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Relationships between application layer protocols in softswitch are explored in this paper.Two notions, i.e.protocol relationship and protocol grouping, are proposed, which are not clearly defined and even not paid much attention to before.On the basis of a well known protocol relationship named protocol conversion, three novel protocol relationships including protocol collaboration relationship, protocol cooperation relationship and protocol independent relationship are presented, so that protocol relationships are classified into four types.According to the functionality and purpose of each protocol, main protocols related to softswitch are divided into five groups.As to protocol conversion in softswitch, information flow trail(IFT) is utilized to facilitate problem solving.A decision rule for protocol conversion mode is proposed to guide how to choose between direct conversion and indirect conversion.A property of protocol relationships in softswitch is induced from all kinds of service scenarios of softswitch.This property summarizes protocol relationships within each protocol group or between two specific protocol groups.A merit of protocol grouping together with classification of protocol relationship is also presented.The effort of this paper pushes the protocol engineering to go ahead.
Relationships between application layer protocols in softswitch are explored in this paper. Two notions, ieprotocol relationship and protocol grouping, are proposed, which are not clearly defined and even not paid much attention to yet. On the basis of a well known protocol relationship named protocol conversion, three novel protocol relationships including protocol collaboration relationship, protocol cooperation relationship and protocol independent relationship are presented, so that protocol relationships are classified into four types. According to functionality and purpose of each protocol, main protocols related to softswitch are divided into five groups. As to protocol conversion in softswitch, information flow trail (IFT) is utilized to facilitate problem solving. A decision rule for protocol conversion mode is proposed to guide how to choose between direct conversion and indirect conversion. A property of protocol relationships in softswitch is induced from all kinds of ser vice scenarios of softswitch.This property summarizes protocol ties within each protocol group or between two specific protocol groups. A merit of protocol grouping together with classification of protocol relationship is also presented. The effort of this paper pushes the protocol engineering to go ahead.