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http://dx.doi.org/10.7471/ikeee.2019.23.1.280

A Method for Reducing Path Recovery Overhead of Clustering-based, Cognitive Radio Ad Hoc Routing Protocol  

Jang, Jin-kyung (Dept. of Computer Engineering, Ajou University)
Lim, Ji-hun (Dept. of Computer Engineering, Ajou University)
Kim, Do-Hyung (Dept. of Computer Science, Kangwon National University)
Ko, Young-Bae (Dept. of Computer Engineering, Ajou University)
Kim, Joung-Sik (Tactical Comm. Team, C2.Comm R&D Division, Hanwha Systems)
Seo, Myung-hwan (Tactical Comm. Team, C2.Comm R&D Division, Hanwha Systems)
Publication Information
Journal of IKEEE / v.23, no.1, 2019 , pp. 280-288 More about this Journal
Abstract
In the CR-enabled MANET, routing paths can be easily destroyed due to node mobility and channel unavailability (due to the emergence of the PU of a channel), resulting in significant overhead to maintain/recover the routing path. In this paper, network caching is actively used for route maintenance, taking into account the properties of the CR. In the proposed scheme, even if a node detects that a path becomes unavailable, it does not generate control messages to establish an alternative path. Instead, the node stores the packets in its local cache and 1) waits for a certain amount of time for the PU to disappear; 2) waits for a little longer while overhearing messages from other flow; 3) after that, the node applies local route recovery process or delay tolerant forwarding strategy. According to the simulation study using the OPNET simulator, it is shown that the proposed scheme successfully reduces the amount of control messages for path recovery and the service latency for the time-sensitive traffic by 13.8% and 45.4%, respectively, compared to the existing scheme. Nevertheless, the delivery ratio of the time-insensitive traffic is improved 14.5% in the proposed scheme.
Keywords
Cognitive Radio Ad Hoc Networks; Clustering-based Routing; Path Recovery Overhead; Different Service; Caching and Overhearing;
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