Wireless and mobility issues in IP telephony

IP telephony has seen a tremendous surge in interest in the last couple of years. Several equipment vendors, application developers and service provides are entering into this emerging market. Regional as well as international standardization organizations have been involved in developing standards in the area, while several other forums have been actively promoting the industry as a whole. However, until recently, mobility and wireless issues have not been considered in detail with the scope of IP telephony, and the focus has been on fixed IP telephony systems. In this paper, we discuss some of the issues that need to be considered when mobility and wireless transport is introduced within IP telephony.