This paper attempts to address the scatternet problem in Bluetooth through a comprehensive approa... more This paper attempts to address the scatternet problem in Bluetooth through a comprehensive approach. We propose a new decentralized ring structure to combat the formation of traffic bottlenecks. The adopted construction protocol ensures flexibility of node selection and a good level of fault tolerance. The routing protocol combines both simplicity and robustness by taking advantage of the ring structure and relying on the collective memory of piconets to make forwarding and discarding decisions. The intra- and inter-piconet scheduling algorithm, called ROM adaptive scheduling (RAS), dynamically allocates time slots and is responsive to the varying workload conditions. We demonstrate, through analysis and simulations, that the various components of ROM yield a system that has good performance in terms of throughput, latency, delivery, and link utilization.
This chapter describes the legal and contractual considerations for organisations wishing to use ... more This chapter describes the legal and contractual considerations for organisations wishing to use ICT in their virtual organisation. The chapter describes a number of legal and contractual conditions, (mainly contracts), that must be met to enable legal and contractually valid transactions amongst the VO participants. These contracts and how to achieve them using software tools is described. These tools enable organisations to send electronic transactions in a secure and legally valid manner using technology that is readily available and easy to use. How this can be achieved is described. Bringing all this information together the chapter concludes with a small case study where a description of how these tools have been used in the VO environment is given.
This paper attempts to address the scatternet problem in Bluetooth through a comprehensive approa... more This paper attempts to address the scatternet problem in Bluetooth through a comprehensive approach. We propose a new decentralized ring structure to combat the formation of traffic bottlenecks. The adopted construction protocol ensures flexibility of node selection and a good level of fault tolerance. The routing protocol combines both simplicity and robustness by taking advantage of the ring structure and relying on the collective memory of piconets to make forwarding and discarding decisions. The intra- and inter-piconet scheduling algorithm, called ROM adaptive scheduling (RAS), dynamically allocates time slots and is responsive to the varying workload conditions. We demonstrate, through analysis and simulations, that the various components of ROM yield a system that has good performance in terms of throughput, latency, delivery, and link utilization.
This chapter describes the legal and contractual considerations for organisations wishing to use ... more This chapter describes the legal and contractual considerations for organisations wishing to use ICT in their virtual organisation. The chapter describes a number of legal and contractual conditions, (mainly contracts), that must be met to enable legal and contractually valid transactions amongst the VO participants. These contracts and how to achieve them using software tools is described. These tools enable organisations to send electronic transactions in a secure and legally valid manner using technology that is readily available and easy to use. How this can be achieved is described. Bringing all this information together the chapter concludes with a small case study where a description of how these tools have been used in the VO environment is given.
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Papers by Tarek Hasan