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Author: Sanchita Ghosh
Publisher: Springer
ISBN: 9783642434532
Category : Computers
Languages : en
Pages : 0
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Book Description
Call Admission Control (CAC) and Dynamic Channel Assignments (DCA) are important decision-making problems in mobile cellular communication systems. Current research in mobile communication considers them as two independent problems, although the former greatly depends on the resulting free channels obtained as the outcome of the latter. This book provides a solution to the CAC problem, considering DCA as an integral part of decision-making for call admission. Further, current technical resources ignore movement issues of mobile stations and fluctuation in network load (incoming calls) in the control strategy used for call admission. In addition, the present techniques on call admission offers solution globally for the entire network, instead of considering the cells independently. CAC here has been formulated by two alternative approaches. The first approach aimed at handling the uncertainty in the CAC problem by employing fuzzy comparators. The second approach is concerned with formulation of CAC as an optimization problem to minimize call drop, satisfying a set of constraints on feasibility and availability of channels, hotness of cells, and velocity and angular displacement of mobile stations. Evolutionary techniques, including Genetic Algorithm and Biogeography Based Optimization, have been employed to solve the optimization problems. The proposed approaches outperform traditional methods with respect to grade and quality of services.
Author: Sanchita Ghosh
Publisher: Springer
ISBN: 3642309976
Category : Technology & Engineering
Languages : en
Pages : 242
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Book Description
Call Admission Control (CAC) and Dynamic Channel Assignments (DCA) are important decision-making problems in mobile cellular communication systems. Current research in mobile communication considers them as two independent problems, although the former greatly depends on the resulting free channels obtained as the outcome of the latter. This book provides a solution to the CAC problem, considering DCA as an integral part of decision-making for call admission. Further, current technical resources ignore movement issues of mobile stations and fluctuation in network load (incoming calls) in the control strategy used for call admission. In addition, the present techniques on call admission offers solution globally for the entire network, instead of considering the cells independently. CAC here has been formulated by two alternative approaches. The first approach aimed at handling the uncertainty in the CAC problem by employing fuzzy comparators. The second approach is concerned with formulation of CAC as an optimization problem to minimize call drop, satisfying a set of constraints on feasibility and availability of channels, hotness of cells, and velocity and angular displacement of mobile stations. Evolutionary techniques, including Genetic Algorithm and Biogeography Based Optimization, have been employed to solve the optimization problems. The proposed approaches outperform traditional methods with respect to grade and quality of services.
Author: Paul Hatalsky
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages : 148
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Book Description
Video telephony can deplete network resources and must be carefully managed. This study presents two call admission control (CAC) schemes that improve Layered Multicast Control Protocol (LMCP) with Router Support. The CAC schemes are analyzed with respect to bandwidth utilization, number of calls rejected, and scalability.
Author: Manfred Schneps-Schneppe
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
Call Admission Control in Cellular Networks.
Author: Afif Osseiran
Publisher: Cambridge University Press
ISBN: 1107130093
Category : Computers
Languages : en
Pages : 439
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Book Description
A comprehensive overview of the 5G landscape covering technology options, most likely use cases and potential system architectures.
Author: Ebrahim Abdulrahman Ismail
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Book Description
Author: Novella Bartolini
Publisher:
ISBN:
Category : Cell phone systems
Languages : en
Pages : 27
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Book Description
In this paper, a non-preemptive prioritization scheme for access control in cellular networks is analyzed. The research for the best call admission policy is carried out by means of a Markov Decision Process (MDP) which allows us to study a very wide class of policies which includes some well known pure stationary policies, as well as randomized ones. The proposed model explicitly incorporates the dependency between the hand-off rate and the system state, assuming that the hand-off rate arriving to a cell is proportional to the occupancy level of the adjacent cells. The cutoff priority policy, consisting in reserving a certain number of channels to the high priority stream of requests, is proved to be optimal within this class while using an objective function in the form of a linear combination of some quality of service parameters, when no queueing device is considered. Numerical results confirm the optimality of the cutoff priority policy when queueing of hand-off requests is allowed.
Author: Lily Cheng
Publisher:
ISBN:
Category : Asynchronous transfer mode
Languages : en
Pages : 326
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Book Description
Author: Khalil Ibrahimi
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
Call Admission Control Algorithms Based on Random Waypoint Mobility for IEEE802.16e Networks.
Author: John Ireneusz Siwko
Publisher:
ISBN:
Category :
Languages : en
Pages : 276
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Book Description
Author: Jay Kelley
Publisher: John Wiley & Sons
ISBN: 0470501340
Category : Computers
Languages : en
Pages : 340
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Book Description
Network access control (NAC) is how you manage network security when your employees, partners, and guests need to access your network using laptops and mobile devices. Network Access Control For Dummies is where you learn how NAC works, how to implement a program, and how to take real-world challenges in stride. You’ll learn how to deploy and maintain NAC in your environment, identify and apply NAC standards, and extend NAC for greater network security. Along the way you’ll become familiar with what NAC is (and what it isn’t) as well as the key business drivers for deploying NAC. Learn the steps of assessing, evaluating, remediating, enforcing, and monitoring your program Understand the essential functions of Authentication, Authorization, and Accounting Decide on the best NAC approach for your organization and which NAC policies are appropriate Discover how to set policies that are enforceable and reasonable enough to be followed, yet still effective Become familiar with the architectures and standards essential to NAC Involve and motivate everyone in the organization whose support is critical to a successful implementation Network Access Control For Dummies shows you the steps for planning your implementation, who should be involved, where enforcement should occur, and much more. When you flip the switch, you’ll know what to expect.
