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Load balancing in multi-beam satellite systems
(2004)
We propose an approach to optimize resource sharing and in a multi-beam broadband satellite system that supports both unicast and multicast flows. We show that in this architecture, the load on every spot-beam queue could ...
A Framework for Cross-layer Design of Energy-efficient Communication with QoS Provisioning in Multi-hop Wireless Networks
(2004)
Efficient use of energy while providing an adequate level of connection to individual sessions is of paramount importance in multi-hop wireless networks. Energy efficiency and connection quality depend on mechanisms that ...
Multicast-aware Power Allocation in Multiple Spot-Beam Satellite Communication Systems
(2004)
We address the problem of optimizing resource sharing and flow control in a multiple spot-beam broadband satellite system that supports both unicast and multicast flows. Satellite communication systems, with their wide-area ...
Stability of rate control system with time-varying communication delays
(2004)
We adopt the optimization framework for the rate allocation problem proposed by Kelly and investigate the stability of the system with arbitrary communication delays between network elements with time-varying queue dynamics. ...
Detection and Prevention of MAC Layer Misbehavior for Ad Hoc Networks
(2004)
It is known that 802.11 is not resilient to selfish behavior and denial of service (DoS) attacks targeting the MAC layer. In this study, we assess the performance of the CSMA/CA scheme and investigate its efficiency with ...
RATE OF DEGRADATION OF CENTRALIZED OPTIMIZATION SOLUTIONS AND ITS APPLICATION TO HIGH PERFORMANCE DOMAIN FORMATION IN AD HOC NETWORKS
(2004)
Future military systems such a FCS require a robust and flexible network that supports thousands of ad hoc nodes; therefore, we must ensure the scalability of networking protocols (e.g., rout-ing, security and QoS). The ...
Security Issues in Hybrid Satellite Networks
(2004)
Satellites are expected to play an increasingly important role in providing broadband Internet services over long distances in an efficient manner. Future networks will be hybrid in nature - having terrestrial nodes ...
Comparing locality of reference - Some folk theorems for the miss rates and the output of caches
(2004)
The performance of demand-driven caching is known to depend on the locality of reference exhibited by the stream of requests made to the cache. In spite of numerous efforts, no consensus has been reached on how to formalize ...
An Analysis of Delay-Constrained Opportunistic Scheduling for Cellular Wireless Systems
(2004)
Base station schedulers in 3G and evolving 4G cellular systems use knowledge of the time-varying channel conditions of mobile users to exploit the multiuser diversity inherent in wireless networks. Although such opportunistic ...
Key Management for Secure Multicast in Hybrid Satellite Networks
(2004)
This paper proposes a design for key management for secure multicast in hybrid satellite networks. Communication satellites offer an efficient way to extend IP multicast services for groups in wide-area networks. In order ...