Abstract
In this paper, we propose three mechanisms to reduce the broadcast storm problem in wireless mesh networks based on the Named-Data Network (NDN) architecture. The goal of our mechanisms is to reduce the number of content requests forwarded by nodes and consequently, increase the network efficiency. The first proposed mechanism, called Probabilistic Interest Forwarding (PIF), randomly forwards content requests. The second mechanism, called Retransmission-Counter-based Forwarding (ReCIF), decides to forward content requests based on the number of retransmissions by adding a counter to the header of requests. The third mechanism, called ReCIF+PIF, combines the features of PIF and ReCIF to suppress content requests. We compare the performance of our mechanisms with both the NDN default forwarding mechanism and the Listen First Broadcast Later (LFBL) mechanism. Our proposals outperform the default NDN forwarding mechanism by up to 21% regarding the data delivery rate in dense networks and provide a 25% lower delivery delay than the default NDN. Our mechanisms accomplish this performance by only reducing the number of content requests forwarded by nodes. One of our mechanisms, PIF, outperforms LFBL regarding the data delivery rate and delivery delay by up to 263% and 55%, respectively, for high network contention levels.
Highlights
Wireless Mesh Networks (WMNs) are envisioned to be a solution to provide low-cost access to the Internet [1]
With Named-Data Networking (NDN), each node broadcasts an interest packet received for the first time
We conducted experiments to parametrize our mechanisms and we compared the performances of Probabilistic Interest Forwarding (PIF), Retransmission-Counter-based Interest Forwarding (ReCIF), and ReCIF+PIF with both the default NDN forwarding mechanism and Listen First Broadcast Later (LFBL)
Summary
Wireless Mesh Networks (WMNs) are envisioned to be a solution to provide low-cost access to the Internet [1]. WMNs employ a wireless backbone composed of stationary nodes to increase the connectivity compared with ad hoc networks. Mobile or not, access the Internet through one or more than one of these backbone nodes because they are usually configured as gateways. For this reason, nodes that are often in the shortest paths toward gateways forward more packets than the others do and consume more than their resources [2]. Nodes try to access the medium at each hop because WMNs are based on multihop communication. Packets that already traversed several hops can be discarded near their destination, which leads to resource waste [3]
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