| 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.
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