Ukufa

البحوث المنشورة

Simple PDF of the sum and maximum of non-identical fluctuating two-ray variates

الباحث الأول: Hussien Al-Hmood

الباحثين الآخرين: Rafed Sabbar Abbas, Hamid Alrwashidy

المجلة: IET JOURNAL

تاريخ النشر: None

مختصر البحث:

Probability density function of the sum and maximum of non-identical fluctuating two-ray variates are derived in terms of the power and exponential functions. Novel mathematically tractable expressions of the outage probability and average bit error…

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Extended α-η-μ Fading Distribution: Statistical Properties and Applications

الباحث الأول: Hussien Al-Hmood

الباحثين الآخرين: Rafed Sabbar Abbas; Hamed Al-Raweshidy

المجلة: IEEE Access

تاريخ النشر: None

مختصر البحث:

In this paper, the impact of the non-linearity of the propagation medium on the extended η - μ fading distribution is studied. In particular, the extended α - η - μ fading model in which the parameter α represents the non-linearity of the propagatio…

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Smart data packet ad hoc routing protocol, Computer Networks

الباحث الأول: Saman Hameed Amin

الباحثين الآخرين: H.S. Al-Raweshidy, Rafed Sabbar Abbas

المجلة: CN

تاريخ النشر: None

مختصر البحث:

This paper introduces a smart data packet routing protocol (SMART) based on swarm technology for mobile ad hoc networks. The main challenge facing a routing protocol is to cope with the dynamic environment of mobile ad hoc networks. The problem of f… This paper introduces a smart data packet routing protocol (SMART) based on swarm technology for mobile ad hoc networks. The main challenge facing a routing protocol is to cope with the dynamic environment of mobile ad hoc networks. The problem of finding best route between communication end points in such networks is an NP problem. Swarm algorithm is one of the methods used solve such a problem. However, copping with the dynamic environment will demand the use of a lot of training iterations. We present a new infrastructure where data packets are smart enough to guide themselves through best available route in the network. This approach uses distributed swarm learning approach which will minimize convergence time by using smart data packets. This will decrease the number of control packets in the network as well as it provides continues learning which in turn provides better reaction to changes in the network environment. The learning information is distributed throughout the nodes of the network. This information can be used and updated by successive packets in order to maintain and find better routes. This protocol is a hybrid Ant Colony Optimization (ACO) and river formation dynamics (RFD) swarm algorithms protocol. ACO is used to set up multi-path routes to destination at the initialization, while RFD mainly used as a base algorithm for the routing protocol. RFD offers many advantages toward implementing this approach. The main two reasons of using RFD are the small amount of information that required to be added to the packets (12 bytes in our approach) and the main idea of the RFD algorithm which is based on one kind of agent called drop that moves from source to destination only. This will eliminate the need of feedback packets to update the network and offers a suitable solution to change data packet into smart packets. Simulation results shows improvement in the throughput and reduction in end to end delay and jitter compared to AODV and AntHocNet protocols.

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“Number of wavelengths required in M –arity tree networks

الباحث الأول: Rafed Sabbar Abbas

الباحثين الآخرين: N. Al-Aboody ; H.S. Al-Raweshidy

المجلة: IET

تاريخ النشر: None

مختصر البحث:

A theory to allocate a wavelength in the tree networks coordinated arrangement in m -arity networks is proposed. Wavelength required equations to support all-to-all unicasting in the network according to its depth are presented. Three cases are exam…

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“A Distributed Algorithm in WDM Network to Increase Network Capacity and Minimize Conversion Range

الباحث الأول: Rafed Sabbar Abbas

الباحثين الآخرين: Hussien Al-Hmood, Saman Hameed Amin, H.S. AlRaweshidy

المجلة: IJAEST

تاريخ النشر: None

مختصر البحث:

A distributed wavelength assignment technology has been investigated in this work. The Distributed Static Highest Number of Destination (DSHND) algorithm is analysed and compared with two other distributed algorithms. The tree network investigated i…

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Cooperative Sensing for Dynamic Spectrum Access in Cognitive Wireless Mesh Networks

الباحث الأول: A. Masrub

الباحثين الآخرين: R.S. Abbas, H. Al-Hmood, M. Iqbal and H.S. Al-Raweshidy

المجلة: BMSB

تاريخ النشر: None

مختصر البحث:

In recent years, Wireless Mesh Networks (WMNs) considered as a practical solution for last-mile broadband wireless internet access. In this mode of wireless ad hoc networks, nodes may play the role of APs or Mesh Routers (MRs) to offer a short way t…

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High QoS and Low Cost Wavelength Allocation Protocol in Optical Network Using Multicast Technology

الباحث الأول: Rafed Sabbar Abbas

الباحثين الآخرين: A. Masrub, Saman Hameed Amin, H.S. Al-Raweshidy

المجلة: INTECH 2013

تاريخ النشر: None

مختصر البحث:

The construction of light-trees is one of the principal sub-problems for all-optical multicast technology in wavelength division multiplexing (WDM) networks. In this paper a new algorithm proposed to maximize quality of service by minimizing dispers…

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An estimation of primary user's SNR for spectrum sensing in cognitive radios,

الباحث الأول: Al-Hmood, H.

الباحثين الآخرين: Abbas, R.S.; Masrub, A.; Al-Raweshidy, H.S.

المجلة: INTECH

تاريخ النشر: None

مختصر البحث:

The accuracy for any spectrum sensing technique in cognitive radio (CR) is affected by the transmission channel parameters such as the signal to noise ratio (SNR). In this paper, a special approach is used to estimate the SNR in the received primary…

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"New multicast switch-based multicast wavelength allocation algorithm to increase network capacity,"

الباحث الأول: Rafed Abbas

الباحثين الآخرين: Al-Raweshidy, H.

المجلة: ICFCN

تاريخ النشر: None

مختصر البحث:

Wavelength assignment is a widely research object and especially in optical networks. The centralized algorithm has been proposed in this paper and there are two scenarios for our algorithm. The main effect and improvement in the algorithm is to sav…

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"New multicast switch and algorithm to increase network capacity,"

الباحث الأول: Rafed Abbas

الباحثين الآخرين: Al-Raweshidy, Hamed Saffa; Radhi, Nazar; Alabdulkreem, Eatedal

المجلة: ICT

تاريخ النشر: None

مختصر البحث:

Dynamic wavelength allocation (DWA) in multicast (MC) switching has been investigated in this paper. The aim for this investigation is to maximize the network capacity and minimize the blocking probability in the wavelength division multiplexing net…

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"A New Centralized Multicast Wavelength Allocation Algorithm in Optical Fiber Network"

الباحث الأول: Rafed Sabbar Abbas

الباحثين الآخرين: Hamed Saffa Al-Raweshidy

المجلة: JSCSE

تاريخ النشر: None

مختصر البحث:

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“Cyclostationary Detection in Spectrum Pooling System of Undefined Secondary Users”

الباحث الأول: Nazar Radhi

الباحثين الآخرين: Kahtan Aziz , Rafed Sabbar Abbas , Hamed AL-Raweshidy

المجلة: ICWMC

تاريخ النشر: None

مختصر البحث:

Spectrum sensing continuing to emerge as an essential topic for the cognitive networks where two kinds of users primary and secondary will share the band. This paper proposes a method for real-time detection of secondary users at the base statio…

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“Next Generation Network: Wireless-Optics Technologies”

الباحث الأول: Alfredo Viglienzoni

الباحثين الآخرين: Hamed Al-Raweshidy, Rafed Abbas

المجلة: Net!

تاريخ النشر: None

مختصر البحث:

white paper

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التفاصيل:

لقد تم إختيار الدكتور رافد صبار الأستاذ في جامعة الكوفة كلية الهندسة كمقيم للبحوث العلمية في المؤسسة العلمية البريطانية IET وقد تم تقييم عشرة بحوث خلال العامين 2018-2019 وهم كما موضح أدناه: 1. 'A Dynamic Heuristics for the Recomposition of Service Function Chain' 2. 'Energy Efficient Ch…

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التفاصيل:

بحث علمي في مجال هندسة الإتصالات قد تم نشره بواسطة فريق بحثي أحد أعضاءه تدريسي في قسم الهندسة الكهربائية في كلية الهندسة - جامعة الكوفة تحت عنوان "Simple PDF of the sum and maximum of non-identical fluctuating two-ray variates"

عرض المزيد

رافد صبار عباس /

رافد صبار عباس /

الملف الشخصي

الاهتمامات البحثية

البحوث المنشورة

Simple PDF of the sum and maximum of non-identical fluctuating two-ray variates

Extended α-η-μ Fading Distribution: Statistical Properties and Applications

Smart data packet ad hoc routing protocol, Computer Networks

“Number of wavelengths required in M –arity tree networks

“A Distributed Algorithm in WDM Network to Increase Network Capacity and Minimize Conversion Range

Cooperative Sensing for Dynamic Spectrum Access in Cognitive Wireless Mesh Networks

High QoS and Low Cost Wavelength Allocation Protocol in Optical Network Using Multicast Technology

An estimation of primary user's SNR for spectrum sensing in cognitive radios,

"New multicast switch-based multicast wavelength allocation algorithm to increase network capacity,"

"New multicast switch and algorithm to increase network capacity,"

"A New Centralized Multicast Wavelength Allocation Algorithm in Optical Fiber Network"

“Cyclostationary Detection in Spectrum Pooling System of Undefined Secondary Users”

“Next Generation Network: Wireless-Optics Technologies”

المحاضرات

matrics Mathematics III

vectors Mathematics III

inner product Mathematics III

outer product Mathematics III

الأخبار والإعلانات

تقییم بحوث علمیة في مجلة بريطانية

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