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Cooperation and directionality: A co-opdirectional MAC for wireless ad hoc networks
(2007)
Advances in cooperative communications and directional antenna design so far have taken place in parallel, if not in isolation from each other. To explore the role they may play in the next generation of wireless networks, ...
Joint optimal access point selection and channel assignment in wireless networks
(2007)
In wireless cellular networks or in other networks with single-hop communication, the fundamental access control problem pertains to access point (AP) selection and channel allocation for each user. For users in the coverage ...
Joint multiuser downlink beamforming and admission control: A semidefinite relaxation approach
(2007)
Multiuser downlink beamforming under quality of service (QoS) constraints has attracted considerable interest in recent years, because it is particularly appealing from a network operator's perspective (e.g., UMTS, 802.16e). ...
Dynamic cross-layer association in 802.11-based mesh networks
(2007)
In IEEE 802.11-based wireless mesh networks a user is associated with an access point (AP) in order to communicate and be part of the overall network. The association mechanism specified by the IEEE 802.11 standard does ...
A second-order cone deflation approach to joint multiuser downlink beamforming and admission control
(2007)
Multiuser downlink beamforming under quality of service (QoS) constraints has attracted considerable interest in recent years, because it is particularly appealing from a network operator's perspective (e.g., UMTS, 802.16e). ...
Dynamic network provisioning for time-varying traffic
(2007)
In this paper, we address the question of dynamic network provisioning for time-varying traffic rates, with the objective of maximizing the system throughput. We assume that the network is capable of providing bandwidth ...
A secure VoIP conference system: Architecture analysis and design issues
(2007)
In this paper we present the architectural design of a secure VoIP conference system for mobile devices, which is using the strong security mechanisms of the Z Real Time Transport Protocol (ZRTP). We also provide implementation ...
A trust-based exchange framework for multiple services in P2P systems
(2007)
In this paper we propose fully distributed trust-based policies for p2p systems to regulate the exchange of different type of services and discourage misbehaviour. In a system of peers with different service valuations and ...
Voice interactive personalized security protocol: Definition and security analysis
(2007)
Security is a major issue in VoIP communications over the Internet, especially in mobile environments. Voice Interactive Personalized Security (VIPSec) constitutes a method for leveraging the security for Internet ...