Harmony – A Framework for Providing Quality of Service in Wireless Mobile Computing Environment

Lele, Abhijit; Nandy, S. K.

doi:10.1007/978-3-540-46642-0_44

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…A similar scheme of mapping applications from the MUs to the CSs has been investigated by Othman et al 19 from the perspective of reducing power consumption. A load-balancing scheme to improve system availability is discussed elsewhere 7 .…”

Section: Related Workmentioning

confidence: 99%

“…However, a point of departure from load balancing in classical distributed computing systems is that in the mobile multimedia systems we consider, tasks have another type of requirements-some minimal amount of compute capacity on a CS for the complete call duration rather than some total amount of service time without any deadline. This paper is a detailed investigation of the HARMONY architecture proposed in 7 . The rest of the paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

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Harmony — An Architecture for Providing Quality of Service in Mobile Computing Environments

2000

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Future mobile multimedia systems will have wearable computing devices as their front ends, supported by database servers, I/O servers, and compute servers over a backbone network. Multimedia applications on such systems are demanding in terms of network and compute resources, and have stringent Quality of Service (QoS) requirements. Providing QoS has two aspects. On the one hand, the QoS requirements for the relevant resources have to be defined and suitable policies for meeting these requirements have to be devised and analyzed. On the other hand, the architecture of the system components and the mechanisms enabling the implementation of these policies have to be designed. In this paper we propose an architecture called HARMONY for providing QoS in mobile computing environments. The HARMONY architecture is a layered architecture that provides mechanisms for the management of network and compute resources, in particular for call admission control taking into account the simultaneous requests for both types of resources by the mobile units. It also provides a mechanism for mobility management of mobile units as they move from one cell to another in a mobile computing environment. The network resources are reserved based on the Entropy model. In order to provide compute guarantees, we provide a novel scheme for off-loading tasks from the mobile units to the compute servers in the backbone network. We propose a load-balancing scheme to minimize the call blocking probability due to lack of compute resources, which redistributes the total load in the system across all compute servers so that these are equally loaded. Through a quantitative analysis of the HARMONY architecture we establish its effectiveness in providing quality of service in mobile computing environments.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Harmony — An Architecture for Providing Quality of Service in Mobile Computing Environments

2000

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“…The HARMONY architecture [2] provides mechanisms for management of network and compute resources in a mobile computing environment. In HARMONY network resources are reserved based on the Entropy Model [7], and compute guarantees are provided by off-loading tasks from the mobile units to compute servers in the backbone network.…”

Section: Introductionmentioning

confidence: 99%

“…A mobile multimedia system under investigation in which we are considering off-loading applications to the backbone, is the Ubiquitous Communications project at the Delft University of Technology, The Netherlands [ 11. The HARMONY architecture proposed in [2] provides QoS in an MCE and helps maintain harmony between communication and compute resources. In this paper we carry out a design space exploration of the Dept.…”

Section: Introductionmentioning

confidence: 99%

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Design space exploration for providing QoS within the HARMONY framework

Lele

Nandy²,

Epema³

2000 IEEE International Conference on Multimedia and Expo. ICME2000. Proceedings. Latest Advances in the Fast Changing World Of

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The HARMONY architecture [2] provides mechanisms for management of network and compute resources in a mobile computing environment. In HARMONY network resources are reserved based on the Entropy Model [7], and compute guarantees are provided by off-loading tasks from the mobile units to compute servers in the backbone network. A load-balancing scheme redistributes loads across all compute servers so that these are equally loaded. This paper carries out a design space exploration of the HARMONY architecture to determine parameter bounds within which quality of service can be provided.

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Architecture of a reconfigurable low power gigabit ATM switch

Lele

Nandy²

VLSI Design 2001. Fourteenth International Conference on VLSI Design

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Multistage switch interconnects like banyan switches are preferred in high speed networks for their cascadable structure and suitability for V U 1 implementation. However most of these switch implementations are monolithic in nature and do not provide flexibility of dynamic re-routing of cells from active ports through idle ports. In this paper we take a critical look at a basic 8 x 8 benes switch from the perspective of identifying smaller blocks which can be pipelined in space and temporally multiplexed to exploit hardware reuse. A topological analysis of a 8 x 8 benes switch is carried out to identifr mutually exclusive path sets that can be overlayed for hardware reuse. Based on this analysis we arrive at a basic building block called X-Structure, using which a 8 x 8 switch is constructed. The X-structure supports dynamic re-routing of cells and power down mode. A communication controller is designed using the the X-Structure based ATM switch at its core. A pevormance evaluation of the switch indicates a power saving of 66.66% due to hardware reuse, an 18.6% increase in hardware utilization and an aggregate throughput of 2.66 Gbps for a 8 x 8 switch.

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Harmony – A Framework for Providing Quality of Service in Wireless Mobile Computing Environment

Cited by 3 publications

References 2 publications

Harmony — An Architecture for Providing Quality of Service in Mobile Computing Environments

Harmony — An Architecture for Providing Quality of Service in Mobile Computing Environments

Design space exploration for providing QoS within the HARMONY framework

Architecture of a reconfigurable low power gigabit ATM switch

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