Towards Providing Adaptive Quality of Service in Mobile Ad-Hoc Networks
ABSTRACT Due to the unreliable nature of the wireless medium as well as risks of route failure (mobility), supporting quality of service (QoS) in ad hoc networks is a rather challenging task. In this paper, we propose AQuoS, an exclusive framework which provides and ensures QoS in mobile ad hoc networks (MANETs). Compared to existing work, to our knowledge, AQuoS is the only framework which assume different node capacity limits along with considering multi-hopping and carrier sensing interferences for admission control. To extend our contribution, we also developed a new approach which deals with unexpected lost of QoS guarantees. The low complexity of our scheme along with its flexibility makes it highly scalable for MANETs. Through simulations, we show that AQuoS outperforms SWAN protocol, especially when congestion arises
Article: Mobile Ad Hoc Voting[show abstract] [hide abstract]
ABSTRACT: When building mobile ad hoc network applications designed for collaboration, one must consider the impact time and location has on an individual's ability to express opinions and make decisions. This paper proposes building a distributed ad hoc voting application, which allows users to spontaneously votes on issues across a mobile network. The application will be used to study issues of human judgment and decision making within varying decision contexts.
Conference Proceeding: Determining Intra-Flow Contention along Multihop Paths in Wireless Networks.[show abstract] [hide abstract]
ABSTRACT: Admission control of flows is essential for providing quality of service in multihop wireless networks. In order to make an admission decision for a new flow, the expected bandwidth consumption of the flow must be correctly determined. Due to the shared nature of the wireless medium, nodes along a multihop path contend among themselves for access to the medium. This leads to intra-flow contention; contention between packets of the same flow being forwarded at different hops along a multihop path causing the actual bandwidth consumption of the flow to become a multiple of its single hop bandwidth requirement. Determining the amount of intra-flow contention is non-trivial since interfering nodes may not be able to communicate directly if they are outside each other's transmission range. In this paper, we propose two methods to determine the extent of intra-flow contention along multihop paths. The highlight of the proposed solutions is that carrier-sensing data is used to deduce information about carrier-sensing neighbors, and no high power transmissions are necessary. Analytical and simulation results show that our methods estimate intra-flow contention with low error, while significantly reducing overhead, energy consumption and latency as compared to previous approaches.1st International Conference on Broadband Networks (BROADNETS 2004), 25-29 October 2004, San Jose, CA, USA; 01/2004
- [show abstract] [hide abstract]
ABSTRACT: The Fleetnet project aims at the development of a wireless ad hoc network for inter-vehicle communications. We present the rationale behind the choice of an appropriate radio hardware and the use of a position-based routing approach and outline applications to exploit the Fleetnet platform. In addition, we discuss simulation of vehicle movements as a basis for protocol evaluation as well as aspects of Internet integration of Fleetnet. We state the basic problems together with the intended approach of tackling these challenges, thereby providing an overview of the Fleetnet projectProceedings of the 2nd ACM Interational Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc 2001, October 4-5, 2001, Long Beach, CA, USA; 01/2001