Roaming

From ITUwiki

Introduction

Because providers support large numbers of users and other providers who are physically or logically nomadic, large numbers of complex bilateral and multilateral (federation) agreements exist among network operators to allow access to and use of network resources. These agreements are usually classified as automatic and manual (i.e., temporary ad hoc agreements). The unbundling of network layers and elements, as well as the increase in the number of service providers and network operators worldwide significantly complicates roaming IdM and introduces constrained time dynamics. Diverse law and regulations combined with extensive industry normative standards and practices pertain to network interoperability.