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Fixed topology packet radio networks can be used where cable connection is not possible. In TDMA based broadcast schedule for these multihop networks, finding a collision free transmission schedule for every node in the network with minimum number of time slots and maximum slot usage is an NP-complete problem. Various heuristic approaches have been proposed to solve this problem. Among these, the...
Development of routing protocols for Mobile Ad hoc Networks (MANETs) has become an important field of research because of the promising applications provided by the MANETs. In a TDMA based MANET, routing algorithms should meet the QoS constraints like bandwidth in addition to finding the shortest path. Most of the existing protocols concentrate only on finding the shortest path from source to destination...
Current day Internet is vulnerable to a variety of attacks during routing between Autonomous Systems (ASes). Routing between ASes in the internet is taken care of by standard de-facto inter-domain protocol called Border Gateway Protocol (BGP). BGP generally performs the hearsay technique for propagating the route for an IP prefix. Each BGP speaker advertises the AS -PATH through UPDATE messages for...
Multicast communication in dynamic environments like grids and ad hoc networks are potentially of critical concern. As group members move in and out of the group, in order to preserve confidentiality, it becomes imperative to use cryptographic keys with rekeying mechanism each time a user enters or leaves. Therefore, in dynamic environments rekeying introduces a significant computational and communication...
Multicast communication in dynamic environments like ad hoc networks are potentially of critical concern. As group members move in and out of the group, in order to preserve confidentiality, it becomes imperative to use cryptographic keys with rekeying mechanism each time a user enters or leaves. Therefore, in dynamic environments rekeying introduces a significant computational and communication overhead...
Computational grids have the potential for solving large-scale scientific problems using heterogeneous and geographically distributed resources. However, a number of major technical hurdles must be overcome before this potential can be realized. One problem that is critical to effective utilization of computational grids is the efficient scheduling of jobs. This work addresses this problem by describing...
In wireless ad hoc networks, the performance of the media access control (MAC) protocol has significant impact on the overall network performance. In contention-based MAC protocols, nodespsila access to the shared channel is not synchronized, and they contend for the channel whenever there are packets in their buffers ready to be sent. To reduce self-contention, Fast-Forward Mechanism and Quick Exchange...
A mobile ad hoc network is a network without any infrastructure or service access points. In wireless ad hoc networks, the performance of the media access control (MAC) protocol has significant impact on the overall network performance. In contention-based MAC protocols, nodes' access to the shared channel is not synchronized, and they contend for the channel whenever there are packets in their buffers...
The grid provides mechanisms to share dynamic, heterogeneous, distributed resources spanned across multiple administrative domains. The dynamic nature of resources on computational grids raises the question of an efficient scheduling process, which mainly consists of resource discovery and resource selection. So, appropriate resource discovery and selection mechanism is an important aspect of grid...
The recent growth of multimedia group of applications is driving the need for secure multicast communication. Secure multicast communication in dynamic environments like wireless networks and grids are potentially of critical concern. As multicast group members move in and out of the group, in order to preserve confidentiality, it becomes imperative to use cryptographic keys with rekeying mechanism...
Inter-domain routing protocol routes network reachability information between autonomous systems (ASs) in the network. Network reachability information contains the details about the neighbors of the ASs and it contains messages used to maintain the connection between ASs. On one hand, given the size and the rapid growth of the Internet, any inter-domain routing protocol should satisfy basic desirable...
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