Seamless vertical handover is a key requirement in heterogeneous wireless networks where different networks are integrated. In this paper, we introduce an enhanced information server (EIS) to accelerate vertical handover procedures in IEEE 802.21 media independent handover (MIH) networks. Based on the EIS, we propose an improved vertical handover procedure in which wireless channel conditions are estimated by exploiting spatial and temporal locality at the EIS, and therefore time consuming channel scanning procedures can be skipped. Simulation results demonstrate that the proposed scheme can reduce the vertical handover latency under diverse environments.
Bibliographical noteFunding Information:
This work was supported in part by BLS project funded by Seoul Metropolitan City (Seoul R& BD Program: WR080951 ), in part by NRF grants ( 2009–0064397 and R33–2008-000–10044-0 ), and in part by ITRC program by NIPA ( NIPA-2010-C1090–1011-0004 ).
- Enhanced information server
- IEEE 802.21 MIH
- Spatial locality
- Temporal locality
- Vertical handover
ASJC Scopus subject areas
- Computer Networks and Communications