No abstract

No abstract

A new resource allocation scheme suitable for the high bit rate Radio LAN was developed [l]. The scheme is an adaptive one which allocates a portion of the available bandwidth only to those users who are active. The scheme is given the name Linked cluster Graph theoretic Multiple Access (LGMA). The scheme places the nodes of an ad hoc network in different groups and dynamically divides the total network capacity between the groups. In order to evaluate the performance of the scheme, the probability of having i groups sharing the total capacity should be computed. This is done by computing the event probabilities P ( M = j) which correspond to the probability of having j active nodes in the network. Computing the probabilities P ( M = j ) is a lengthy and tedious process. Thus, an approximate method for deriving the probabilities P ( M = j) has been developed. The network performance for different configurations of an ad hoc network using the LGMA scheme has been studied and the results have shown that the performance does not vary significantly for different configurations.

A malicious node in mobile ad hoc networks (MANETs) can falsify a route advertisement, overwhelming traffic without forwarding it, helps in forwarding corrupted data, and injecting of false or uncompleted information. Mapping immune system security mechanisms to networking security can powerfully contribute in securing MANETs, since both are sharing some similar features because of the distributability environment in each. In a step for providing secured and reliable broadband services, formal specification logic along with a novel Immuneinspired security framework (I2MANETs) have been introduced.The different immune components synchronized to the framework through an agent that has the ability to replicate, monitor, detect, classify, and block/isolate the corrupted packets and/or nodes in a federated domain. The framework functions as the Human Immune System in: first response, second response, adaptability, distributability, survivability and other immune features. The I2MANETs can basically installed in one node in the domain, then automatically spread to the rest of the domain.

No abstract