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In this paper, we consider the challenging problem of power allocation in interfering wireless networks with services having stringent delay constraints. The objective is to allocate optimally the power to each user, take advantage of the time diversity of the time varying channel and satisfy the delay constraints of the services. To this end, we model the bit rate dynamics of the users as a linear...
Abstract-For multi-homed streaming service, it is important to enhance the throughput by efficient allocation of resources to the most appropriate interfaces of the User Terminal (UT). However, running multiple interfaces simultaneously can significantly contribute to rapid reduction of battery life. In this work, we propose a Power Minimized Rate Allocation Scheme (PMRAS) with optimal rate allocation...
The proposed resource allocation scheme can boost the spectral efficiency of multi-user OFDMA wireless systems with heterogeneous delay requirements. The existing designs usually have two important assumptions that the users are delay insensitive and Channel State Information at the Transmitter (CSI) is perfect. In practice, users have heterogeneous delay requirements and CSI usually becomes outdated...
The time-varying feature of wireless channels usually makes the hard delay bound for data transmissions unrealistic to guarantee. In contrast, the statistically-bounded delay with a small violation probability has been widely used for delay quality-of-service (QoS) characterization and evaluation. While existing research on the statistical-delay control mainly focused on the single-hop links, in this...
Distributed Clouds, or just D-Clouds, can be seen as a paradigm that is able to exploit the potential of sharing resources across geographic boundaries and provide latency-bound allocation of resources to third-party developers. The representation of D-Cloud resources is a challenge that involves the careful choice of characteristics that drive the mapping of requests on the substrate resources. Regarding...
We consider Quality-of-Information (QoI) aware transmission policies in the presence of time-varying links in a mobile ad hoc network. QoI, tailored for military tactical networks, is defined by a set of attributes relevant to the application. Time-varying nature of links in practical networks leads to uncertainty in evaluating QoI utility to be delivered to end users. This delivered-QoI utility is...
This paper proposes two techniques for reducing the buffer size and computational complexity of an aggregation layer-2 switch (L2SW) in access systems by using buffer observation and multilevel dynamic bandwidth allocation (DBA). The conventional architecture for providing cousin fairness, which realizes fairness among multiple passive optical network (PON) branches, needs a huge buffer in an L2SW...
A key element to realizing the smart energy grid of the future is the deployment of an efficient and reliable information network. An intelligent combination of wired networks (the Internet), wireless networks and power line communication networks can be used to deliver control and application messages generated by the smart grid. Integration of these three network types is non-trivial due to the...
File sharing applications in mobile ad hoc networks (MANETs) have attracted more and more attention in recent years. The efficiency of file querying suffers from the distinctive properties of MANETs including node mobility and limited communication range and resource. An intuitive method to alleviate this problem is to create file replicas in the network. However, despite the efforts on file replication,...
In this paper, we propose a new scheduler able to extend the wireless coverage by using an incentive approach for potential mobile relaying nodes. Indeed, the cost of cooperation can be expensive in terms of QoS and energy consumption which do not motivate the nodes to cooperate. Our incentive approach rewards the cooperative nodes. The percentage of cooperation is considered in the QoS management...
In this paper two Service Specific Queue Sorting Algorithms (SSSA) are proposed for Real Time (RT) and Non Real Time (NRT) streaming video traffic, respectively. The proposed SSSA is implemented in a QoS aware dynamic Packet Scheduling Architecture (PSA) for Long Term Evolution-Advanced (LTE-A) networks and aims at improving the support of QoS guarantee and maintaining the overall system throughput...
One of the fundamental requirements of state-of-the-art and next-generation OFDMA-based wireless communication systems is the provision of quality of service (QoS) guarantees. This paper addresses the design of cross-layer channel-and queue-aware scheduling and resource allocation algorithms jointly assigning transmission data rates, bandwidth and/or power to active users while providing support to...
In recent years, Wireless Sensor Networks (WSNs) are booming to meet the fast-increasing requirements of data-centric services. Current researches on heterogeneous WSNs usually assume the integration of fixed sink node or gateway in WSNs. A few researches have concerned about the mobile terminals acting as a gateway. In order to support high priority communication Quality of Service (QoS), this paper...
3G networks are currently facing severe traffic overload problems caused by excessive demands of mobile users. Offloading part of the 3G traffic through other forms of networks, such as Delay Tolerant Networks (DTNs), WiFi hotspots, and Femtocells, is a promising solution. However, since these networks can only provide intermittent and opportunistic connectivity to mobile users, utilizing them for...
In this paper, we analyze the effective capacity gains of opportunistic spectrum-sharing with imperfect channel information. We consider that a secondary user may access the spectrum allocated to a primary user as long as the average interference power, inflicted at the primary's receiver as an effect of the transmission of the secondary user, remains below predefined power limits. We consider partial...
As wireless and mobile technologies are becoming increasingly pervasive, an uninterrupted connectivity in mobile devices is becoming a necessity rather than a luxury. When dealing with challenged networking environments, this necessity becomes harder to achieve in the absence of end-to-end paths from servers to mobiles. One of the main techniques employed to such conditions is to simultaneously use...
In this paper, we reported an adaptive priority toggle asynchronous tree arbiter for Address Event Representation (AER)-based image sensors. Simultaneous requests from event-triggered pixels, event latency, timing error and jitter are the inherent issues in AER-based read-out circuits. Fixed priority arbiter often results in unfair allocation of bus resource to only “privileged” pixels thus resulting...
3G Long Term Evolution (LTE) is an all internet protocol (IP) based network and one of its main aims is to improve mobile multimedia services. This is achieved through streamlining the system for packet services. This leads to improvements in the form of higher bit rates, lower latencies, and a variety of service offerings. However, more challenging technical difficulties may be expected to arise...
As a complex dynamic system, today's National Airspace System (NAS) can be very sensitive to disruptive events. High density area departure management is particularly sensitive to such disruptions. This paper builds upon previous research that proposes an operational concept to ensure safe, efficient, and stable departure traffic management in the Next Generation Air Transportation System. This research...
In this work, the distributed power allocation problem in universal mobile telecommunication systems (UMTS) is studied under feedback signal-to-noise ratio (SNR) constraints. The sources of uncertainty are assumed to come from the quantization process and measurement noise in the closed-loop system. The power allocation problem is formulated as a reference tracking problem of a pre-defined signal...
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