Performance evaluation of ENUM directory service design

Abstract

ENUM (tElephone NUmbering Mapping) is a protocol that brings convergence between PSTN networks and IP networks using a unique worldwide E.164 telephone number. This mechanism couples two completely different environments with E.164 number and allows users to utilize IP based application services in PSTN networks and PSTN based application services in IP networks. We propose a new way to organize and handle ENUM name servers to improve the performance of name resolution process in ENUM based application service. We have built an ENUM based network model when NAPTR (Naming Authority PoinTeR) resource record is registered and managed by area code at the initial registration step.