@conference {
	title = {Two-Level Dynamic Bandwidth Allocation for A Space-To-Ground Relay Network},
	author = {Zeng, Hui., Hadjitheodosiou, Michael., Baras, John S.},
	year = {2006},
	month = {11/2006},
	abstract = {We address issues related to efficiency, fairness, end to- end delay minimization and Quality-of-Service in order to enable a flexible access and dynamic mission operation capability in the next generation NASA space-to-ground communication infrastructure. To provide efficient and fair utilization while guaranteeing specific service requirements for different traffic classes, we propose a two-level (long-term and short-term) sharing of a slotted high data rate satellite communication link. The implemented long-term optimal bandwidth allocation provides per-user/per-flow service guarantee and gives the inputs to the next level. In our short-term bandwidth allocation with threshold regulation, a small portion of bandwidth is still assigned to all active spacecraft in advance, but most bandwidth is dynamically allocated per frame by solving an optimal timeslot scheduling problem. We finally discuss simulation results and our design optimization approach.},
	address = {San Francisco, CA},
	booktitle = {2006 IEEE Globecom Technical Conference},
	pages = {pp. 1-6}
}
@conference {
	title = {Flexible and Dynamic Communication Architecture for Lunar Exploration},
	author = {Zeng, Hui., Roy-Chowdhury, Ayan., Rentz, Nicolas., Hadjitheodosiou, Michael., Baras, John S.},
	year = {2006},
	month = {06/2006},
	abstract = {We present work related to designing a communication network for lunar exploration. We discuss the important requirements for future space missions that influence the design of this network. We list some characteristics of the network, and highlight important issues and constraint related to performance, cost, and future network evolution. We address issues related to efficiency, fairness, end-to-end delay minimization and Quality-of-Service (QoS) framework in order to enable a flexible access and dynamic mission operation. To provide optimal or near-optimal efficient utilization and fair allocation of bandwidth of the downlink channel while guaranteeing specific QoS requirements for different service classes, we propose two-level (long-term static and short-term dynamic) sharing of a slotted high data rate satellite communication link. The long-term optimal bandwidth allocation is implemented to provide per-stream/per-user QoS guarantee and give the inputs to the next level, short-term dynamic bandwidth allocation. In our time-varying short-term bandwidth allocation with threshold regulation, a small portion of bandwidth is still assigned to all active spacecrafts in advance, but most bandwidth is dynamically allocated by the requests from them, per frame, by solving an optimal timeslot scheduling problem.},
	address = {San Diego, CA},
	booktitle = {24th American Institute of Aeronautics and Astronautics},
	pages = {pp. 1-9}
}
@conference {
	title = {Flow Control and Active Queue Management for Integrated Services in an Aeronautical Satellite Network},
	author = {Shang, Yadong., Hadjitheodosiou, Michael., Baras, John S.},
	year = {2006},
	month = {06/2006},
	abstract = {The IP-based broadband aeronautical satellite network will provide numerous new applications and services for both airspace system operations and passenger communications. Application of commercial off the shelf technologies and techniques has the potential to make network operations economically and technically realizable. However the performance of data communication protocols and applications over aeronautical satellite networks is degraded dramatically. For the satellite channel, the window based flow control algorithm may cause transient congestion. The flow control mechanisms with or without explicit feedback from the congested resource are limited in performance and not effective. We propose a hierarchical scheduler for satellite gateways. Different service disciplines are used for integrated services. A Random Early Detection Flow Control (REDFC) algorithm is proposed for best-effort traffic at the satellite gateways. In REDFC, each packet is transmitted with a probability that is a function of the queue length. If the packet is not transmitted successfully, it will be retransmitted after certain time interval. We also propose a virtual parallel queue structure as a new active queue management scheme for short life and long life web traffic. The new flow control and active queue management schemes will provide better performance for integrated services in aeronautical satellite networks.},
	address = {San Diego, CA},
	booktitle = {24th American Institute of Aeronautics and Astronautics},
	pages = {pp. 1-10}
}
@conference {
	title = {Dynamic Bandwidth Allocation for a Space Relay Communications Network},
	author = {Zeng, Hui., Hadjitheodosiou, Michael., Baras, John S.},
	year = {2006},
	month = {04/2006},
	abstract = {We address issues related to efficiency, fairness, end-to-end delay minimization and Quality-of-Service framework in order to enable a flexible access and dynamic mission operation capability in the next generation NASA space-to-ground communication infrastructure. To provide optimal or near-optimal efficient utilization and fair allocation of bandwidth of the downlink channel while guaranteeing specific service requirements for different service classes, we propose two-level (long-term static and short-term dynamic) sharing of a slotted high data rate satellite communication link. The long-term optimal bandwidth allocation is implemented to provide per-stream/per-user service guarantee and give the inputs to the next level short-term dynamic bandwidth allocation. In our time-varying short-term bandwidth allocation with threshold regulation, a small portion of bandwidth is still assigned to all active spacecraft in advance but most bandwidth is dynamically allocated by the requests from them per frame by solving an optimal time slot scheduling problem.},
	address = {Charlottesville, Virginia},
	booktitle = {2006 IEEE Systems and Information Engineering Design Symposium (SIEDS06)},
	pages = {pp.75-80}
}
