In an IEEE 802.11 Infrastructure network, as the mobile node is moving from one access point to a... more In an IEEE 802.11 Infrastructure network, as the mobile node is moving from one access point to another, the resource allocation and smooth hand off may be a problem. If some reliable prediction is done on mobile node's next move, then resources can be allocated optimally as the mobile node moves around. This would increase the performance throughput of wireless network. We plan to investigate on a hybrid mobility prediction scheme that uses location tracking and data mining to predict the future path of the mobile node. We also propose a secure version of the same scheme. Through simulation and analysis, we present the prediction accuracy of our proposal.
2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000
Rate-based congestion control is effective and simple for traffic management in ATM networks. The... more Rate-based congestion control is effective and simple for traffic management in ATM networks. The enhanced proportional rate control algorithm (EPRCA) is one of the leading single factor rate-based congestion control protocols adopted by the ATM Forum as standard for the available bit rate (ABR) service in ATM networks. In this paper, we study and analyze the performance of EPRCA in terms of its network throughput and cell loss at no congestion state, mild congestion state and severe congestion state respectively. The paper also proposes a new three-factor rate based congestion control scheme using both EFCI and ER marking to achieve better network throughput at no congestion state and lower cell loss at severe congestion state. Further, we also demonstrate through our software simulation that the new scheme with three-factor congestion detection can achieve better network performance than those of a single factor one
2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000
Prediction plays a key role in almost all walks of life. Therefore, a new prediction-based method... more Prediction plays a key role in almost all walks of life. Therefore, a new prediction-based method, known as Kalman congestion avoidance (KACA) scheme is presented for traffic and congestion management in asynchronous transfer mode (ATM) networks. Also, an effort has been made to compare two different congestion avoidance schemes for ATM networks with the KACA scheme, such as Ohio State
The eBario project has won the eAsia Award and the Mondialogo Engineering Award in 2004 and 2005 ... more The eBario project has won the eAsia Award and the Mondialogo Engineering Award in 2004 and 2005 respectively for it's successful implementation of an Information and Telecommunications Technology Center (ICT) and solar renewable energy-incentive rural community project ...
WiFi is a cost effective technology of choice for network extension in the rural areas. The telec... more WiFi is a cost effective technology of choice for network extension in the rural areas. The telecentre network can reach further to the nearby villages within 10km radius by the use of long range WiFi relay points. The challenges encountered will be the self-sustainability of the network. It should be highly energy efficient and to be powered by the very
This paper describes a rural ICT (Information and Communication Technology) project in the most r... more This paper describes a rural ICT (Information and Communication Technology) project in the most remote areas of Sarawak, the Bario and Long Bedian. In the absent of both regular power supply and basic telecommunication infrastructure, the e-Bario and the e-Bedian projects overcome the challenges in providing the community and the schools with Internet connectivity. The telecommunication infrastructure implemented in the project is also discussed which include the use of VSAT(Very Small Aperture Terminal), call routing and wireless technology.
ABSTRACT The paper reviews five important scheduling rules and observes that their prioritization... more ABSTRACT The paper reviews five important scheduling rules and observes that their prioritization weights correspond to marginal utility functions and each of them can therefore be regarded as a gradient-based scheduling and resource allocation algorithm. The MSR and PF rules were found to be channel-aware only schedulers thus making them unable to provide QoS for different applications and users in spite of their high throughput. The M-LWDF, EXP and MDU on the other hand, in addition to being throughput optimal, can provide some amount of QoS differentiation and therefore can be classified as both queue-and channel-aware scheduling rules. All except the MSR were found to provide some amount of acceptable tradeoff between fairness and throughput. Choices are therefore available for diverse scheduling rules which promise support of a wide range of multimedia applications with heterogeneous QoS requirements. Terms— OFDMA, scheduling rules, resource allocation, utility functions.
Abstract The Malaysian government, through many initiatives, has seriously looked into reducing a... more Abstract The Malaysian government, through many initiatives, has seriously looked into reducing and if possible eliminating, the digital divide that exists between the developed urban and the technologically impoverished rural communities. The e-Bario Project, a successful research showcase of Universiti Malaysia Sarawak, is one of the leading examples in Malaysia of such an attempt to bridge the digital gap and to achieve sustainable human development through the introduction of information and communication ...
The Malaysian government inspires the country to become a fully developed nation with an emphasis... more The Malaysian government inspires the country to become a fully developed nation with an emphasis on knowledge-based economy by the year 2020. Though the government has been pushing aggressively for one household to own one computer and at least an Internet connection, it is difficult to see these desires and plans of the Malaysian government going beyond the borders of urban centres and small towns due to the limited infrastructure and amenities. In Sarawak, it has been noted that there are limited mechanisms to ensure that ...
Community Informatics (CI) is the application of ICT to overcome the “digital divide” both within... more Community Informatics (CI) is the application of ICT to overcome the “digital divide” both within and among communities (Gurstien, 2000). Taylor (2004) further asserts that CI is a connection between theory and practice in community networks. In this case, CI refers to the use of ICT for community practice, which Glen (1993) elaborates as encompassing concepts of community development, community service delivery and community action. With the emergence of CI, it is possible for remote communities to enjoy the benefits of ICT for ...
Abstract: This paper describes how community informatics can help to overcome the digital divide ... more Abstract: This paper describes how community informatics can help to overcome the digital divide between rural and urban communities in developing countries of Asia. The e-Bario project, a research initiative undertaken by a group of researchers from Universiti Malaysia Sarawak (UNIMAS) provides a context to demonstrate how information and communication technologies (ICTs) can provide opportunities for remote and rural communities to develop socially, culturally, and economically. The results of the initiative show the many ways in ...
Abstract: In an attempt to close the digital gap between the developed urban and the technologica... more Abstract: In an attempt to close the digital gap between the developed urban and the technologically impoverished rural communities, telecentres have been identified as one of the most acknowledged solution. A baseline study was done on the Long Bedian community to determine its communication pattern taking into consideration certain recommended steps. Findings from the study revealed that the Long Bedian community was deprived of the modern ICT benefits and there is a distinct information gap between the Long Bedian ...
In an IEEE 802.11 Infrastructure network, as the mobile node is moving from one access point to a... more In an IEEE 802.11 Infrastructure network, as the mobile node is moving from one access point to another, the resource allocation and smooth hand off may be a problem. If some reliable prediction is done on mobile node's next move, then resources can be allocated optimally as the mobile node moves around. This would increase the performance throughput of wireless network. We plan to investigate on a hybrid mobility prediction scheme that uses location tracking and data mining to predict the future path of the mobile node. We also propose a secure version of the same scheme. Through simulation and analysis, we present the prediction accuracy of our proposal.
2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000
Rate-based congestion control is effective and simple for traffic management in ATM networks. The... more Rate-based congestion control is effective and simple for traffic management in ATM networks. The enhanced proportional rate control algorithm (EPRCA) is one of the leading single factor rate-based congestion control protocols adopted by the ATM Forum as standard for the available bit rate (ABR) service in ATM networks. In this paper, we study and analyze the performance of EPRCA in terms of its network throughput and cell loss at no congestion state, mild congestion state and severe congestion state respectively. The paper also proposes a new three-factor rate based congestion control scheme using both EFCI and ER marking to achieve better network throughput at no congestion state and lower cell loss at severe congestion state. Further, we also demonstrate through our software simulation that the new scheme with three-factor congestion detection can achieve better network performance than those of a single factor one
2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000
Prediction plays a key role in almost all walks of life. Therefore, a new prediction-based method... more Prediction plays a key role in almost all walks of life. Therefore, a new prediction-based method, known as Kalman congestion avoidance (KACA) scheme is presented for traffic and congestion management in asynchronous transfer mode (ATM) networks. Also, an effort has been made to compare two different congestion avoidance schemes for ATM networks with the KACA scheme, such as Ohio State
The eBario project has won the eAsia Award and the Mondialogo Engineering Award in 2004 and 2005 ... more The eBario project has won the eAsia Award and the Mondialogo Engineering Award in 2004 and 2005 respectively for it's successful implementation of an Information and Telecommunications Technology Center (ICT) and solar renewable energy-incentive rural community project ...
WiFi is a cost effective technology of choice for network extension in the rural areas. The telec... more WiFi is a cost effective technology of choice for network extension in the rural areas. The telecentre network can reach further to the nearby villages within 10km radius by the use of long range WiFi relay points. The challenges encountered will be the self-sustainability of the network. It should be highly energy efficient and to be powered by the very
This paper describes a rural ICT (Information and Communication Technology) project in the most r... more This paper describes a rural ICT (Information and Communication Technology) project in the most remote areas of Sarawak, the Bario and Long Bedian. In the absent of both regular power supply and basic telecommunication infrastructure, the e-Bario and the e-Bedian projects overcome the challenges in providing the community and the schools with Internet connectivity. The telecommunication infrastructure implemented in the project is also discussed which include the use of VSAT(Very Small Aperture Terminal), call routing and wireless technology.
ABSTRACT The paper reviews five important scheduling rules and observes that their prioritization... more ABSTRACT The paper reviews five important scheduling rules and observes that their prioritization weights correspond to marginal utility functions and each of them can therefore be regarded as a gradient-based scheduling and resource allocation algorithm. The MSR and PF rules were found to be channel-aware only schedulers thus making them unable to provide QoS for different applications and users in spite of their high throughput. The M-LWDF, EXP and MDU on the other hand, in addition to being throughput optimal, can provide some amount of QoS differentiation and therefore can be classified as both queue-and channel-aware scheduling rules. All except the MSR were found to provide some amount of acceptable tradeoff between fairness and throughput. Choices are therefore available for diverse scheduling rules which promise support of a wide range of multimedia applications with heterogeneous QoS requirements. Terms— OFDMA, scheduling rules, resource allocation, utility functions.
Abstract The Malaysian government, through many initiatives, has seriously looked into reducing a... more Abstract The Malaysian government, through many initiatives, has seriously looked into reducing and if possible eliminating, the digital divide that exists between the developed urban and the technologically impoverished rural communities. The e-Bario Project, a successful research showcase of Universiti Malaysia Sarawak, is one of the leading examples in Malaysia of such an attempt to bridge the digital gap and to achieve sustainable human development through the introduction of information and communication ...
The Malaysian government inspires the country to become a fully developed nation with an emphasis... more The Malaysian government inspires the country to become a fully developed nation with an emphasis on knowledge-based economy by the year 2020. Though the government has been pushing aggressively for one household to own one computer and at least an Internet connection, it is difficult to see these desires and plans of the Malaysian government going beyond the borders of urban centres and small towns due to the limited infrastructure and amenities. In Sarawak, it has been noted that there are limited mechanisms to ensure that ...
Community Informatics (CI) is the application of ICT to overcome the “digital divide” both within... more Community Informatics (CI) is the application of ICT to overcome the “digital divide” both within and among communities (Gurstien, 2000). Taylor (2004) further asserts that CI is a connection between theory and practice in community networks. In this case, CI refers to the use of ICT for community practice, which Glen (1993) elaborates as encompassing concepts of community development, community service delivery and community action. With the emergence of CI, it is possible for remote communities to enjoy the benefits of ICT for ...
Abstract: This paper describes how community informatics can help to overcome the digital divide ... more Abstract: This paper describes how community informatics can help to overcome the digital divide between rural and urban communities in developing countries of Asia. The e-Bario project, a research initiative undertaken by a group of researchers from Universiti Malaysia Sarawak (UNIMAS) provides a context to demonstrate how information and communication technologies (ICTs) can provide opportunities for remote and rural communities to develop socially, culturally, and economically. The results of the initiative show the many ways in ...
Abstract: In an attempt to close the digital gap between the developed urban and the technologica... more Abstract: In an attempt to close the digital gap between the developed urban and the technologically impoverished rural communities, telecentres have been identified as one of the most acknowledged solution. A baseline study was done on the Long Bedian community to determine its communication pattern taking into consideration certain recommended steps. Findings from the study revealed that the Long Bedian community was deprived of the modern ICT benefits and there is a distinct information gap between the Long Bedian ...
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