Search or add a thesis

Advanced Search (Beta)
Home > Utility Aware Resource Management for Device to Device Communication

Utility Aware Resource Management for Device to Device Communication

Thesis Info

Access Option

External Link

Author

Mushtaq Ahmad

Program

PhD

Institute

COMSATS University Islamabad

City

Wah Cantt

Province

Punjab

Country

Pakistan

Thesis Completing Year

2017

Thesis Completion Status

Completed

Subject

Technological Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/9405/1/Mushtaq_Ahmad_Electrical_Engineering_HSR_2018_CIIT_08.08.2018.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727855825

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


Since the deployment of 1G cellular networks, cellular operators are constantly striving towards achieving higher data rates. Next generation networks are expected to meet the demands of subscribers for high data rates. To meet these challenging requests of higher data rates, the telecom research community is focusing its attention towards hexa dimensional resource management techniques in next generation cellular networks. These techniques include use of heterogeneous networks (hetnets), power allocation, channel allocation, broad band and efficient spectrum utilization, noise control methods and interference management. In next generation networks, a major portion of system throughput enhancements is expected to come from device to device (D2D) communication which is viewed as part of hetnets. In this thesis, D2D communication is considered the main enabling feature of hetnets to enhance throughput and its intelligent resource management is imperative. The scope of this work is further broadened by integration of cognitive radio network (CRN) concepts into the D2D resource management. To further boost data rates, D2D concept is extended by incorporation of communication among devices to devices (Ds2Ds) and their intelligent resource management. Resource management is a domain wherein resources are intelligently allocated to various users. Resource management aspects considered in this thesis include admission control, mode selection and power allocation. This work considers D2D joint resource allocation to maximize the overall throughput of cellular networks having D2D capabilities while observing the sanctity of constraints of power, quality of service (QoS) and interference. This problem is NP-complete and is classified as mixed integer non-linear optimization problem. Computational complexity of the exhaustive search algorithm (ESA) increases exponentially with the number of users. This makes it very difficult to find optimal solution for such kind of problems. In this work, convergent solutions for solving the joint resource allocation problem in D2D communication has been presented. By exploiting the special structure of the problem, outer approximation algorithm (OAA) and mesh adaptive direct search (MADS) algorithms have been used to obtain epsilon-optimal solution. Using joint utility function, different scenarios of simulation results confirm effectiveness of MADS viz-a-viz OAA. Performance of MADS was found to be equal to that of ESA. Cognitive assisted D2D network is an emerging domain which utilizes television (TV) white space spectrum. Joint resource allocation of CRN assisted D2D networks along with constraints of transmit power, QoS and interference (related to TV users) is considered in this thesis. The problem is mathematically modelled with a utility function having two terms related to maximization of admitted users and maximization of overall system throughput. MADS algorithm is adopted for solution of NP-complete problems. Simulation results compare different scenarios using ESA and MADS algorithm. Results of simulation testify to the fact that MADS provides solution close to optimal with reasonable complexity. In Ds2Ds resource management problem, the objective is to maximize energy efficiency of Ds2Ds communication, subject to compliance of constraints related to radio resources, quality of service (QoS) and interference. Performance of Ds2Ds is bench marked with multi-homing technique and devices to device (Ds2D) communication. The objective of maximization of energy efficiency reinforces the much sought-after green communication.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

23. Al-Mu’minun/The Believers

23. Al-Mu’minun/The Believers

I/We begin by the Blessed Name of Allah

The Immensely Merciful to all, The Infinitely Compassionate to everyone.

23:01
a. Indeed, The Believers will succeed.

23:02
a. The Believers are those who humble themselves in their Salat/Prayers,

23:03
a. and those who avoid frivolous talk and behavior,

23:04
a. and those who regularly pay out the Zakat/annual charity,

23:05
a. and those who guard their chastity -

23:06
except from their spouses or from those whom their right hands possess -
for then, indeed, they are free from blame.

23:07
a. But whoever seeks beyond that limit, those - they are the transgressors,

23:08
a. and those who faithfully keep their trusts, pledges, contracts, and promises,

23:09
a. and those who guard their Salat/Prayers from worldly distractions.

23:10
a. It is they - they are the inheritors -

23:11
who will inherit the Paradise of Firdaws,
they will live therein forever!

23:12
And, indeed, WE created the human being out of the essence of clay.

23:13
Thereafter, WE made him as a mingled drop in a secure repository of the female’s womb.

23:14
And, then, WE made an embryo/clot from the drop,
and then WE made a lump from the embryo/clot,
and, then, WE made bones from the chewed-up lump,
and, then, WE clothed the bones with flesh and muscles.
And, then, out of that tiny drop, WE structured him into yet another creation.
So Exalted is Allah - the Best Creator of all creators!

علامہ ابن جوزی کی تفسیر

This article describes the methodology and characteristics of Zad al-masir fi ‘ilm al-tafsir. This is one the finest work of Allama Ibn al-Jawzī, a 6th century prominent Interpreter. Several editions of this Tafsir have been published. However, the edition of dar al-kitab al-‘arbi, Beirut published in four volumes is selected for this study. This exegesis is based on conventional narrations, authentic quotations from the Islamic Scholars and lingual & grammatical discussions. As a witness, causes of verses (asbab al-Nuz┴l), Makki and Madani Surah’s (chapters), the abrogating and abrogated verses (al-nasikh wal-mans┴kh) and Islamic jurisprudence have been discussed in it where needed. The quality of this translation which is admirable is that mostly authentic Ahadith from original sources, and references to well known basic books in relevant discussions have been described.

Role of Crop Field Boundary Vegetation in Population Ecology of Passerine Birds in Pothwar Plateau, Pakistan

An agro-ecosystem demands intensive human activities related to farm operations to get optimum crop yield but such actions negatively affect local biodiversity including avifauna. Pothwar plateau of Pakistan covers an area of ~ 23,160 km2, totally dependent on rain water. About 110,600 haarea of the plateau is under cultivation while the rest of it contains scrub forest and rangeland. The agriculture consists of two major traditional cropping systems i.e. wheatmaize/millet and wheat-groundnut. Due to its unique topography and climatic conditions the plateau is famous for hosting important floral and faunal diversity of Pakistan. Like other regions of the country the Pothwar landscape is also under tremendous pressure of urbanization and agriculture expansion. An inverse relationship between agriculture expansion and loss of wild habitat is 15 reducing food and shelter to its native species including avifauna.This is causing many bird species (mostly Passeriformes) to adopt croplands for nesting, feeding and breeding. Since no reliable record of passerine birds associated with field boundary vegetation in this region is available therefore, the present study was conducted to investigate anthropogenic use, diversity and abundance of the cropfield- edge vegetation, seasonal diversity and species richness of passerine birds utilizing this vegetation for feeding, nesting and breeding. The study was carried out at four isolated patches of croplands, each covering an area of 1 km2. The anthropogenic practices were studied by interviews of 94 farmers and/or their workers. The farmers reported two main cropping systems i.e. wheat (intercropped with mustard) - groundnut and wheat-maize/millet. The livestock mainly consists of goats and cattle which are usually grazed on wild vegetation adjacent to the farmlands. Animal grazing in croplands is allowed after harvest or during pre-monsoon season. The farmers plant fast growing shrubs along crop field margins for fodder browse and fuel wood. Burningof crop residues and dry vegetation is not a common practice. Inorganic fertilizers commonly urea and DAP are used to enhance crop yield. Weeds, insect and rodent pests infest the food crops. Weeds are usually removed manually with some use of surface herbicides. Chemical control of insect and rodent pests is a popular practice while the farmers lackany knowledge on beneficial roles of birds in their croplands.Vegetation analysis revealed occurrence of 51 floral species on crop field boundariesincluding 12 tree species among which dominant were Acacia modesta and Zizyphus mauritiana, 14 species of shrubs and 25 species of herbs/grasses. Seasonal avian densities were estimated by point countswhich scored 25 species of birds including 20 resident and five migrants/winter visitorspecies. Most common and abundant bird species were house sparrow (Passer domesticus), common myna 16 (Acridotheres tristis), redvented bulbul (Pycnonotus cafer) and Himalayan bulbul (Pycnonotus leucogenys)while comparatively less common species were Indian tailor bird (Orthotomu ssutorius), common lark (Alauda arvensis), ashy drongo (Dicrurus leucophaeus) and ashy prinia (Prinia socialis). Other avian species were rare and confined to specific cropping systems. The migrants/winter visitors were recorded from November to March. Bird density and diversity decreased during summer due to absence of migratory birds as well as low availability of food. More numbers and species of birds were present at sites that had wheat-maize/millet cropping system and were in close proximity to rain water ponds which provide better living conditions to rare and infrequent birds in this arid ecosystem.Food habits of nine bird species determined by microhistological analysis of fecal droppings revealed that red-vented bulbul and Himalayan bulbul inhabiting this agro-ecosystem were frugivores. Ashy prinia, pied bushchat (Saxicola caprata) and ashy drongo fed exclusively on insects many of which are crop pests in this agro-ecosystem while common myna, common lark, large grey babbler (Turdoides malcolmi) and Indian tailorbird were omnivorous in their dietary habits. These species fed on wheat, maize and millet during some part of the year and they also visited crops for invertebrates particularly insects pests. None of these birds have status of pest in this agroecosystem. The breeding ecology of ashy prinia, red-vented bulbul, Himalayan bulbul, ashydrongo and large grey babbler revealed that prinia and the bulbuls utilized shrubs bordering the crop fields for nesting while drongos and babblers used the trees. The nests were constructed at low heights and were prone to ground predators like snakes and domestic cats while humans were also observed disturbing the eggs and nestlings of these birds. Due to these predators and general disturbance low hatching, fledging and breeding success of these species was observed in this agro-ecosystem. The study suggests enhancement and 17 conservation of roosting, foraging and nesting sites of birds in this arid agroecosystem region which could be accomplished by maintaining heterogeneity of native natural vegetation and patches of uncultivated land that act as bird refugeesas well as reduction in unwanted human activities and habitat degradation.