Adaptive Bandwidth Management in Heterogeneous, Mobile, Wireless Networks

In this project we address the management of wireless bandwidth in heterogeneous networks typified by the Warfighter Information Network (WIN) for military applications and mixed wired, wireless, and satellite networks that are being commonly deployed fora multiplicity of commercial applications. The main goal is to strike a balance between efficient use of scarce and unstable bandwidth resources and the QoS guarantees made to real-time users and for low latency/ high priority applications.Specifically, we will develop solutions that will allow such a network to provide:(a)differentiated services to real time and best effort traffic following the Diff Serv model proposed for the wired Internet(b)bandwidth allocation and, more generally,performance guarantees to accepted real time connections(c)resource aware and precedence compliant Call Admission Control to enforce guarantees(d)efficient and fair bandwidth sharing among applications in the same class;(e)enforcement of priorities acrosstraffic classes; (f)renegotiation of bandwidth and other resource when path characteristics change after connection setup;Phase I of the effort will demonstrate the feasibility of the proposed techniques in achieving the preceding objectives viasimulation of large scale heterogeneous networks that are subjected to realistic traffic and mobility patterns.The commercial marketplace for wireless applications is exploding. According to a survey from the Wireless Data and Computing Service, adivision of Strategy Analytics, the mobile e-commerce industry may earn $200 billion by 2004. At the same time ISPs are proposing networking integrated wired/wireless architectures with dramatic differences in the available bandwidth. As illustrationsof this trend, we mention Metricom type wireless metropolitan networks, which are soon expected to also include HALO (UAV type) and satellite connections will. Also, wireless extensions to the wired IP network are growing, that include cellular (UMTS);indoor wireless LANs (WaveLAN and Bluetooth); and LEO/GEO satellite links.