capacity information message is delivered.

8 illustrates an embodiment of a method for generating a broadband transmission capacity information message according to the present invention.

First, when the control unit 62 receives octet information of '01011110', which is the broadband transmission capacity information identification bit 51 from the Q.93B information providing unit 61 (100), it recognizes that the message is generated for the broadband transmission capacity information. After assigning the first address to the broadband transmission capacity information identification bit 51 received from the Q.93B information providing unit 61 (A0) (101) after receiving '10000000' and assigning the second address (Al) (102) The broadband transmission capacity information identification bit 51 of '01011110' and the octet information of '10000000' are respectively stored in the storage unit 63, while the length of the broadband transmission capacity information message (set L to 4 (L1 = 4)). (103).

In this case, logic '1', which is the most significant bit of octet information '10000000' assigned with address Al in step 102, represents an extended bit, and logic '00' located in 7-bit and 6-bit positions represents a CC1TT standardized code standard (52). Logic '00000' positioned 5 bits from the least significant bit represents the information command 53.

If the extended bit located at the most significant bit of an 8-bit octet message is '0', the current message is composed of group octets (multiple octets). If it is '1', the current message is a single octet. It is configured.

After the process, the control unit 62 reads the transmission class bit 54 (104) and determines whether the transmission class bit is Class-A, Class-C, or Class-X (105) according to the transmission class. Generate the required transmission capacity information content 55.

That is, if the transmission class 54 is class-A, the controller 62 adds an address A4 to the logic '10000001' generated by adding the logic '00001' representing the class-A to the logic '10000000' and then adds the address A4. When storing 106 in the storage unit 63, and receiving the 2-bit clipping sensitivity bit 55c from the Q.93B information providing unit 61, it shifts it 5 bits to the left and shifts the user plane connection type bit 55d. After receiving and logically adding the 5-bit shifted clipping sensitivity bit 55c, the logic '0000000', and the user plane connection type bit 55d, an address A5 is given and stored in the storage unit 63 (107). .

Therefore, if the transmission class 54 is Class-A, the length L of the broadband transmission capacity information message set in step 103 becomes 6 (L2 = 6) (108).

On the other hand, if the transmission class 54 is Class-C in step 105, the controller 62 adds the logic '00011' representing the class-C to the logic '10000000' and the address 'A4' to the logic '100000l1'. And store it in the storage unit 63 (109). When the clipping sensitivity bit 55c consisting of 2 bits is received from the Q.93B information providing unit 61, it is shifted 5 bits to the left and the user plane connection type bit is received. Receives 55d and logically adds the 5-bit shifted clipping sensitivity bit 55c, the logic '10000000', and the user plane connection type bit 55d, and then stores an address A5 in the storage 63. (110).

Therefore, if the transmission class 54 is Class-C, the length L of the broadband transmission capacity information message set in step 103 becomes 6 (L2 = 6) (111).

In addition, in step 105, if the transmission class 54 is class-X, the controller 62 assigns an address A4 to the logic '00010000' representing the class-X and stores it in the storage unit 63 (112). ), Receives the traffic format bit 55a consisting of 3 bits from the Q.93B information providing unit 61, shifts it 2 bits to the left, and receives the timing request bit 55b to shift the traffic format bit 55a. ), The timing request bit 55b and the logic '10000000' are logically added, and then the address A5 is given and stored in the storage unit 63 (113).

After the 113 process, the controller 62 receives the clipping sensitivity bit 55c composed of 2 bits from the Q.93B information providing unit 61, shifts it 5 bits to the left, and receives the user plane connection type bit 55d. After adding the logic of the 5-bit shifted clipping sensitivity bit 55c, the logic '10000000', and the user plane connection type bit 55d, the address A5 is given and stored in the storage unit 63. (114)

Therefore, if the transmission class 54 is class-X, the length L of the broadband transmission capacity information message set in step 103 becomes 7 (L2 = 7).

After the above process, the length L of the broadband transmission capacity information message is stored in the third address A2 and the fourth address A3. Typically, the length of the message is an 8-bit octet constituting an identification bit and a code including an extension bit. The length of the message is represented by the number of octets excluding the 8-bit octet composed of standard 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 L2 of the broadband transmission capacity information message calculated in step 108, 111, or 115 (L = L2-4) (116), and calculates the broadband transmission capacity information calculated in step 116. After multiplying the message length (L) by the logic 1111111100000000, shifting it 8 bits to the right to form the upper 8 bits of the broadband transmission capacity information message length (L) into octets, and giving the third address (A2) to the formed octet. The data is stored in the storage unit 63 (117).

In addition, the lower-order 8 bits of the broadband transmission capacity information message length are formed by octet by logically multiplying the broadband transmission capacity information message length (L) calculated in step 116 by the logic 0000000011111111, and the storage unit is assigned to the fourth address (A3). Stored at (63) (118).

After the process, the control unit 62 detects the address and message length of the broadband transmission capacity information 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 then outputs this to the ATM network. Output to (119).

As described above, the present invention has the effect of generating a broadband transmission capacity information message at high speed and speed.

Claims (14)

The first step of addressing and storing each of the code standard and the jumbo command composed of 8-bit octets including the 8-bit octets of the wideband transmission capacity information identification bit including the extended bits, and the contents of the inputted transmission class bits. According to the second step of generating the contents of the transmission capacity information required according to the address and storing the contents, the length of the broadband transmission capacity information message formed of 8 bit octets by detecting the length of the broadband power capacity information message is formed. And a fourth step of giving an address to and storing the address, and a fourth step of outputting the length and address of the broadband upper layer information message. The method of claim 1, wherein the length detection of the wideband capacity information message of the third step comprises initializing the length of the wideband capacity information message to a preset value, and addressing the capacity information required according to the content of the transmission class bit. Setting a value obtained by adding an address number to the preset initial value each time is set to a length of a broadband transport capacity information message, and in the second step, broadband capacity information to which an address number is added to a preset initial value And detecting the length of the broadband transmission capacity information message by subtracting a preset value from the message length. 3. The method of claim 1 or 2, wherein the second step generates and assigns an 8-bit octet containing a class-A bit when the transmission class is class-A, and includes an 8-bit including a clipping sensitivity bit and a user plane connection type bit. The first step of generating a bit octet and assigning an address and storing the bit octet; if the transmission class is class-C, generates an 8-bit octet including the class-C bit and assigns the address and includes a clipping sensitivity bit and a user plane connection type bit. The second process of generating and assigning an 8-bit octet and storing it; if the transmission class is class-X, generates an 8-bit octet including the class-X bit and gives it an address, and includes the traffic type bit and the timing request bit. Creates an address by assigning a bit to an address, generates an 8-bit octet that contains a clipping sensitivity bit and a user plane connection type bit, and then assigns the address. A method for generating a transmission capacity information message in a wideband asynchronous transmission mode, characterized in that the loading is performed in a third process. 4. The method of claim 3, wherein the length of the broadband transmission capacity information message of the third step is formed by two octets, and is given by a code standard consisting of 8-bit octets including extended bits and an address next to an address given to an information command. Method for generating a transmission capacity information message of the wideband asynchronous transmission mode, characterized in that the storage. 5. The value of claim 4, wherein the initial value of the broadband transmission capacity information message length is set to 4, the initial value set to 4 and the number of address assignments are added, and the initial value set to 4 and the number of address assignments are added. And subtracting 4 again to indicate the length of the broadband transmission capacity information message. The method of claim 3, wherein the first process performs a logic operation on a logic '00001' representing a class-A in a logic '10000000' when the transmission class is class-A, generates an 8-bit octet, gives an address thereto, and stores the same. When the process receives the clipping sensitivity bit, it shifts it 5 bits to the left, logically operates the 5 bit shifted clipping sensitivity bit, logic '10000000', and the user plane connection type bit, generates an 8-bit octet, and gives an address. Method for generating a transmission capacity information message of the wideband asynchronous transmission mode, characterized in that the storage process. 7. The method of claim 6, wherein an 8-bit octet of logic '10000001' is generated by logically adding a logic '00001' representing a class-A to the logic '10000000'. Way. The transmission capacity of the wideband asynchronous transmission mode according to claim 6 or 7, wherein an 8-bit octet is generated by logically adding the 5-bit shifted clipping sensitivity bit, a logic '10000000', and a user plane connection type bit. How to generate informational messages. 4. The method of claim 3, wherein the second process performs an operation on a logic '00011' representing a class-C to a logic '10000000' by generating a 8-bit octet by assigning an address to the logic '10000000' and storing the address. When the process receives the clipping sensitivity bit, it shifts it 5 bits to the left, and generates an 8-bit octet by logically operating the 5-bit shifted clipping sensitivity bit and logic '10000000' and the user plane connection type bit. Method for generating a transmission capacity information message of the wideband asynchronous transmission mode, characterized in that the storage process 10. The transmission capacity information message generation method according to claim 9, characterized by generating an 8-bit octet of logic '10000011' by adding a logic '00011' representing a class-C to the logic '10000000'. Way. The transmission capacity of the wideband asynchronous transmission mode according to claim 9 or 10, wherein an 8-bit octet is generated by logically adding the 5-bit shifted clipping sensitivity bit, a logic '10000000', and a user plane connection type bit. How to generate an information message. 4. The method of claim 3, wherein the third process comprises: addressing and storing a logic '00010000' representing a class-X when the transmission class is class-X, shifting the traffic format bit 55a two bits to the left, and A process of generating an 8-bit octet by logical operation of the traffic type bit, timing request bit, and logic '10000000' which are shifted by 2 bits, and then storing the address by giving an address, shifting the clipping sensitivity bit 5 bits to the left and shifting the 5 bits. A method of generating a capacity information message in a wideband asynchronous transmission mode, characterized in that a logical operation is performed on a clipping sensitivity bit, a logic '10000000', and a user plane connection type bit to generate an 8-bit octet, and then assign and store the address. 13. The method of claim 12, wherein an 8-bit octet is generated by logically adding the two-bit shifted traffic type bit, timing request bit, and logic '10000000'. The transmission capacity of the wideband asynchronous transmission mode according to claim 12 or 13, wherein an 8-bit octet is generated by logically adding the 5-bit shifted clipping sensitivity bit, a logic '10000000', and a user plane connection type bit. How to generate informational messages.