Resumo

RANGEL-LICEA, V; COTA-GUAJARDO, J.E.; GOMEZ-CASTELLANOS, J  e  REYES-GARCIA, J. Design of handoff procedures for broadband wireless access IEEE 802.16 based networks. Ing. invest. y tecnol. [online]. 2008, vol.9, n.1, pp.17-29. ISSN 2594-0732.

Abstract IEEE 802.16 is a protocol for fixed broad band wire less access that is currently trying to add mobility among mobile users in the standard. However, mobility adds some technical barriers that should be solved first, this is the case of HO "handoff" (change of connection between two base stations "BS" by a mobile user). In this paper, the problem of HO in IEEE 802.16 is approached try ing to maintain the quality of service (QoS) of mobile users. A mechanism for changing connection during HO is pre sented. A simulation model based on OPNET MODELER1 was developed to evaluate the performance of the proposed HO mechanism. Finally, this paper demonstrates that it is possible to implement a seam less HO mech a nism over IEEE 802.16 even for users with de manding applications such as voice over IP.

Palavras-chave : Handoff; IEEE 802.16; WiMax; BWA; VoIP; QoS.