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Full-Text Articles in Computer Engineering
Fair And Qos-Oriented Resource Management In Heterogeneous Networks, Mustafa Cenk Erturk, Ismail Guvenc, Sayandev Mukherjee, Huseyin Arslan
Fair And Qos-Oriented Resource Management In Heterogeneous Networks, Mustafa Cenk Erturk, Ismail Guvenc, Sayandev Mukherjee, Huseyin Arslan
Electrical and Computer Engineering Faculty Publications
In this paper, a heterogeneous network composed of femtocells deployed within a macrocell network is considered, and a quality-of-service (QoS)-oriented fairness metric which captures important characteristics of tiered network architectures is proposed. Using homogeneous Poisson processes, the sum capacities in such networks are expressed in closed form for co-channel, dedicated channel, and hybrid resource allocation methods. Then a resource splitting strategy that simultaneously considers capacity maximization, fairness constraints, and QoS constraints is proposed. Detailed computer simulations utilizing 3GPP simulation assumptions show that a hybrid allocation strategy with a well-designed resource split ratio enjoys the best cell-edge user performance, with minimal …
Gesture Recognition Using Neural Networks Based On Hw/Sw Cosimulation Platform, Priyanka Mekala, Jeffrey Fan, Wen-Cheng Lai, Ching-Wen Hsue
Gesture Recognition Using Neural Networks Based On Hw/Sw Cosimulation Platform, Priyanka Mekala, Jeffrey Fan, Wen-Cheng Lai, Ching-Wen Hsue
Electrical and Computer Engineering Faculty Publications
Hardware/software (HW/SW) cosimulation integrates software simulation and hardware simulation simultaneously. Usually, HW/SW co-simulation platform is used to ease debugging and verification for very large-scale integration (VLSI) design. To accelerate the computation of the gesture recognition technique, an HW/SW implementation using field programmable gate array (FPGA) technology is presented in this paper. The major contributions of this work are: (1) a novel design of memory controller in the Verilog Hardware Description Language (Verilog HDL) to reduce memory consumption and load on the processor. (2) The testing part of the neural network algorithm is being hardwired to improve the speed and performance. …
A Fuzzy Preprocessing Module For Optimizing The Access Network Selection In Wireless Networks, Faisal Kaleem, Abolfazl Mehbodniya, Kang K. Yen, Fumiyuki Adachi
A Fuzzy Preprocessing Module For Optimizing The Access Network Selection In Wireless Networks, Faisal Kaleem, Abolfazl Mehbodniya, Kang K. Yen, Fumiyuki Adachi
Electrical and Computer Engineering Faculty Publications
A heterogeneous wireless network is characterized by the presence of different wireless access technologies that coexist in an overlay fashion. These wireless access technologies usually differ in terms of their operating parameters. On the other hand, Mobile Stations (MSs) in a heterogeneous wireless network are equipped with multiple interfaces to access different types of services from these wireless access technologies. The ultimate goal of these heterogeneous wireless networks is to provide global connectivity with efficient ubiquitous computing to these MSs based on the Always Best Connected (ABC) principle. This is where the need for intelligent and efficient Vertical Handoffs (VHOs) …
Deployment Of A Hybrid Multicast Switch In Energy-Aware Data Center Network: A Case Of Fat-Tree Topology, Tosmate Cheocherngngarn, Jean Andrian, Deng Pan
Deployment Of A Hybrid Multicast Switch In Energy-Aware Data Center Network: A Case Of Fat-Tree Topology, Tosmate Cheocherngngarn, Jean Andrian, Deng Pan
Electrical and Computer Engineering Faculty Publications
Recently, energy efficiency or green IT has become a hot issue for many IT infrastructures as they attempt to utilize energy-efficient strategies in their enterprise IT systems in order to minimize operational costs. Networking devices are shared resources connecting important IT infrastructures, especially in a data center network they are always operated 24/7 which consume a huge amount of energy, and it has been obviously shown that this energy consumption is largely independent of the traffic through the devices. As a result, power consumption in networking devices is becoming more and more a critical problem, which is of interest for …
On-Line Real-Time Service-Oriented Task Scheduling Using Tuf, Shuo Liu, Gang Quan, Shangping Ren
On-Line Real-Time Service-Oriented Task Scheduling Using Tuf, Shuo Liu, Gang Quan, Shangping Ren
Electrical and Computer Engineering Faculty Publications
We present our approach to real-time service-oriented scheduling problems with the objective of maximizing the total system utility. Different from the traditional utility accrual scheduling problems that each task is associated with only a single time utility function (TUF), we associate two different TUFs—a profit TUF and a penalty TUF—with each task, to model the real-time services that not only need to reward the early completions but also need to penalize the abortions or deadline misses. The scheduling heuristics we proposed in this paper judiciously accept, schedule, and abort real-time services when necessary to maximize the accrued utility. Our extensive …
Quasi-Orthogonal Space-Time Block Coding Using Polynomial Phase Modulation, Omar Granados, Jean Andrian
Quasi-Orthogonal Space-Time Block Coding Using Polynomial Phase Modulation, Omar Granados, Jean Andrian
Electrical and Computer Engineering Faculty Publications
Recently, polynomial phase modulation (PPM) was shown to be a power- and bandwidth-efficient modulation format. These two characteristics are in high demand nowadays specially in mobile applications, where devices with size, weight, and power (SWaP) constraints are common. In this paper, we propose implementing a full-diversity quasiorthogonal space-time block code (QOSTBC) using polynomial phase signals as modulation format. QOSTBCs along with PPM are used in order to improve the power efficiency of communication systems with four transmit antennas. We obtain the optimal PPM constellations that ensure full diversity and maximize the QOSTBC's minimum coding gain distance. Simulation results show that …