This document discusses various channel allocation schemes for wireless networks. It begins with an introduction that defines channel allocation and describes different types of schemes - fixed channel allocation (FCA), dynamic channel allocation (DCA), and hybrid schemes. It then provides details on FCA schemes, DCA schemes, hybrid schemes, and compares FCA and DCA. It also discusses modeling of channel allocation and handoff calls. The document provides an in-depth overview of different channel allocation techniques for wireless networks.
PERFORMANCE ENHANCEMENT OF DYNAMIC CHANNEL ALLOCATION IN CELLULAR MOBILE NETW...ijcseit
In cellular mobile communication system the existing dynamic channel allocation scheme suffer from
high blocking probability and forced termination probability. To mitigate this problem, in this paper we
evaluated the performance of dynamic channel allocation scheme based on carrier-to-noise interference
ratio. In our system model, uplink power strength from a call-initiating user to the base station is
examined. This power is provided by the carrier-to-noise ratio (C/N). The channel search is conducted in
the repeated channel numbers of that cell based on the carrier-to-noise ratio so that this system provides
the low blocking probability and initiates large number of calls in dynamic channel allocation
environment. We have presented the momentous performance in blocking probability and forced
termination probability through this research.
It is description about trunking theory that is used to develop trunked system that can allocate a limited number of channels to a large number of users.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
A STUDY ON QUANTITATIVE PARAMETERS OF SPECTRUM HANDOFF IN COGNITIVE RADIO NET...ijwmn
The innovation of wireless technologies requires dynamic allocation of spectrum band in an efficient
manner. This has been achieved by Cognitive Radio (CR) networks which allow unlicensed users to make
use of free licensed spectrum, when the licensed users are kept away from that spectrum. The cognitive
radio makes decision, switching from primary user to secondary user and vice-versa, based on its built-in
interference engine. It allows secondary users to makes use of a channel based on its availability i.e. on the
absence of the primary user and they should vacate the channel once the primary user re-enters and
continue their communication on another available channel and this process in the cognitive radio is
known as spectrum mobility. The main objective of spectrum mobility is that, there is no interruption
caused due to the channel occupied by secondary users and maintains a good quality of service. In order to
achieve better spectrum mobility, it is mandatory to choose an effective spectrum handoff strategy with the
capability of predicting spectrum mobility. The handoff strategy with its parameters and its impact is an
important concept in spectrum mobility but fairly explored. In this paper an empirical study on quantitative
parameters involved in spectrum mobility prediction are discussed in detail. These parameters are studied
extensively because they play a vital role in the spectrum handoff process moreover the impact of these
parameters in various handoff methods can be used to predict the effectiveness of the system.
A SURVEY ON OPTIMIZATION BASED SPECTRUM SENSING TECHNIQUES TO REDUCE ISI AND ...IJNSA Journal
Cognitive radio is emerging technologies in OFDM based wireless systems which are very important for spectrum sensing. By using cognitive radio (CR) high data can be transferred with low bit error rate. The key idea of OFDM is to split the total transmission bandwidth into the subcarriers which further reduce the intersymbol interference (ISI) and peak to average power ratio(PAPR) in the signal. There are many optimization based spectrum sensing techniques are existing for efficient sensing purpose but each has its own advantages and disadvantages. This leads to start the comprehensive study for reducing PAPR and ISI(Intersymbol interference) in terms of FPGA based partial configuration. In the first part of review OFDM characteristics of the signal has compared with several optimizations based ISI reduction techniques. The second part is to compare the various spectrum sensing techniques in cognitive radio engine and its application in FPGA.
Gives you the complete knowledge of different channel allocation techniques, reverse and forward CDMA, GSM Frame Structure, GSM channel Types, cellular concepts, handoff strategies, Frequency reuse and GSM call structure.
This PDF provides a in-depth explanation for all the concepts and practices used before.
PERFORMANCE ENHANCEMENT OF DYNAMIC CHANNEL ALLOCATION IN CELLULAR MOBILE NETW...ijcseit
In cellular mobile communication system the existing dynamic channel allocation scheme suffer from
high blocking probability and forced termination probability. To mitigate this problem, in this paper we
evaluated the performance of dynamic channel allocation scheme based on carrier-to-noise interference
ratio. In our system model, uplink power strength from a call-initiating user to the base station is
examined. This power is provided by the carrier-to-noise ratio (C/N). The channel search is conducted in
the repeated channel numbers of that cell based on the carrier-to-noise ratio so that this system provides
the low blocking probability and initiates large number of calls in dynamic channel allocation
environment. We have presented the momentous performance in blocking probability and forced
termination probability through this research.
It is description about trunking theory that is used to develop trunked system that can allocate a limited number of channels to a large number of users.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
A STUDY ON QUANTITATIVE PARAMETERS OF SPECTRUM HANDOFF IN COGNITIVE RADIO NET...ijwmn
The innovation of wireless technologies requires dynamic allocation of spectrum band in an efficient
manner. This has been achieved by Cognitive Radio (CR) networks which allow unlicensed users to make
use of free licensed spectrum, when the licensed users are kept away from that spectrum. The cognitive
radio makes decision, switching from primary user to secondary user and vice-versa, based on its built-in
interference engine. It allows secondary users to makes use of a channel based on its availability i.e. on the
absence of the primary user and they should vacate the channel once the primary user re-enters and
continue their communication on another available channel and this process in the cognitive radio is
known as spectrum mobility. The main objective of spectrum mobility is that, there is no interruption
caused due to the channel occupied by secondary users and maintains a good quality of service. In order to
achieve better spectrum mobility, it is mandatory to choose an effective spectrum handoff strategy with the
capability of predicting spectrum mobility. The handoff strategy with its parameters and its impact is an
important concept in spectrum mobility but fairly explored. In this paper an empirical study on quantitative
parameters involved in spectrum mobility prediction are discussed in detail. These parameters are studied
extensively because they play a vital role in the spectrum handoff process moreover the impact of these
parameters in various handoff methods can be used to predict the effectiveness of the system.
A SURVEY ON OPTIMIZATION BASED SPECTRUM SENSING TECHNIQUES TO REDUCE ISI AND ...IJNSA Journal
Cognitive radio is emerging technologies in OFDM based wireless systems which are very important for spectrum sensing. By using cognitive radio (CR) high data can be transferred with low bit error rate. The key idea of OFDM is to split the total transmission bandwidth into the subcarriers which further reduce the intersymbol interference (ISI) and peak to average power ratio(PAPR) in the signal. There are many optimization based spectrum sensing techniques are existing for efficient sensing purpose but each has its own advantages and disadvantages. This leads to start the comprehensive study for reducing PAPR and ISI(Intersymbol interference) in terms of FPGA based partial configuration. In the first part of review OFDM characteristics of the signal has compared with several optimizations based ISI reduction techniques. The second part is to compare the various spectrum sensing techniques in cognitive radio engine and its application in FPGA.
Gives you the complete knowledge of different channel allocation techniques, reverse and forward CDMA, GSM Frame Structure, GSM channel Types, cellular concepts, handoff strategies, Frequency reuse and GSM call structure.
This PDF provides a in-depth explanation for all the concepts and practices used before.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Ergodic capacity analysis for underlay cognitive radio systemijmnct
Cognitive radio technology has been proposed as a viable solution to the spectrum scarcity problem faced
by world today. The technology allows opportunistic spectrum access to the licensed frequency band by
unlicensed user without causing any harmful interference to the licensed primary user. In this paper,
ergodic channel capacity is investigated for underlay spectrum sharing system under maximum and
received power constraint at licensed primary receiver. The time varying discrete time fading channels are
assumed to undergo Rayleigh flat fading environment. Numerical simulations have been done to support
theoretical results
Effect of Channel Variations on the Spectral Efficiency of Multiuser Diversit...IDES Editor
The high spectral efficiency or high user data rates
from multiuser diversity scheme using MIMO systems with
antenna selection and MRC reception is very important
development for modern cellular communications. Usually in
a service area of such system, the channel type is assumed to
remain constant, and in a Rayleigh fading environment such
systems are found to provide the highest data rate to a scheduled
user. In a service area using multiuser diversity MIMO
technology, the users at different locations may not experience
the same channel type and hence practically observed data
rates differ from the assumed values. We present in this report
how the scheduled user data rate suffers if the channel type
deviates from Rayleigh to Nakagami-m fading in the cellular
service area, both for absolute or dedicated SNR scheduling
scheme and proportional or normalized SNR scheduling
scheme. We explore the loss of user data rates in different
received SNR regime 0 dB, 10 dB, and 20 dB, and for different
m values with different MIMO configurations. We find that at
0 dB per antenna received SNR the loss of user data rates are
the highest.
A DISTRIBUTED DYNAMIC CHANNEL ALLOCATION IN CELLULAR COMMUNICATIONcscpconf
Now a days, mobile users are growing rapidly and the available frequency spectrum is limited.
Therefore the available spectrum must be efficiently utilized. In response a large number of
channel assignment and allocation policies have been proposed. Mostly Dynamic Channel
Allocation (DCA) has become an important subject of research and development for cellular
networks. In this paper, we propose a distributed dynamic channel allocation (DDCA)
algorithm for originating calls. This algorithm is executed at each base station and to allocate
the channel to mobile station, base station communicates with each other. In DDCA, the total
number of channels is divided into three groups. Any cell in the cluster can acquire the channel
group as long as no one of its adjacent cells is holding the same group. Due to this the cochannel
interference is avoided. The result show blocking rate of distributed dynamic channel allocation is reduced as compared to dynamic channel allocation algorithm with non-uniform traffic distribution
This presentation contains the basic of cellular system.
in which direction the cellular system works and how it changes the network from one bast station to another is simply explained.
how Hand-off occur between two base station is shown via figure to understand well.
the cell system in mobile network and the cell spliting, sectoring, microcell zone concept is also explained well.
Please take a look.
may be it is helpfull for you.
Thank you.
Improved Cell Coverage in Hilly Areas using Cellular AntennasEswar Publications
This paper proposes an improved configuration of Cellular Antennas for terrains like hills where network coverage is poor and a number of black spots are very high. The proposed solution delivers efficient and much robust antenna structure which provides better network coverage by using 90-degree sector antennas. The radio spectrum of the 90-degree sector antenna is also shown to give the idea of cell coverage in order to build aseamless network in the region.This paper also proposes different channel allocation schemes that can be used with the proposed antenna configuration to deliver better network coverage and low call dropping probability.
This is achieved by analyzing the terrain of the region and also the cellular traffic in the region. In areas where network traffic is almost constant or have low population, strategies like fixed channel allocation can be used effectively and efficiently. While in the areas where traffic is unpredictable or is subject to regional festivals or tourism, channel strategies like dynamic channel allocation are very useful to fulfill the demand of the overall network. The simulations and validations for the proposed methodology are done using MATLAB.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Ergodic capacity analysis for underlay cognitive radio systemijmnct
Cognitive radio technology has been proposed as a viable solution to the spectrum scarcity problem faced
by world today. The technology allows opportunistic spectrum access to the licensed frequency band by
unlicensed user without causing any harmful interference to the licensed primary user. In this paper,
ergodic channel capacity is investigated for underlay spectrum sharing system under maximum and
received power constraint at licensed primary receiver. The time varying discrete time fading channels are
assumed to undergo Rayleigh flat fading environment. Numerical simulations have been done to support
theoretical results
Effect of Channel Variations on the Spectral Efficiency of Multiuser Diversit...IDES Editor
The high spectral efficiency or high user data rates
from multiuser diversity scheme using MIMO systems with
antenna selection and MRC reception is very important
development for modern cellular communications. Usually in
a service area of such system, the channel type is assumed to
remain constant, and in a Rayleigh fading environment such
systems are found to provide the highest data rate to a scheduled
user. In a service area using multiuser diversity MIMO
technology, the users at different locations may not experience
the same channel type and hence practically observed data
rates differ from the assumed values. We present in this report
how the scheduled user data rate suffers if the channel type
deviates from Rayleigh to Nakagami-m fading in the cellular
service area, both for absolute or dedicated SNR scheduling
scheme and proportional or normalized SNR scheduling
scheme. We explore the loss of user data rates in different
received SNR regime 0 dB, 10 dB, and 20 dB, and for different
m values with different MIMO configurations. We find that at
0 dB per antenna received SNR the loss of user data rates are
the highest.
A DISTRIBUTED DYNAMIC CHANNEL ALLOCATION IN CELLULAR COMMUNICATIONcscpconf
Now a days, mobile users are growing rapidly and the available frequency spectrum is limited.
Therefore the available spectrum must be efficiently utilized. In response a large number of
channel assignment and allocation policies have been proposed. Mostly Dynamic Channel
Allocation (DCA) has become an important subject of research and development for cellular
networks. In this paper, we propose a distributed dynamic channel allocation (DDCA)
algorithm for originating calls. This algorithm is executed at each base station and to allocate
the channel to mobile station, base station communicates with each other. In DDCA, the total
number of channels is divided into three groups. Any cell in the cluster can acquire the channel
group as long as no one of its adjacent cells is holding the same group. Due to this the cochannel
interference is avoided. The result show blocking rate of distributed dynamic channel allocation is reduced as compared to dynamic channel allocation algorithm with non-uniform traffic distribution
This presentation contains the basic of cellular system.
in which direction the cellular system works and how it changes the network from one bast station to another is simply explained.
how Hand-off occur between two base station is shown via figure to understand well.
the cell system in mobile network and the cell spliting, sectoring, microcell zone concept is also explained well.
Please take a look.
may be it is helpfull for you.
Thank you.
Improved Cell Coverage in Hilly Areas using Cellular AntennasEswar Publications
This paper proposes an improved configuration of Cellular Antennas for terrains like hills where network coverage is poor and a number of black spots are very high. The proposed solution delivers efficient and much robust antenna structure which provides better network coverage by using 90-degree sector antennas. The radio spectrum of the 90-degree sector antenna is also shown to give the idea of cell coverage in order to build aseamless network in the region.This paper also proposes different channel allocation schemes that can be used with the proposed antenna configuration to deliver better network coverage and low call dropping probability.
This is achieved by analyzing the terrain of the region and also the cellular traffic in the region. In areas where network traffic is almost constant or have low population, strategies like fixed channel allocation can be used effectively and efficiently. While in the areas where traffic is unpredictable or is subject to regional festivals or tourism, channel strategies like dynamic channel allocation are very useful to fulfill the demand of the overall network. The simulations and validations for the proposed methodology are done using MATLAB.
Frequencies management,Channel assignments,
Frequency reuse, System capacity and its improvement: Cell spliting and sectoring, Handoffs & its types, prioritizing handoff, Umbrella cell approach, Cell dragging, Roaming, Co channel and adjacent channel interference, Improving coverage- Repeaters for range extension and microcell zone concept, Examples
Improved Algorithm for Throughput Maximization in MC-CDMAVLSICS Design
The Multi-Carrier Code Division Multiple Access (MC-CDMA) is becoming a very significant downlink multiple access technique for high-rate data transmission in the fourth generation wireless communication systems. By means of efficient resource allocation higher data rate i.e. throughput can be achieved. This paper evaluates the performance of group (subchannel) allocation criteria employed in downlink transmission, which results in throughput maximization. Proposed algorithm gives the modified technique of sub channel allocation in the downlink transmission of MC-CDMA systems. Simulation are carried out for all the three combining schemes, results shows that for the given power and BER proposed algorithm comparatively gives far better results .
EFFICIENT UTILIZATION OF CHANNELS USING DYNAMIC GUARD CHANNEL ALLOCATION WITH...cscpconf
User mobility in wireless data networks is increasing because of technological advances and the
desire for voice and multimedia applications. These applications, however, require fast handoffs
between base stations to maintain the quality of the connections. In this paper, the authors
describe the use of novel and efficient data structure which dynamically allocates guard channel
for handoffs and introduces the concept of channel borrowing strategy. The proposed scheme
allocates the guard channels for handoff requests dynamically, based on the traffic load for
certain time period. A new originating call in the cell coverage area also uses these guard
channels if they are unused. Our basic idea is to allow Guard channels to be shared between new calls and handoff calls. This approach maximizes the channel utilization. The simulation results prove that the channel borrowing scheme improves the overall throughput.
Optimization of Quality of Service Parameters for Dynamic Channel Allocation ...ijngnjournal
As the spectrum for wireless transmission gets crowded due to the increase in the users and applications, the efficient use of the spectrum is a major challenge in today’s world. A major affecting factor is the inefficient usage of the frequency bands. Interference in the neighboring cells affects the reuse of the frequency bands. In this paper, some of the quality of service parameters such as residual bandwidth, number of users, duration of calls, frequency of calls and priority are considered. This paper presents work based on the optimization of dynamic channel allocation using genetic algorithm (GA). This attempts to allocate the channel to users such that overall congestion in the network is minimized by reusing already allocated frequencies. The working of Genetic Algorithm which is used in the optimization procedure is also explained. The optimized channel is then compared with a non-optimized channel to check the efficiency of the genetic algorithm.
Channel feedback scheduling for wireless communicationseSAT Journals
Abstract Opportunistic scheduling can significantly improve wireless network performance by exploiting the underlying channel condition. There has been a lot of work on opportunistic scheduling, but the problem of finding the right feedback mechanism to convey channel information has largely been untouched. In emerging multichannel systems, the per-channel feedback induces a substantial amount of feedback overhead and requires high computational complexity. To reduce the feedback overhead, we consider an opportunistic feedback strategy that activates the channel feedback opportunistically according to the channel condition. Then, we combine the opportunistic feedback with the best-n channel feedback scheme where a mobile user chooses the best n channels and transfers this information to the base station. We analyze the throughput and the amount of channel feedback information for proportionally fair opportunistic scheduling under Rayleigh fading i.i.d. channels. The numerical results confirm that our partial feedback schemes achieve a remarkable reduction in the amount of feedback information without significant throughput degradation, thereby saving the scarce wireless bandwidth and limited battery power.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.