The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;Th...The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;The research for testing methods and technology of ATM is important for us to develop ATM networks, to promote their construction, to ensure that various ATM devices provided by different providers interoperate properly and to provide excellent services for telecommunication users.\;After discussing the abstract testing method of conformance testing and the abstract description of protocol testing, the thesis puts forward a kind of abstract testing configuration for ATM testing and a kind of abstract description method for testing case.\;From the angle of application, the thesis discusses the basic rules for ATM testing. After that, the thesis points out that the ATM testing must be made from the four aspects of normal testing, conformance testing, performance testing and interoperability testing. The general testing methods, general configuration and connection for ATM testing and the selection of ATM testing items are discussed, respectively, in the four aspects.\;Combined with the characteristics of the traffics supported by ATM systems, the thesis discusses several kinds of traffic models for conducting ATM testing. On the basis of studying various traffic models, the author classifies traffic models for ATM testing as three kinds: periodic traffic models, stochastic traffic models and manual traffic models. The parameters of describing traffic models and their calculating method are discussed in the thesis. A new kind of periodic cell sequence traffic model is proposed in this thesis. The periodic cell sequence traffic model has excellent linearly descending characteristics in the cell interval. The traffic models discussed in this thesis can be applied to various ATM testing cases.\;From the point of normal testing, physical layer testing, ATM layer testing, AAL layer testing, network management testing and signaling testing, the thesis studies and normalizes actual ATM testing cases, testing methods and testing steps. Various kinds of testing cases and relative testing purposes, testing steps, testing configurations, testing connections and testing judging rules are also discussed and normalized in the paper.\;In the end, the selecting method of testing duration for bit error rate testing studied in the thesis according to the bit error rate criterion has been determined to the systems under testing. The judging method to determine bit error rate of the systems under testing is given with the results of bit error rate testing that has been conducted in the determined time duration in the past.展开更多
文摘The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;The research for testing methods and technology of ATM is important for us to develop ATM networks, to promote their construction, to ensure that various ATM devices provided by different providers interoperate properly and to provide excellent services for telecommunication users.\;After discussing the abstract testing method of conformance testing and the abstract description of protocol testing, the thesis puts forward a kind of abstract testing configuration for ATM testing and a kind of abstract description method for testing case.\;From the angle of application, the thesis discusses the basic rules for ATM testing. After that, the thesis points out that the ATM testing must be made from the four aspects of normal testing, conformance testing, performance testing and interoperability testing. The general testing methods, general configuration and connection for ATM testing and the selection of ATM testing items are discussed, respectively, in the four aspects.\;Combined with the characteristics of the traffics supported by ATM systems, the thesis discusses several kinds of traffic models for conducting ATM testing. On the basis of studying various traffic models, the author classifies traffic models for ATM testing as three kinds: periodic traffic models, stochastic traffic models and manual traffic models. The parameters of describing traffic models and their calculating method are discussed in the thesis. A new kind of periodic cell sequence traffic model is proposed in this thesis. The periodic cell sequence traffic model has excellent linearly descending characteristics in the cell interval. The traffic models discussed in this thesis can be applied to various ATM testing cases.\;From the point of normal testing, physical layer testing, ATM layer testing, AAL layer testing, network management testing and signaling testing, the thesis studies and normalizes actual ATM testing cases, testing methods and testing steps. Various kinds of testing cases and relative testing purposes, testing steps, testing configurations, testing connections and testing judging rules are also discussed and normalized in the paper.\;In the end, the selecting method of testing duration for bit error rate testing studied in the thesis according to the bit error rate criterion has been determined to the systems under testing. The judging method to determine bit error rate of the systems under testing is given with the results of bit error rate testing that has been conducted in the determined time duration in the past.
