Chapter Number CAC Algorithms based on Random Waypoint Mobility for IEEE 802 . 16 e Networks, 2009
In this paper we propose the performances reached by two Connection Admission Control algorithms ... more In this paper we propose the performances reached by two Connection Admission Control algorithms for the OFDMA-based IEEE802.16e (WiMAX) network in presence of two types of traffic: Real-Time (RT) and Best-Effort (BE), including Adaptive Modulation and Coding (AMC). We consider intra and inter mobility by using an realistic and general mobility model through the Random Waypoint (RWP) approach. In the first CAC scheme, both RT and BE calls receive the same bit rate independently of the mobile position in the cell. Whereas in the second proposal, only the RT calls receive the same bit rate whatever are the modulation efficiency (i.e. AMC region) whereas the BE calls fairly share the available resources using a Processor Sharing technic. In the same time, we introduce a reserving amount of resources in order to provide an high priority the migrating calls. Furthermore, we develop the system performances based on a continuous time approach and provide extensive numerical examples in term of: throughput, sojourn time, blocking and dropping probabilities.
Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems, 2010
Cognitive radio is an emerging technology in wireless access, aimed at vastly improving the way r... more Cognitive radio is an emerging technology in wireless access, aimed at vastly improving the way radio spectrum is utilized. In this paper, we investigate the performance improvement gained by applying cognitive radio to a multiple Wireless Service Providers (WSPs). We consider several WSPs and two types of flows: classical (CL) and cognitive radio (CR) flows. We propose two admission control
We consider a WCDMA system with two types of calls: real time (RT) calls that have dedicated reso... more We consider a WCDMA system with two types of calls: real time (RT) calls that have dedicated resources, and data on real time (BE) calls (ie best effort) that share system capacity. We consider reservation of some capacity resources for the BE traffic as well as any capacity left over from RT calls. Our analysis approach is based on modeling of the system as a two dimensional Markov chain, where the first correspond to the number of RT calls and the second to the number of BE calls in the system. In order obtain the steady ...
... K. Ibrahimitt, R. EI-Azouzit and EH Bouyakhft t LIA/CERI University of Avignon 339 chemin des... more ... K. Ibrahimitt, R. EI-Azouzit and EH Bouyakhft t LIA/CERI University of Avignon 339 chemin des Meinajaries BP1228, 84911 cedex 9 - Avignon - France Email: {khalil.ibrahimi.rachid.elazouzi}@ univ-avignon.fr +LIMIARF Mohammed V-Agdal University Faculte des sciences, 4 ...
ABSTRACT In this paper we study the capacity of the OFDMA-based IEEE802.16 WiMAX network in the p... more ABSTRACT In this paper we study the capacity of the OFDMA-based IEEE802.16 WiMAX network in the presence of two types of traffic, streaming (Real-Time) and elastic (Non-Real-Time) including Adaptive Modulation and Coding (AMC). Many studies in the literature assumed that packets or calls arrive to the system according to poisson process for the sake of analytical simplicity. However, it has been recently proved that the exponential distribution is inappropriate [2]. Based on the generalized traffic processes developed [2], we study the media access control (MAC) layer of WiMAX and develop a resource allocation that maintain the bit rate of real time connections independently of the user position in the cell. Using Markovian analysis we evaluate the impact of our resource allocation on the non-real time connection (NRT) as expected delay and throughput.
IEEE (NGNS'09) International Conference on Next Generation Networks and Services, Rabat, Morocco, Jun 1, 2009
The next generation network WiMAX (Worldwide Interoperability for Microwave Access), has become s... more The next generation network WiMAX (Worldwide Interoperability for Microwave Access), has become synonymous with the IEEE802. 16 Wireless Metropolitan Area Network (MAN) air interface standard. In its original release the 802.16 standard addressed applications in licensed bands in the 10 to 66 GHz frequency range. Subsequent amendments have extended the 802.16 air interface standard to cover non-line of sight (NLOS) applications in licensed and unlicensed bands from 2 to 11 GHz bands. These 802.16 networks are able ...
Chapter Number CAC Algorithms based on Random Waypoint Mobility for IEEE 802 . 16 e Networks, 2009
In this paper we propose the performances reached by two Connection Admission Control algorithms ... more In this paper we propose the performances reached by two Connection Admission Control algorithms for the OFDMA-based IEEE802.16e (WiMAX) network in presence of two types of traffic: Real-Time (RT) and Best-Effort (BE), including Adaptive Modulation and Coding (AMC). We consider intra and inter mobility by using an realistic and general mobility model through the Random Waypoint (RWP) approach. In the first CAC scheme, both RT and BE calls receive the same bit rate independently of the mobile position in the cell. Whereas in the second proposal, only the RT calls receive the same bit rate whatever are the modulation efficiency (i.e. AMC region) whereas the BE calls fairly share the available resources using a Processor Sharing technic. In the same time, we introduce a reserving amount of resources in order to provide an high priority the migrating calls. Furthermore, we develop the system performances based on a continuous time approach and provide extensive numerical examples in term of: throughput, sojourn time, blocking and dropping probabilities.
Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems, 2010
Cognitive radio is an emerging technology in wireless access, aimed at vastly improving the way r... more Cognitive radio is an emerging technology in wireless access, aimed at vastly improving the way radio spectrum is utilized. In this paper, we investigate the performance improvement gained by applying cognitive radio to a multiple Wireless Service Providers (WSPs). We consider several WSPs and two types of flows: classical (CL) and cognitive radio (CR) flows. We propose two admission control
We consider a WCDMA system with two types of calls: real time (RT) calls that have dedicated reso... more We consider a WCDMA system with two types of calls: real time (RT) calls that have dedicated resources, and data on real time (BE) calls (ie best effort) that share system capacity. We consider reservation of some capacity resources for the BE traffic as well as any capacity left over from RT calls. Our analysis approach is based on modeling of the system as a two dimensional Markov chain, where the first correspond to the number of RT calls and the second to the number of BE calls in the system. In order obtain the steady ...
... K. Ibrahimitt, R. EI-Azouzit and EH Bouyakhft t LIA/CERI University of Avignon 339 chemin des... more ... K. Ibrahimitt, R. EI-Azouzit and EH Bouyakhft t LIA/CERI University of Avignon 339 chemin des Meinajaries BP1228, 84911 cedex 9 - Avignon - France Email: {khalil.ibrahimi.rachid.elazouzi}@ univ-avignon.fr +LIMIARF Mohammed V-Agdal University Faculte des sciences, 4 ...
ABSTRACT In this paper we study the capacity of the OFDMA-based IEEE802.16 WiMAX network in the p... more ABSTRACT In this paper we study the capacity of the OFDMA-based IEEE802.16 WiMAX network in the presence of two types of traffic, streaming (Real-Time) and elastic (Non-Real-Time) including Adaptive Modulation and Coding (AMC). Many studies in the literature assumed that packets or calls arrive to the system according to poisson process for the sake of analytical simplicity. However, it has been recently proved that the exponential distribution is inappropriate [2]. Based on the generalized traffic processes developed [2], we study the media access control (MAC) layer of WiMAX and develop a resource allocation that maintain the bit rate of real time connections independently of the user position in the cell. Using Markovian analysis we evaluate the impact of our resource allocation on the non-real time connection (NRT) as expected delay and throughput.
IEEE (NGNS'09) International Conference on Next Generation Networks and Services, Rabat, Morocco, Jun 1, 2009
The next generation network WiMAX (Worldwide Interoperability for Microwave Access), has become s... more The next generation network WiMAX (Worldwide Interoperability for Microwave Access), has become synonymous with the IEEE802. 16 Wireless Metropolitan Area Network (MAN) air interface standard. In its original release the 802.16 standard addressed applications in licensed bands in the 10 to 66 GHz frequency range. Subsequent amendments have extended the 802.16 air interface standard to cover non-line of sight (NLOS) applications in licensed and unlicensed bands from 2 to 11 GHz bands. These 802.16 networks are able ...
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