• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    PURPOSE: A testing method using a virtual remote SSCOP(Service Specific Connection Oriented Protocol) in an ATM(Asynchronous Transfer Mode) system is provided to perform remote ATM system functions by the virtual remote SSCOP, that is a software verification tool, so as to test message encoding and decoding of an SSCOP layer even in a state that interworking with the remote ATM system is not formed. CONSTITUTION: A virtual remote SSCOP(30) holding message discriminating capability is initialized, wherein the virtual remote SSCOP(30) encodes a response message for a message delivered from an SSCOP layer(23) of an ATM system and delivers the encoded message to the SSCOP layer(23). An MTP(Message Transfer Part) layer(21) generates a signaling link activation message according to a signaling link activation command and delivers the generated message to the SSCOP layer(23) through an SSCF(Service Specific Coordination Function) layer(22). The SSCOP layer(22) decodes the signaling link activation message to check a type and padding length, and sets a message loop flag to deliver the message to an ATM layer(25) through a CPCS(Service Part Convergence Sublayer) layer(24). The ATM layer(25) analyzes the signaling link activation message, if the message loop flag is set, to loop back the signaling link activation message and deliver the message to the SSCOP layer(23) through the CPCS layer(24). The SSCOP layer(23) delivers the looped-back signaling link activation message to the virtual remote SSCOP(30), and receives a signaling link activation response message appropriate for a message type, and delivers the response message to the MTP layer(21) through the SSCF layer(22) to activate the signaling link.
    公开号:KR20030034873A
    申请号:KR1020010066665
    申请日:2001-10-29
    公开日:2003-05-09
    发明作者:최용진
    申请人:엘지전자 주식회사；
    IPC主号:
    专利说明:

    Test Method Using Virtual Remote System In ATM System in ATM System
    [8] The present invention relates to a Service Specific Connection Oriented Protocol (SSCOP) layer of an Asynchronous Transfer Mode (ATM) system. In particular, the present invention relates to a system capable of activating a signal link by rotating its own loop and performing a call processing test without a large ATM system. The present invention relates to a test method using a virtual power service SSCOP (Service Specific Connection Oriented Protocol) in an ATM system.
    [9] In general, in order to smoothly communicate data between arbitrary Asynchronous Transfer Mode (ATM) systems, ATM connection setup and signaling control are required, and such signal control is not interworked between devices when attempting communication between devices. When it occurs, it is difficult to find out which device has an error, so it must be thoroughly tested in development. However, there is a limit in terms of item mounting on a real board, and it is difficult to proactively cope with a situation when it occurs.
    [10] Meanwhile, the signaling protocol stack of the ATM system includes a message transfer part (MTP) layer that performs message routing, distribution, and discrimination functions, signal traffic, signal link, and signal path management functions, as shown in FIG. A Service Specific Coordination Function (SSCF) layer that is responsible for the coordination of connection control, a Service Specific Connection Oriented Protocol (SSCOP) layer that performs connection control for establishing and releasing connection and stable communication, Service Part Convergence Sublayer (CPCS) layer that transmits service data unit, routing, header error control and ATM cell configuration using general flow control and VPI / Virtual Path Identifier / Virtual Channel Identifier It consists of an ATM layer that performs the functions, where the SSCF layer, the SSCOP layer, and the CPCS layer are each ATM adaptation layers. It includes a task for performing a function.
    [11] In addition, in order to test the SSCOP layer implemented in such an ATM system, the developer had to test in conjunction with a large-scale ATM system (or test equipment) composed of the same signal protocol stack as the ATM system described above. There was a problem that it was impossible to test during development.
    [12] In addition, since it was impossible to test during the software development of the SSCOP layer, after the development was completed, it had to be mounted and tested on the actual hardware, which makes it difficult to proactively cope with an error situation and also does not work with the actual ATM system. There was a problem that the overall development period was long because the call processing test could not be performed.
    [13] SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to implement a virtual power SSCOP, which is a software verification tool, to perform the power ATM system function. To test the decoding.
    [14] In addition, another object of the present invention, by activating the signal link through the virtual power SSCOP implemented in software, it is possible to perform the corresponding SSCOP layer test even during the development, and furthermore can only actively cope with the occurrence of an error situation Rather, it allows for call processing testing to shorten the overall development period.
    [1] 1 illustrates a signal protocol stack of a typical ATM system.
    [2] Figure 2 is a schematic system configuration for implementing a test method using a virtual power SSCOP in the ATM system according to the present invention.
    [3] Explanation of symbols on the main parts of the drawings
    [4] 10: operator terminal 21: MTP layer
    [5] 22: SSCF layer 23: SSCOP layer
    [6] 24: CPCS layer 25: ATM layer
    [7] 30: virtual power SSCOP
    [15] A feature of the present invention for achieving the above object is the process of initializing a virtual power station SSCOP having a message discrimination capability to encode a response message for the message delivered from the SSCOP layer of the ATM system and deliver it to the SSCOP layer; ; Generating a signal link activation message in the MTP layer according to the signal link activation command and delivering the signal link activation message to the SSCOP layer through the SSCF layer; Decoding a signal link activity message in the SSCOP layer to check a type and a padding length, and setting a message loop flag to deliver the message loop flag to an ATM layer through a CPCS layer; Analyzing the signal link activity message received from the ATM layer and looping back the signal link activity message to the SSCOP layer through a CPCS layer when it is determined that the message loop flag is set; Activating a signal link by forwarding the signal link activation message looped back in the SSCOP layer to a virtual power station SSCOP, receiving a signal link activation response message corresponding to a message type, and passing the signal link activation response message to the MTP layer through the SSCF layer. In the AMT system to provide a test method using the virtual power SOS COPE.
    [16] The step of activating a signal link by receiving a signal link activation response message in the SSCOP layer may include: storing a sequence number in a local DB after decoding a signal link activation message transmitted from an SSCOP layer in a virtual power station SSCOP; Encoding a protocol data unit corresponding to the message type received from the SSCOP layer to generate a signal link activity response message, and assigning a sequence number to the SSCOP layer; Decoding the signal link activation response message received from the virtual power station SSCOP in the SSCOP layer, storing the sequence number and the padding check information in the local DB, and then transmitting the signal link activation response message to the MTP layer through the SSCF layer to activate the signal link; It features.
    [17] In addition, in the above-described AMT system, the test method using the virtual power PS SOP, loops back the signal link activation message at the ATM layer to activate the signal link through the virtual power SSCOP, and then performs the processing test through the activated signal link. It characterized in that it further comprises the process of performing.
    [18] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    [19] The SSCOP layer implemented in the ATM system according to the present invention makes the signal link active as if there is no ATM system, and loops the message by itself so that the message of the SSCOP layer can be looped. In addition to testing the encoding and decoding, it is possible to perform a call processing test. The system configuration according to the present invention for the SSCOP layer and call processing test is shown in FIG. Likewise, the general signal protocol stack includes a virtual power SSCOP 30 which is a virtual power emulator capable of performing the functions of the power ATM system in cooperation with the SSCOP layer.
    [20] At this time, the virtual power SSCOP (30) has a message discrimination capability to perform a function of encoding a response message of the type (type) corresponding to the request (Request) message (Tool) software that performs a function to deliver to the upper layer (Tool) ), The same effect as linking and interworking the message encoding and decoding of the SSCOP layer 23 with the counter ATM system.
    [21] In addition, in FIG. 2, the operator terminal 10 issues a Man Machine Command (MMC) command for making a signal link active to the MTP layer, and performs a message loop flag to perform an SSCOP layer test through the virtual power station SSCOP 30. Set the.
    [22] Meanwhile, the SSCOP layer test operation using the virtual power SSCOP in the above-described ATM system will be described as follows.
    [23] First, the virtual power station SSCOP 30 to be interworked with the SSCOP layer 23 in the ATM system is initialized, and then the SSCOP layer test is performed while instructing the signal link activation from the operator terminal 10 to the MTP layer 21. In order to set the message loop flag determined by the SSCOP layer 23 and the ATM layer 25, the MTP layer 21 generates a Begin message, that is, a signal link activation message, called 'Signal link activation'. To the lower SSCF layer 22.
    [24] Accordingly, the SSCF layer 22 sets an IN service flag (INS), a local processor outage (LPO), a management provisioning state (MPS), and a user provisioning state (UPS) for a signal link activation message. Parameter) values (Alignment, Alignment Not Successful, Congestion ceased, Congestion Detected, In Service, Local Release, Out Of Service, PDU Transmitted, Protocol Error, Remote Release, SSCOP Recover, SSCOP User-to-User Information, UNITDATA Received) After setting according to each, it is delivered to the SSCOP layer 23.
    [25] Then, the SSCOP layer 230 decodes the signal link activity message transmitted from the SSCF layer 22 to check the type and padding length, and state variable information (N (S), N (PS)). , N (R), N (MR), SSCOP-UU, Source (s) bit, N (SQ)) and the like are stored in a local DB (Data Base) and then under the control of the operator terminal 10 The message loop flag is set in the header area to be delivered to the CPCS layer 24, and the CPCS layer 24 searches for the VPI / VCI value corresponding to the signal link to be activated currently, and receives the signal received from the SSCOP layer 23. It is added to the header area of the link activation message and then transferred to the lower ATM layer 25.
    [26] At this time, the ATM layer 25 analyzes the header area of the signal link activation message received from the CPCS layer 24 and determines that the message loop flag is set, the signal link activation message is sent to the CPCS layer 24 as it is. It loops back to enable the signal link activation through the virtual power SSCOP 30 to perform a test on the SSCOP layer 23 without transmitting the signal link activation message to the actual power ATM system. to be.
    [27] In addition, the signal link activation message looped back to the CPCS layer 24 by the ATM layer 25 is transferred to the SSCOP layer 23 without message conversion since the CPCS layer 24 does not perform a message determination function. 23) performs a message discrimination function, so if it is determined that the message loop flag of the header area is set by decoding the signal link active message looped back by the ATM layer 25 and delivered through the CPCS layer 24, The signal link activation message is delivered to the virtual power SSCOP 30.
    [28] Then, since the virtual power SSCOP 30 performs a message determination function, after decoding the signal link activation message transmitted from the SSCOP layer 23, the sequence number is stored in the local DB, and then the actual power of the ATM system is decoded. It performs the same function as the SSCOP layer.
    [29] That is, the virtual power SSCOP 30 is a message type (for example, start (BGN), start response (BGAK), start rejection (BGREJ), end (END), end response (ENDAK) received from the SSCOP layer 23 (Signal acknowledgment message), which is a response message by encoding protocol data units corresponding to (RS), release (RSAK), release response (RSAK), error (ER), error response (ERAK, etc.). After generating C, a sequence number is assigned to the SSCOP layer 230.
    [30] Accordingly, since the SSCOP layer 23 recognizes the signal link activity response message received from the virtual power SSCOP 30 as a message received from the actual power ATM system, the SSCOP layer 23 decodes the corresponding message and stores the sequence number and padding check information. After storing in the DB, the data is transmitted to the SSCF layer 22, and the SSCF layer 22 checks the flag and key parameter values of the signal link activity response message received from the SSCOP layer 23, and then delivers them to the MTP layer 21. Thus, the corresponding signal link activation procedure is completed.
    [31] In addition, the operator terminal 10 can confirm the result of the message encoding and decoding test of the SSCOP layer 23 by confirming the result of the signal link activation commanded by the operator, and further, the signal link can be activated accordingly. The call processing test of the ATM system can be performed.
    [32] In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.
    [33] As described above, the present invention implements the virtual power SSCOP, a software verification tool, to perform the power ATM system function, and activates the signal link through the virtual power SSCOP implemented in software without interworking with the actual power ATM system. It is possible to test the message encoding and decoding of the layer.
    [34] In addition, the present invention by enabling the signal link through the virtual power SSCOP implemented in software, it is possible to perform the corresponding SSCOP layer test during the development, thereby not only actively dealing with the error situation, but also call processing Testing can be done to shorten the overall development period.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] Initializing a virtual power station SSCOP having a message discrimination capability of encoding a response message to a message transmitted from an SSCOP layer of an ATM system and delivering the response message to the SSCOP layer;
    Generating a signal link activation message in the MTP layer according to the signal link activation command and delivering the signal link activation message to the SSCOP layer through the SSCF layer;
    Decoding a signal link activity message in the SSCOP layer to check a type and a padding length, and setting a message loop flag to deliver the message loop flag to an ATM layer through a CPCS layer;
    Analyzing the signal link activity message received from the ATM layer and looping back the signal link activity message to the SSCOP layer through a CPCS layer when it is determined that the message loop flag is set;
    Activating a signal link by forwarding the signal link activation message looped back in the SSCOP layer to a virtual power station SSCOP, receiving a signal link activation response message corresponding to a message type, and passing the signal link activation response message to the MTP layer through the SSCF layer. Test method using the virtual power SOS CPM in the AMT system, characterized in that.
    [2" claim-type="Currently amended] The method of claim 1,
    The step of activating the signal link in response to the signal link activation response message in the SSCOP layer may include: storing a sequence number in a local DB after decoding the signal link activation message transmitted from the SSCOP layer in the virtual power SSCOP;
    Encoding a protocol data unit corresponding to the message type received from the SSCOP layer to generate a signal link activity response message, and assigning a sequence number to the SSCOP layer;
    Decoding the signal link activation response message received from the virtual power station SSCOP in the SSCOP layer, storing the sequence number and the padding check information in the local DB, and then transmitting the signal link activation response message to the MTP layer through the SSCF layer to activate the signal link; Test method using the virtual game SOS CPM in the AMT system.
    [3" claim-type="Currently amended] The method of claim 1,
    And performing a process test through the activated signal link after looping back the signal link activation message at an ATM layer to activate a signal link through a virtual power station SSCOP. Test method using C.O.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-10-29|Application filed by 엘지전자 주식회사
    2001-10-29|Priority to KR1020010066665A
    2003-05-09|Publication of KR20030034873A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020010066665A|KR20030034873A|2001-10-29|2001-10-29|Test Method Using Virtual Remote System In ATM System|
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