Abstract
When a mobile network changes its point of attachments in Cognitive Radio (CR) vehicular networks, the Mobile Router (MR) requires spectrum handoff. Network Mobility (NEMO) in CR vehicular networks is concerned with the management of this movement. In future NEMO based CR vehicular networks deployment, multiple radio access networks may coexist in the overlapping areas having different characteristics in terms of multiple attributes. The CR vehicular node may have the capability to make call for two or more types of nonsafety services such as voice, video, and best effort simultaneously. Hence, it becomes difficult for MR to select optimal network for the spectrum handoff. This can be done by performing spectrum handoff using Multiple Attributes Decision Making (MADM) methods which is the objective of the paper. The MADM methods such as grey relational analysis and cost based methods are used. The application of MADM methods provides wider and optimum choice among the available networks with quality of service. Numerical results reveal that the proposed scheme is effective for spectrum handoff decision for optimal network selection with reduced complexity in NEMO based CR vehicular networks.
Highlights
With the exponential growth in the number of vehicles on the road, there is need of extensive research to improve the spectrum efficiency for improving vehicular communications
When Mobile Router (MR) is connected with multiple radio access technologies, it is not easy for the MR to select the optimal network for the spectrum handoff decision
This paper has proposed a spectrum handoff scheme for optimal network selection in Network Mobility (NEMO) based Cognitive Radio (CR) vehicular networks using multiple attributes decision making
Summary
With the exponential growth in the number of vehicles on the road, there is need of extensive research to improve the spectrum efficiency for improving vehicular communications. When MR is connected with multiple radio access technologies, it is not easy for the MR to select the optimal network for the spectrum handoff decision. CR vehicular nodes considered are multimode type in nature which has the capability to make call for two or more types of nonsafety services such as voice, video, and best effort simultaneously. We propose a spectrum handoff scheme for optimal network selection in NEMO based CR vehicular networks using MADM methods. (iii) first approach performing spectrum handoff using MADM in NEMO based CR vehicular networks.
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