KR0134438B1 - Method for detecting partially filled cells within aal parameters message in atm - Google Patents

Abstract

The present invention is an integer for the number of leading octets in the AAL parameter message in the setup message included in the broadband sublayer information, particularly in the asynchronous transmission mode (abbreviated as ATM) in the Q.93B protocol. The present invention relates to a method for detecting partially filed cell information representing an indication. To this end, the present invention receives a setup message or an add-party message input from an information park, stores it in a predetermined address in memory, and then stores the setup message or add-in. Detecting length information of 2 octets for a party message and storing it in a predetermined address in a memory, a counter value set to a predetermined value to recognize an AAL parameter message, which is variable length information following the header information of the corresponding message, is 1 Successively increasing each other to determine its identifier If the information identifier of the AAL parameter message is determined, the length information of its two octets is detected and stored in a predetermined address of the memory, and the header located at the front end to find the corresponding octet including the AAL format information in the AAL parameter message. A counter value is updated by setting the octet length of the information to the sum value, and the logical product operation of the octet information and any bit value stored in the memory is performed to detect the AAL type information from the octet obtained in the update process. In order to recognize the partial file information of AAL format -1 of the next octet, which is the content information based on the AAL format information, the information identifier is determined by continuously increasing the counter value set to a predetermined value by one. And the number of octets preceded by AAL format -1, which is the content information obtained through this discrimination process. In response to the seventh step of determining the information value of the partially filed cell of the next octet of the information identifier based on the preset reference value, the terminal outputs the service information corresponding to the information value and provides it to the network. By efficiently and quickly detecting partial file information in a parameter message and providing the corresponding service information to the network, an effective message interface of a real time concept between the terminal and the network is realized.

Description

Detection of Partially Filed Cell Message in AMT Adaptation Layer Parameter Message in Asynchronous Transmission Mode

1 is a format diagram showing a data structure for a typical ATM cell

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

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

4 is a diagram showing the configuration of a setup message and an ad party message according to the present invention.

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

6 is a format diagram of a general AAL parameter message type according to the present invention.

7 is a view showing various types of AAL format information included in an AAL parameter message related to the present invention.

8 is a data format diagram for an AAL format-1 message following the content information based on the AAL format information.

9 is a format diagram for each piece of information having various types of values included in the AAL format-1 message related to the present invention.

10 is a data format diagram for an AAL format-3 / 4 message following the content information based on the AAL format information.

11 is a data format diagram for an AAL format-5 message followed by the content information based on the AAL format information.

12 is a data format diagram for a user-defined AAL message that follows the content information based on the AAL format information.

13 is a schematic block diagram of a system for implementing the present invention.

14 is a flowchart illustrating a process of detecting partial filed cell information included in an AAL parameter message according to a preferred embodiment of the present invention.

15 is a diagram illustrating an address used to describe a process of detecting partially filed cell information according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: information provider 10a: ATM

10b: AAL format 512: control unit

14: storage unit

According to the present invention, in the Asynchronous Transmission Mode (hereinafter, simply referred to as ATM), the ATM adaptation layer parameters included in the broadband sublayer information in the Q.93B protocol are specifically referred to as AAL parameters. Abbreviated method) relates to a method for detecting partially filled cells messages in a message.

In general, ATM is a communication method for implementing a Broadband Integrated Service Digital Network (hereinafter, abbreviated as BISDN), and is a special type using an asynchronous time division multiplexer (ATDM). Packet-type message delivery.

On the other hand, in BISDN, information is transmitted by a continuous flow of packets having a constant size. The packets of fixed size are called ATM cells. More specifically, the ATM cell divides a plurality of service information 11 having a predetermined bit rate (identity bit rate, variable bit rate, etc.) into short cells 12 of fixed length, as shown in FIG. After that, packetized information is attached by attaching header information 12a of 5 bytes to each cell. Each ATM cell has a total of 53 bytes (data information 48 + header information 5). Each of these ATM cells, as shown at the bottom of FIG. 1, is multiplexed 13 and transmitted over a transport channel to a terminal or network.

In addition, as described above, the ATM cell is a connectivity method, and establishes a virtual channel to transmit service information. When the virtual channel is established, an identification number for connection is given and the identification number is released together 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 communication scheme as described above defines a layered protocol reference model for systematic and flexible information delivery. In this case, the protocol layer envisioned is a physical layer 21, an ATM layer 22, an ATM adaptation layer 23, an upper layer 24, and the like, as shown in FIG. As follows.

That is, the protocol reference model of ATM consists of a management plane (A), a control plane (B), and a user plane (C), and the functions of the management plane (A) among the three planes (A, B, and C) are planes. It is divided into management and hierarchy management.

Here, plane management means overall management of the system, and hierarchy management means management of resources and variables used. In addition, the control plane (B) manages call control and connection control information, and the user plane (C) manages the transfer of user information.

Further, the protocol of the control plane (B) and the user plane (C) is divided into a higher layer 24, an ATM adaptation layer (AAL) 23, an ATM layer 22, a physical layer 21, and the like. Although not shown in the figure, the ATM adaptation layer 23 is classified into a resin and the ATM cell by cutting the convergence sublayer and the protocol data unit, which makes the user service information of the upper layer 24 into the protocol data unit, to a predetermined size. It consists of a cut and a recombination layer forming a user information section of.

In addition, when the ATM adaptation layer 23 is horizontally classified, the U-SDU (service data unit) having an equal bit rate is transmitted between the information source and the destination at the same bit rate along with related time information, and the recovery error and AAL-1, a real-time U-SDU that provides services such as recovery error indication to the upper layer protocol 24 shown in FIG. AAL-2, etc., which provide services between the destinations and related time information, provide services such as error recovery and unrecovered error to the upper layer protocol 24, and also provide the function of dividing and reassembling user information. The complex procedure of AAL-3 / 4 and communication protocol, which provides the function of delivering data of variable bit rate in connected or disconnected manner, is complicated for high speed data communication. There is an AAL-5 which provides a high speed data transfer function by simplifying the function of the above-mentioned AAL-3 / 4 which is not suitable.

Here, the interface of the signaling message between each terminal and the network is processed through the AAL-5 having a high speed data transmission function, which is one of the horizontal classification of the ATM adaptation layer 23 described above.

In addition, the ATM layer 22 controls user-to-network access and information flow, translates a virtual path identification number and a virtual channel identification number, connects to service access points, performs multiplexing and demultiplexing of cells, and physical layer 21. ) Is composed of a transport convergence sublayer and a physical medium sublayer, and performs cell separation, generation and confirmation of header error control bytes, detection of cell boundary points, and the upper layer 24 of the user plane C. Provides a function for processing service information.

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

Here, 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 protocol discriminator 31 for determining the user-to-manage call control message from other messages, and user-manganese. The call reference signal, message type signal 33, and message length 34 for detecting the call destination that transmitted the message of the interface are basically configured. According to the function of the variable length information 35 required is defined to be represented.

In practice, the user-to-many ATM call and connection control messages as described above are call establishment messages, call processing, connect, connect acknowledgment, and setup messages. There are RELWASE and RELEASE COMPLETE messages as call clearing messages and STATUS and STATUS ENQUIRY messages as miscellaneous messages.

Herein, the present invention is included in the above user-to-many ATM call and connection control message, and the other interface for the setup message and the call sent by the calling user to the network or to the called user in the network to initialize the call setup. Relates to at-party messages sent to or received from other interfaces.

On the other hand, as described above, the setup message according to the present invention, as shown in Figure 4 (a), the protocol identification signal of 1 octet, the call reference signal of 4 octets, the message format of 2 octets and It consists of a header information message consisting of a message length and a variable length information message that is variably included as necessary. The variable length information includes, for example, an AAL parameter message, a broadband transport capacity message, a broadband upper layer information message, a call party number message, and a connection. There is an identification message and the like, and each of the variable length information has the same or different respective values.

On the other hand, as described above, the ADD PARTY message related to the present invention includes a protocol determination signal of 1 octet, a call reference signal of 4 octets, and a message of 1 octet, as shown in FIG. It consists of a header information message consisting of a format and a message length of 2 octets, and a variable length information message that is variably included as necessary. Examples of the variable length information include an AAL parameter message, a broadband lower layer message, a broadband upper layer information message, and a call. There is a party number message and a called party number message. Each of the variable length information has the same or different respective values.

Meanwhile, as shown in FIG. 3, general variable length information required for each function included in the user-network ATM call and access control message and optionally included in each of the setup message and the add-party message as described above. Reference numeral 35 denotes an information identifier 51, a coding standard 52, an information element instruction 53, an information length 54, and the like, as shown in FIG. It consists of information contents 55.

In particular, the AAL parameter message included in the above-mentioned variable length information and included in the setup message and the ed party message substantially related to the present invention, as shown in FIG. 6, broadband sublayer information composed of 8-bit octets of 01011000. (Information element identifier) 61 of the AAL parameter message in the CCITT standardized coding standard 62 consisting of 2 bits of 00 and an unspecified information element instruction field consisting of 5 bits of 00000. (63), which consists of two octets, the length af AAL parameters contents (64) representing the length of the AAL parameter contents in the broadband sublayer information, and one octet including the extension bits. It consists of AAL format information 65 representing the format and various information contents 66 corresponding to each AAL format.

On the other hand, in the AAL parameter message having the form described above, the AAL format information 65 located in octet 5 is divided into four types of information having different values, as shown in FIG. That is, the AAL format information 65 is composed of AAL format -1 consisting of bits '0000001', AAL format -3/4 consisting of bits '0000011', AAL format -5 consisting of bits '0000101', and bit '0010000'. The information content 66 according to the AAL parameter format information is divided into user definitions, and is shown in FIGS. 8, 9, 10, and 11.

That is, the AAL format information 65 is AAL format -1, that is, the bit information value is '0000001', and the information content 66 is composed of 8 bit octets of '10000101', as shown in FIG. Subtype identifier 81, subtype 82, constant bit rate identifier 83 consisting of 8-bit octets of '10000110', equal bit rate 84, multiplier identifier 85 ), A multiplier 86 representing an integer representation of the multiplier value between 2 and 216-1, a clock recovery type identifier 87 consisting of an 8 bit octet of '10001000', a clock recovery type (88) an error correction identifier 89 consisting of 8 bit octets '10001001', an error correction format 90, a structured data transfer identifier consisting of 8 bit octets '10001010' ( 91), part of the structural data transfer 92, an integer representation of the number of leading octets The identifier of the file cell (partially filled cells identifier) (93), consists in part of file cell (94).

On the other hand, in the information content 66 in which the AAL format information 65 in the AAL parameter message is AAL format -1, that is, the bit information value is '0000001', the subformat 82 is the ninth. As shown in (a), if the corresponding bit value is '00000000', a blank (null / empty). If the corresponding bit value is '00000001', a voice band based on 64 kbit / s. ), If the bit value is '00000010', circuit emulation (synchronous); if the bit value is '00000011', circuit emulation (asynchronous), the corresponding bit value If '00000100' indicates high quality audio, and if the corresponding bit value is '00000100', video is shown.

Further, in the information content 66 in which the AAL format information 65 in the AAL message is AAL format -1, that is, the bit information value is '00000001', the identity bit rate 84 is shown in Fig. 9B. As shown, if the corresponding bit value is '00000001', it means 64 kbit / s, if the corresponding bit value is '00000100', it is 1544 kbit / s (DS1), and if the corresponding bit value is '00000101', 6312 kbit / s (DS2) If the bit value is '00000110', it means 32064 kbit / s. If the bit value is '00000111', it means 44736 kbit / s (DS3). If the bit value is '00001000', it is 97728 kbit / s. If it is '00010000', it is 2048 kbit / s (E1), if the bit value is '00010001', it is 8448 kbit / s (E2). If the bit value is '00010010', it is 34368 kbit / s (E3). A value of '00010011' indicates 139264 kbit / s, and a corresponding bit value of '01000000' indicates n × 64 kbit / s.

On the other hand, in the information content 66 when the AAL format information 65 in the AAL parameter message is AAL format-1, that is, the bit information value is '00000001', the clock recovery format to be detected substantially in accordance with the present invention ( 88), if the corresponding bit value is '00000000', null as shown in FIG. 9 (C); if the corresponding bit value is '00000001', SRTS (Synchronous Residual Time Stamp) is used. '00000010' indicates adaptive clock recovery.

In the information content 66 when the AAL format information 65 is AAL format -1, that is, the bit information value is '00000001', the error correction format 90 is as shown in FIG. If the corresponding bit value is '00000000', it indicates a blank, and if the corresponding bit value is '00000001', it indicates an interleaving forward error correction. Here, when the bit value of the error correction format 90 is '00000001', the code point excludes the specification of the SDT in the structural data transfer information 90 described below.

Furthermore, in the information content 66 when the AAL format information 65 is AAL format -1, that is, the bit information value is '00000001', the structured data transmission 92 is shown in Fig. 9 (e). If the bit value is '00000000', it indicates blank, and if the bit value is '00000001', it indicates structural data transmission. Here, when the bit value of the structural data transmission information 92 is '00000001', the code point excludes the use of interpolation FEC in the error correction format 90 described above.

On the other hand, if the AAL format information 65 as described above is AAL format -3/4, that is, the bit information value is '00000011', the information content 66 is a value between 1 and 65535 as shown in FIG. Received Max Common Part Convergence Sublayer (CPCS) -Service Data Unit (SDU) Size Identifier 101 consisting of octets of '10000001' indicating a 16-bit integer representation for ), A MID size identifier 103 representing an integer representation of the number of MIDs (Message Identifiers) consisting of 8 bit octets of '10000010', a MID size 104 consisting of two octets, and an 8 bit octet of '10000011' Identifier 105, mode 106 of 8 bit 1 octets, Service Specific Convergence Sublayer (SSCS) type identifier 107 of 8 bit octets of '10000100', SSCS format 108 of 1 octet of 8 bits It consists of.

In addition, in the information content of the AAL format -3/4 having the format as described above, the mode 106 information is 8 in 1 in the message mode, as shown in FIG. Bit octets, and in the streaming mode, it consists of 10 8-bit octets.

Furthermore, in the information content of the AAL format -3/4 as described above, the SSCS format 106 information is composed of eight 8-bit octets of zero when empty, as shown in FIG. 1 for data SSCS based on SSCOP (Service Specific Connection Oriented Peer-to-peer Protocol), 10 for data SSCS based on SSCOP and frame relay SSCS In the case of 100.

On the other hand, if the AAL format information 65 as described above is AAL format-5, that is, the bit information value is '0000101', the information content 66 is set to logic '10000001', as shown in FIG. Received Max CPCS-SDU Size Identifier 111, Receive Max CPCS-SDU Size 112, Mode Identifier 113 consisting of 8 bit octets of '10000011', Mode 114 of 8 bit 1 octet, '10000100 SSCS format identifier 115 consisting of 8 bit octets, and SSCS format 116 consisting of 8 bit 1 octets.

Furthermore, in the information content of the AAL format -5 having the format as described above, the mode 114 information is similar to the mode 106 information in the AAL format -3/4 described above. Is substantially the same as shown in Fig. 9), and in the information content of the AAL format -5, the SSCS format 116 information is similar to the SSCS format 108 information in the AAL format -3/4 described above. It is substantially the same as shown in (g).

In addition, if the AAL format information 65 as described above is AAL format -5, that is, the bit information value is '0010000', the information content 66 is user defined consisting of four octets, as shown in FIG. It consists of ATM Adaption Layer (AAL) parameter information.

As described above, the present invention, as shown in FIG. 8, is included when the AAL format information of the plurality of pieces of content information according to the AAL format information is AAL format-1, that is, the bit information value is '0000001'. In other words, a method for rapidly detecting a partial filed cell message indicating an integer indication of the number of preceding octets in the content information is concerned.

However, as described above, among the variable length messages required for each function, the other interface for calling and setup messages sent by the calling user to the network or to the called user in the network to initiate call setup in the Q.93B protocol. For the present invention, a method for effectively detecting, or an apparatus for realizing, a partial filed cell message indicating an integer representation of the number of leading octets in an AAL parameter message contained in an at-party message sent to or received from the other interface. There is no suggestion at all.

Thus, the present invention is a partial file representing the integer representation of the number of leading octets in AAL format -1 in the AAL parameter message included in the broadband sublayer information in the Q.93B protocol and optionally included in the setup message and the at-party message. It is an object of the present invention to provide a method for efficiently detecting the cell information.

It is another object of the present invention to effectively determine the error of the partial filed cell information indicating the integer indication of the number of leading octets in the AAL format -1 in the AAL parameter message, so that the corresponding service information can be quickly provided to the network. To provide a message detection method.

According to one aspect of the present invention for achieving the above object, the number of preceding octets in the AAL parameter message included in the setup message and the ad party message in the ATM cell provided to the corresponding terminal in the network via the transport channel in the asynchronous transmission mode, respectively. CLAIMS 1. A method for detecting partially filed cell information indicative of an integer representation for a method, the method comprising: receiving the setup message or add party message input from an information park and storing the set message or add party message at a predetermined address in memory; A first process of detecting length information of two octets for and storing the information at a predetermined address of the memory, and a counter set to a predetermined value to recognize the AAL parameter message which is variable length information following the header information of the corresponding message; Increasing the value by 1 successively A second step of determining an information identifier, a third step of detecting length information of its two octets and storing the information of the length of the second octet when the information identifier of the AAL parameter message is determined, and storing the AAL format information in the AAL parameter message. A fourth step of updating the counter value by setting the octave length of the header information located at the front end to find the corresponding octave including the fourth octave, and detecting the AAL format information from the corresponding octave obtained in the fourth step A fifth step of performing an AND operation with the corresponding octet information and any bit value stored in the memory, and for recognizing partial file information of the AAL format-1 of the next octet based on the AAL format information. A sixth step of discriminating its information identifier while continuously increasing the counter value set to a predetermined value by one; And determining the information value of the partially filed cell of the octet next to the information identifier based on the reference value preset in correspondence with the number of the preceding octets in AAL format -1, the content information obtained through the sixth process. There is provided a method for detecting a partially filed cell message in an AAL parameter message in an asynchronous transmission mode comprising a seventh step of outputting service information corresponding to a type and providing it to the network.

On the other hand, in the message detection method of the present invention as described above, the first step further comprises the step of converting the length information of the two octets in the detected setup message or the ad party message into an integer unit, the third process The method further includes converting length information of two octets of the detected AAL parameter message into an integer unit.

According to another aspect of the present invention for achieving the above object, the number of preceding octets in the AAL parameter message included in the setup message and the ad party message in the ATM cell provided to the corresponding terminal in the network via the transport channel in asynchronous transmission mode, respectively. CLAIMS 1. A method for detecting partially filed cell information indicative of an integer representation for a method, the method comprising: receiving the setup message or add party message input from an information park and storing the set message or add party message at a predetermined address in memory; A first process of detecting length information of two octets for and storing the information at a predetermined address of the memory, and a counter set to a predetermined value to recognize the AAL parameter message which is variable length information following the header information of the corresponding message; Increasing the value by 1 continuously A second step of determining an information identifier thereof, and a service for notifying occurrence of a message error when the counter value exceeds the length information value of the corresponding message by comparing the counter value with the length information value of the setup message or the ad party message. A third step of outputting information to the network and if the information identifier is determined while the counter value does not exceed the length information value of the corresponding message, detecting length information of two octets of the AAL parameter message by detecting the length information; A fourth step of storing at a predetermined address of the memory, and updating the counter value by setting the octet length of the header information located at the front end thereof to find the corresponding octet including the AAL format information in the AAL parameter message. The AAL type definition in the corresponding octave obtained in the fifth process and the fifth process A sixth step of performing an AND operation with the corresponding octet information and any bit value stored in the memory to detect the beam; the partial file of the AAL format-1 of the next octet, which is content information based on the AAL format information A seventh step of determining the information identifier while continuously increasing the counter value set to a predetermined value by one for recognizing cell information, and an octet preceding the AAL format -1, which is the content information obtained through the seventh step. Based on the predetermined reference value corresponding to the number of the information identifier, the information value of the partially filed cell of the next identifier is determined based on the information value of the partially filed cell of the next identifier. An eighth step of outputting corresponding service information and providing the same to the network; and the sub-detection detected as a result of the type determination in the eighth step Partially filed cell message in the AAL parameter message in the asynchronous transmission mode consisting of a ninth process of outputting service information for notifying occurrence of a message error if the information value of the corresponding filed cell is not included in the preset reference value and providing it to the network. A detection method is provided.

On the other hand, in the message detection method of the present invention as described above, the seventh step, if the AAL format of the next octet based on the AAL format information is not AAL format -1, the service information for notifying occurrence of a message error is outputted. It further includes the process of providing to the network.

Other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

Figure 13 shows a schematic block diagram of a hardware system for detecting partially filed cell information representing an integer indication of the number of leading octets in an AAL parameter message in accordance with the present invention.

As shown in the figure, a hardware system for partially filed cell information detection that represents an integer representation of the number of preceding octets in accordance with the present invention comprises an ATM 10a and an AAL type 5 (10a), which are not shown. Q.93B information providing unit 10 which provides information on the Q.93B protocol input through the transport channel, in particular, the setup message and the ad party message related to the present invention, and Q from this information providing unit 10. In accordance with the present invention receiving information on the .93B protocol, the detection of the partially filed cell information and also the detection of the partially filed cell information contained in the AAL format -1 variable length information in the AAL parameter message in the message A control unit 12 for outputting service information corresponding to the control unit 12 to the network, and information on the partially filed cell message in the AAL parameter message detected by the control unit 12; A storage unit 14 for storage.

In FIG. 13, the control unit 12 is an ATM cell provided from the above Q.93B information providing unit 10 at the time of the interface for communication between each terminal and the network, as shown in FIG. Protocol discrimination signal 31 for discriminating user-to-network call control message, call reference signal 32 for detecting call destination that transmitted message of user-to-network interface, message format signal 33, message length signal 34 Receive information regarding the general Q, 93B, the basic configuration for the message for the general Q, 93B, and then receives the information about the broadband sublayer AAL parameter message for the broadband sublayer information, that is, as shown in FIG. Similarly, partially filed cell information 94 representing an integer representation of the number of leading octets in the content information 66 shown in FIG. 8, added when AAL format-1 in accordance with the AAL format 65 in the AAL parameter message. ) Is detected and stored in the storage unit 14.

Therefore, the control unit 12 reads and outputs the service information corresponding to the partially filed cell information indicating the integer indication of the number of preceding octets included in the AAL parameter message of the detected broadband lower layer information and outputs it. The interface between the network and the terminal is effectively performed through the channel.

Next, the partial wild cell information included in the content information in the AAL parameter message as described above will be described in detail with reference to FIG. 14 showing a preferred embodiment of the present invention.

FIG. 14 is a flowchart illustrating a process of detecting partial file information of an integer representation of the number of preceding octets included in AAL format -1, which is content information in an AAL parameter message of broadband lower layer information, according to the present invention. Indicates.

First, as can be seen from the figure, the SETUP message and the ad-party message are transmitted to the called party through the transmission channel from the network (not shown) that receives the SETUP message or the ad-party message from the calling user. When received by the control unit 12, the control unit 12 stores the SETUP message and the ad party message in the storage unit 14 (step 200).

Next, the controller 12 determines whether the message format information located in the octet 5 of the message stored in the storage 14 is number 5 or 128, that is, whether the message format information is '00000101' or '10000000'. It is determined whether or not (step 202). The reason for checking the message format information in this step 202 is that the message format information is 2 octets for the setup message and the message format information is 1 octet for the ad party message. , Call reference, message format, and message length).

Then, as a result of the determination in step 202, if the message format information is number 5, that is, '00000101', the controller 12, as shown in FIG. 15, m [6] to m [6] from the address m [0]. ] Set dummy value a = m [7] in consideration of storage of 7 octets of header information, that is, 1 octet protocol discrimination signal, 4 octet call reference signal, and 2 octet message format information. Then, to form the setup message information of the oct unit in the integer unit (16 bits), the value of a shifted 8 times to the left (actually the result of shifting the upper octet of the setup message length information to the left 8 bits) The resulting value, i.e., the setup message length information value of 1 octet, is addressed, and stored in the address m [7] in the storage unit 14, as shown in FIG. The information is stored at the next address m [8] that follows (step 204). . Thus, the message length of the two octets for the setup message is Ls = a + m [8].

Therefore, the header information (meaning from the protocol determination signal to the message length information) included in the setup message is stored at the predetermined address in the storage unit 14 through the above-described process according to the present invention.

Then, the control unit 12 sets the counter C to 9 (step 206). Here, the reason for setting the counter C to 9 is that the message length information as described above is added to the protocol determination signal of 1 octet, the call reference signal of 4 octets, and the message format information of 2 octets, which are header information of the above-described setup message. In consideration of this, since it is detected and stored in the storage unit 14.

On the other hand, if the message format information is No. 128, i.e., '10000000', as the determination result in step 202, the control unit 12, as shown in Fig. 15, m [0] to m [ 5] up to 6 octets of header information, i.e., 1 octet protocol discrimination signal, 4 octet call reference signal, and 1 octet message format information in consideration of storing dummy value a = m [6] Set to, then shift the value of a 8 times to the left to form the ad party message information in the octet unit (16 bits) (actually the upper octet of the length information of the ad party message to the left 8). Bit shift result), and an address is given to the result value, that is, one octet of the ad party message length information value, and stored in the address m [6] in the storage unit 14 as shown in FIG. The next address followed by the length information of the next octave And stored in the m [7] (step 208). Thus, the message length of the two octets for the ad party message is Ls = a + m [7].

Therefore, the header information (meaning from the protocol determination signal to the message length information) included in the ad party message is stored at the predetermined address in the storage unit 14 through the above-described process according to the present invention.

Then, the controller 12 sets the counter C to 8 (step 210). Here, the reason for setting the counter C to 8 is that the message length information as described above, in addition to the protocol determination signal of 1 octet, the call reference signal of 4 octets, and the message format information of 1 octet, which are header information of the ad party message described above. Is taken into account since is detected and stored in the storage unit 14.

Therefore, after the message length information of the setup message or the ad party message is stored in the storage unit 14 through the above-described process, the controller 12 continuously scans the input cell information to obtain the address m [C] value. 88, i.e., the information identifier 61 is checked while incrementing the counter value C by 1 in order to check detection of 1011110 bits representing the information identifier 61 of the AAL parameter message, which is variable length information of the setup message or the add-party message. (Steps 212 and 214). These steps 212 and 214 may be substantially the process of finding an AAL parameter message in a setup message or an add party message.

Next, if the AAL parameter information identifier is detected as a result of the check in step 212, control unit 12 again determines whether the detected counter C value is greater than the total length Ls of the message (step 216).

As a result of the determination in step 216, the counter C value is not greater than Ls of the message, and the control unit 12, as shown in FIG. 6, octets 1 and 2 (information identifier 61) of the AAL parameter message. Considering the standard 62 and the information command 63), set the dummy value a = m [C + 2], and then set the AAL parameter information of the setup message or the add-party message in the octet unit (16). To form a bit, the value of a is shifted 8 times to the left (actually a result of shifting the upper octets of the length information of the AAL parameter message 8 bits to the left) and the result value, that is, the AAL parameter of 1 octet. An address is assigned to the message length information value, and stored at a predetermined address of the storage unit 14, as shown in FIG. 10, and the length information of the next octet is stored at the next address m [3] (step 218). ). Therefore, the message length of the two octets for the AAL parameter message is Ls = a + m [3].

Accordingly, the header information (meaning from the information identifier to the message length information) included in the AAL parameter message is stored at a predetermined address in the storage unit 14 through the above-described process according to the present invention.

Then, the control unit 12 considers the header information of the AAL parameter message (oct 1 to oct 4) in order to obtain the AAL format 65 information included in the oct 5 to be detected in the AAL parameter message according to the present invention. The counter C is updated to C + 4 (step 220), and then the control unit 12 performs an AND operation on m [C] and the logical value 0000000001111111 (step 222). Therefore, the information of Oct 5 is left only 7-bit AAL format (65) information except the extension bit.

Next, the control unit 12 checks whether the AAL format information of octet 5 is AAL format -1, that is, the information value is 1 as shown in FIG. If AAL format -1, the control unit 12 continuously scans the inputted cell information to obtain an address m [C] value of 139, which indicates the partially filed cell information identifier 93 of AAL format -1 in the AAL parameter message. In order to check the detection of the 10001011 bits, the partially filed cell information identifier 93 is checked while the counter value C is continuously increased by one (steps 226 and 228). These steps 226 and 228 may be substantially a process of finding a partially filed cell information identifier of the AAL format -1 according to the AAL format information of the AAL parameter message included in the setup message or the ad party message, respectively.

Then, if the partial filed cell information identifier 93 is detected as a result of the check in the step 226, the control unit 12 performs a partial file subsequent to the information of the partial filed cell information identifier 93 thus detected. M [C + 1] to detect cell 94 information (step 230), and then determine the information value of the partially filed cell 94 representing an integer representation of the number of preceding octets (step 232). . Here, the value of the partially filed cell 94 is determined substantially in the range of 1 to 47 in consideration of other information of the preceding header information.

Accordingly, the present invention detects partially filed cell information indicating an integer representation of the number of preceding octets in the AAL parameter message through the operation described above, and as a result, the user can thus efficiently detect according to the present invention. The service information corresponding to the partially filed cell information value can be provided to the corresponding network.

On the other hand, when the determination result in the step 232, the information value of the detected partial filed cell 94 is out of the above range (1-47) (step 234), the control unit 12 is a partial filed cell The service information for indicating the error of the information is output and provided to the network (step 236).

On the other hand, if the counter C value of the determination in step 216 described above is greater than Ls of the message, the process proceeds directly to step 234 described above, and as mentioned above, the control unit 12 determines that an error in the message Outputting the service information for notifying that the information has occurred and providing it to the network (step 236), and if the detected AAL format information is not AAL format-1 as a result of the determination in step 224 described above, then the process is described above. In step 236, the control unit 12 outputs service information for informing that an error of the partially filed cell message has occurred and provides it to the network (step 236).

As described above, according to the message detection method of the present invention, the corresponding terminal sends to the other interface or sends to the other interface for the setup message or the call which the calling user sends to the network or the called user sees from the network to initialize the call setup. Based on the message format information in the AAL parameter message included in each of the at-party messages received from the E-party message, it is possible to efficiently and quickly detect the partial file information indicating the integer representation of the number of leading octets in the AAL format-1 message. By providing the corresponding service information to the network, the effective message interface of the terminal and the network in real time can be realized.

Claims (25)

Detecting partial file information indicating an integer indication of the number of leading octets in the AAL parameter message included in the setup message and the ad party message in the ATM cell provided to the corresponding terminal in the network through the transport channel in the asynchronous transmission mode. A method comprising: receiving a setup message or an add party message input from an information park and storing the set message or add party message at a predetermined address in a memory, and then detecting length information of two octets for the setup message or add party message, and determining the predetermined size of the memory. A first step of storing at an address; A second step of determining an information identifier thereof while continuously increasing a counter value set to a predetermined value by 1 to recognize the AAL parameter message which is variable length information following the header information of the corresponding message; A third step of detecting the length information of the second octet and storing the information on the predetermined address of the memory when the information identifier is determined; A fourth step of updating the counter value by setting an octet length of header information located at a leading end thereof to find a corresponding octet including AAL format information in the AAL parameter message; A fifth step of performing an AND operation on the oct information and an arbitrary bit value stored in the memory to detect the AAL format information in the corresponding octum; Determining the information identifier by successively increasing the counter value set by a predetermined value by 1 so as to recognize the partial filed cell information of AAL format-1 of the next octet, which is content information based on the AAL format information. Sixth process; And judging the information value of the partially filed cell of the octet next to the information identifier based on a reference value preset in correspondence with the number of preceding octets in the AAL format-1, which is the content information obtained through the sixth process. A method for detecting a partially filed cell message in an AAL parameter message in an asynchronous transmission mode comprising a seventh step of outputting service information corresponding to an information value and providing the service information to the network. The AAL parameter message in an asynchronous transmission mode of claim 1, wherein the first step further comprises converting the detected length information of the second octet in the setup message or the ad party message into an integer unit. How to detect partially filed cell messages in a. 3. The method of claim 2, wherein the length information of the second octet is converted into an integer unit by shifting the upper octet eight times to the left. 2. The partially filed cell message detection in an AAL parameter message in an asynchronous transmission mode according to claim 1, wherein the second process sets the counter value to a value corresponding to an octal number of header information of the setup message. Way. 5. The method of claim 4, wherein the octet number of header information of the setup message is 9 octets. 2. The partially filed cell message in the AAL parameter message in an asynchronous transmission mode according to claim 1, wherein the second process sets the counter value to a value corresponding to the number of octets of header information of the ad party message. Detection method. 7. The method of claim 6, wherein the octet number of header information of the ad party message is 8 octets. The partial file of the AAL parameter message in the asynchronous transmission mode according to claim 1, wherein the third process further comprises converting length information of two octets of the detected AAL parameter message into an integer unit. Cell message detection method. 10. The method of claim 8, wherein the length information of the second octet is converted into an integer unit by shifting the upper octet eight times to the left. 2. The method of claim 1, wherein the header information octet of the AAL parameter message is 4 octets in the fourth process. The method of claim 1, wherein in the fifth step, an arbitrary bit value used for an AND operation is 0000000001111111. 2. The method of claim 1, wherein the information value of the partially filed cell has a range of 1 -47. A method for detecting partial file information in an AAL parameter message included in a setup message and an ad-party message in an ATM cell provided to a corresponding terminal in a network through a transport channel in an asynchronous transmission mode, the method being input from an information park. A first step of storing the setup message or the ad party message at a predetermined address of a memory, and then detecting and storing the length information of 2 octets for the setup message or the ad party message at a predetermined address of the memory; A second step of determining an information identifier while continuously increasing a counter value set to a predetermined value by 1 to recognize the AAL parameter message, which is variable length information following the header information of the corresponding message; Comparing the counter value with the length information value of the setup message or the ad party message, and outputting service information for notifying occurrence of a message error to the network when the counter value exceeds the length information value of the corresponding message. 3 courses; If the information identifier is determined while the counter value does not exceed the length information value of the corresponding message, detecting a length information of two octets of the AAL parameter message and storing the detected length information in a predetermined address of the memory; A fifth step of updating the counter value by setting an octet length of header information located at a leading end thereof to find a corresponding octet including AAL format information in the AAL parameter message; A sixth step of performing an AND operation on the oct information obtained in the fifth step to detect the AAL type information and the bit value stored in the memory; In order to recognize the partially filed cell information in the AAL format-1 message of the next octet which is the content information based on the AAL format information, the information identifier is determined while continuously increasing the counter value set by a predetermined value by one. The seventh process of doing; On the basis of the preset reference value corresponding to the number of octets preceding the AAL format -1, which is the content information obtained through the seventh process, the information value of the partially filed cell of the octet next to the information identifier is determined, and then the corresponding information. An eighth step of outputting service information corresponding to a value and providing the same to the network; And a ninth step of outputting service information for notifying occurrence of a message error if the information value of the partially filed cell detected as a result of the type determination in the eighth step is not included in the preset reference value. A method for detecting partially filed cell messages in AAL parameter messages in asynchronous transmission mode. The AAL parameter message in an asynchronous transmission mode of claim 13, wherein the first step further comprises converting the detected length information of the second octet in the setup message or the ad party message into an integer unit. How to detect partially filed cell messages in a. 15. The method of claim 14, wherein the length information of the second octet is converted into an integer unit by shifting the upper octet eight times to the left. 14. The partial filed cell message detection of an AAL parameter message in an asynchronous transmission mode according to claim 13, wherein the second process sets the counter value to a value corresponding to an octal number of header information of the setup message. Way. 17. The method of claim 16, wherein the octet number of header information of the setup message is 9 octets. 14. The partially filed cell message in the AAL parameter message in an asynchronous transmission mode according to claim 13, wherein the second process sets the counter value to a value corresponding to the number of octets of header information of the ad party message. Detection method. 20. The method of claim 18, wherein the octet number of header information of the ad party message is eight octets. The partial file of the AAL parameter message in the asynchronous transmission mode according to claim 13, wherein the fourth process further comprises converting length information of two octets of the detected AAL parameter message into an integer unit. Cell message detection method. 21. The method of claim 20, wherein the length information of the second octet is converted into an integer unit by shifting the upper octet eight times to the left. 14. The method of claim 13, wherein the header information octet of the AAL parameter message in the fifth step is four octets. 15. The method of claim 13, wherein the arbitrary bit value used for the AND operation in step 6 is 0000000001111111. 15. The method of claim 13, wherein the seventh step outputs service information for notifying occurrence of a message error to the network if the next octet, which is content information based on the AAL format information, is not AAL format-1. And partially processing the cell message in the AAL parameter message in an asynchronous transmission mode. 15. The method of claim 13, wherein the information value of the partially filed cell has a range of 1 to 47.