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This paper deals with the multiple link/node substrate failures that impact a multicast virtual network (MVN) in which link recovery is not feasible and node migration is mandatory. A novel restoration approach is introduced to repair the failed MVNs while maintaining their quality of service requirements (e.g., end-to-end delay and delay variations). This approach relies on reducing the search region...
Failure in the physical network can cause a temporal or permanent unavailability of some resources, which can lead to a quality of service (QoS) degradation and loss of revenue. While much work has been dedicated to the survival of delay-constrained applications, little attention has been paid to enhancing the performance of the post-failure recovery scheme by maintaining the performance for the affected...
Cellular networks are evolving from traditional homogeneous networks to heterogeneous network (HetNet) to cope with the ever-increasing traffic growth and users' expectations. This new paradigm not only offers a significant improvement in the network capacity and user data rate but also promises improvement in overall network energy efficiency (EE). To achieve these improvements however, radio resources...
Ubiquitous healthcare (U-healthcare) systems are expected to offer flexible and resilient high-end technological solutions enabling remote monitoring of patients health status in real-time and provisioning of feedback and remote actions by healthcare providers. In this paper, we present a 6LowPAN based U-healthcare platform that contributes to the realization of the above expectation. The proposed...
In this paper, we present a novel transmission and reception scheme in LTE heterogeneous networks (HetNets) that exploits the concept of Coordinated Multipoint (CoMP). In the proposed scheme, the uplink (UL) and downlink (DL) transmissions of a User Equipment (UE) are established with different cells assuming the existence of coordination between the cells. The scheme considers the link quality, cell...
For decades, there exist a variety of low-power wireless technologies deployed for healthcare applications such as Zigbee/IEEE802.15.4, Bluetooth, ANT, NFC, IrDA. However, the recently announced Bluetooth Low Energy (BLE) technology claims to offer many new compelling features and is expected to get wide adoption by many mobile manufacturers around the world and hence be included in daily life mobile...
LTE wireless mobile broadband networks, in particularly those based on 3GPP Release 8 (Rel. 8) specification, have already made strong inroads into the commercial arena worldwide. In Malaysia, 8 companies have been allocated spectrum in 2.6GHz Band (LTE band class 7). This paper aims to provide some high level insights on the throughput performance of these spectrums. Although a lot of studies have...
The growing energy consumption in wireless networks driven by dramatic increases in mobile users and network traffic, are putting mobile operators under immense challenges towards meeting the demands of both cost reduction and environment conservation. The network Energy Efficiency (EE) considers not only energy consumed by the base station (BS), but also the capacity and coverage of the network....
The aim of this paper is to evaluate the throughput performance of IEEE802.11n WLANs using a well-known commercial simulator called OPNET Modeler. We study the effects of IP packet size, Modulation and Coding Scheme (MCS), Channel Bonding, number of MIMO spatial streams, Block Acknowledgement (BA) and Type of Service (ToS)/Access Category (AC) on maximum throughput and Throughput Efficiency (TE)....
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