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Modular-based channel hopping (CH) rendezvous algorithms can provide guaranteed rendezvous for Cognitive Radio Networks (CRNs) without time synchronization or Common Control Channels (i.e., blind rendezvous). Recently, the Enhanced Jump-Stay (EJS) scheme [13] has been proposed that decreases the Maximum Time To Rendezvous (MTTR) and the Expected Time To Rendezvous (ETTR) for users with a different...
Recently, blind rendezvous algorithms have been proposed for cognitive radio networks due to the limitations of centralized servers or common control channels. However, these algorithms are vulnerable to our Channel Detecting Jamming Attacks (CDJAs) where a jammer computes and jams their channel hopping sequences by utilizing the properties of each rendezvous scheme. We have demonstrated that CDJAs,...
Recently many channel hopping algorithms have been studied to guarantee rendezvous for Cognitive Radio Networks (CRNs). These algorithms propose rendezvous methods without using common control channels (CCCs) to avoid the limitations such as single point of failure, low scalability, and jamming attacks. In particular, the Jump-Stay based channel hopping rendezvous (JSR) algorithms provide guaranteed...
Efficient utilization of wireless bandwidth is a critical, if not the key, component of the wireless network architectures that balance availability and access. Cognitive Radio Networks (CRNs) are an important part of the solution to this problem. Common control channels (CCCs) for rendezvous in CRNs have limitations such as single point of failure, low scalability, and susceptibility to jamming attacks...
Researchers have recently studied random spread spectrum techniques to protect the wireless broadcast communications from reactive jamming attacks in traditional Direct Sequence Spread Spectrum (DSSS) networks. They proposed mechanisms to eliminate the pre-shared key vulnerability by generating different code sequences for each message using random seeds and disclosing the seeds at the end of the...
Recently Quorum-based frequency hopping schemes have been studied to increase rendezvous probabilities and to provide fast key establishment techniques in RF communication under jamming attacks. However, these schemes are still vulnerable to sophisticated jamming attacks in which a jammer has the capability of listening and jamming multiple frequencies. In this paper, we present a sophisticated jamming...
Delay Tolerant Wireless Sensor Networks (DTWSNs) are sensor networks where continuous connectivity between the sensor nodes and their final destinations (e.g., the base station) cannot be guaranteed. Storage constraints are particularly a concern in DTWSNs, since each node may have to store sensed data for a long period of time due to intermittent communication while continuously collecting data....
A wireless sensor network is expected to consist of a potentially large number of low-cost, low-power, and multi-functional sensor nodes that communicate over short distances through wireless links. Due to their potential to provide fine-grained sensing and actuation at a reasonable cost, wireless sensor networks are considered ideal candidates for a wide range of applications, such as industry monitoring,...
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