Routing in delay tolerant networks poses a challenging problem compared to a conventional data network due to the uncertainty and time varying nature of network connectivity. Initial research in this area has considered algorithms based on deterministic mobility of the nodes in DTN. While the assumption of deterministic mobility can lay the groundwork for a theoretical understanding of DTN, suc...

Vehicular Ad hoc Network (VANET) is a special class of Mobile Ad hoc Network (MANET) where vehicles are considered as MANET nodes with wireless links. The key difference of VANET and MANET is the special mobility pattern and rapidly changeable topology. There has been significant interest in improving safety and traffic efficiency using VANET. The design of routing protocols in VANET is importa...

Wireless networks allow a more flexible communication model than traditional networks since the user is not limited to a fixed physical location. Unlike cellular wireless networks, ad hoc wireless networks do not have any fixed communication infrastructure. In ad hoc networks, routes are mostly multihop and network hosts communicate via packet radios. Each host moves in an arbitrary manner and ...

Predicting the location of a mobile user in the near future can be used for a large number of user-centered ubiquitous applications. This can be extended to crowdcentered applications if a large number of users is included. In this paper we present a spatio-temporal prediction approach to forecast user location in a medium-term period. Our approach is based on the hypothesis that users exhibit ...

We analyse the transmission factors shaping spatial distribution of COVID-19 infections during distinct phases pandemic’s first wave in Madrid, Spain, by fitting a regression model capturing neighbourhood effects between municipalities. Our findings highlight that such as population, mobility, and tourism were instrumental days before national lockdown. As result, already early part lockdown ph...

One of the most important issues in location-based services is tracking moving objects efficiently. To achieve this goal, an efficient protocol which updates location information in a location server is primarily needed. In fact, the performance of a location update strategy highly depends on the assumed mobility pattern. In most existing studies, however, the mobility issue has been disregarde...

In the performance evaluation of a protocol for a vehicular ad hoc network, the protocol should be tested under a realistic conditions including, representative data traffic models, and realistic movements of the mobile nodes which are the vehicles (i.e., a mobility model). This work is a comparative study between two mobility models that are used in the simulations of vehicular networks, i.e.,...

Mobility in wireless sensor networks poses unique challenges to the Medium Access Control (MAC) protocol design. Previous MAC protocols for sensor networks assume static sensor nodes and focus on energy-efficiency. In this paper, we present MMAC, a mobility-adaptive, collision-free MAC protocol for mobile sensor networks. MMAC caters for both weak mobility (e.g. topology changes, node joins and...

In the performance evaluation of a protocol for a vehicular ad hoc network, the protocol should be tested under a realistic conditions including, representative data traffic models, and realistic movements of the mobile nodes which are the vehicles (i.e., a mobility model). This work is a comparative study between two mobility models that are used in the simulations of vehicular networks, i.e.,...

Our goal is to characterize the mobility and access patterns in a IEEE802.11 infrastructure. This can be beneficial in many domains, including coverage planning, resource reservation, supporting location-dependent applications and applications with real-time constraints, and produce models for simulations. We conducted an extensive measurement study of wireless users and their association patte...