This paper treats BWA (Broadband Wireless Access) implementation in TK (Telecom of Kosova) NGN network in its efforts to keep the leading position in Kosovapsilas competitive telecommunication market. At the beginning, the architecture of TK NGN network with its corresponding elements is described. Such standard-based, open architecture core network enables the integration of Voice and Multimedia services on a single network infrastructure. Along with first and second phase of core network implementation, TK has analyzed the technical and commercial feasibility of implementation of Broadband Wireless Access as a fastest way to satisfy the growing demands for broadband and voice services in un served and rural areas. The choice of IEEE 802.16, commonly known as WiMAX, proved to be one of the best solutions for that purpose. At the end the implementation of WiMAX in TK NGN is presented showing all advantages of the chosen solution such as high bandwidth, adaptive modulation and coding, fits in of all IP architecture, QoS, security, support of different duplex techniques, etc.
{"title":"Broadband Wireless Access (BWA) Implementation in NGN Network","authors":"B. Shatri, I. Imeri, A. Maraj","doi":"10.1109/CTRQ.2008.24","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.24","url":null,"abstract":"This paper treats BWA (Broadband Wireless Access) implementation in TK (Telecom of Kosova) NGN network in its efforts to keep the leading position in Kosovapsilas competitive telecommunication market. At the beginning, the architecture of TK NGN network with its corresponding elements is described. Such standard-based, open architecture core network enables the integration of Voice and Multimedia services on a single network infrastructure. Along with first and second phase of core network implementation, TK has analyzed the technical and commercial feasibility of implementation of Broadband Wireless Access as a fastest way to satisfy the growing demands for broadband and voice services in un served and rural areas. The choice of IEEE 802.16, commonly known as WiMAX, proved to be one of the best solutions for that purpose. At the end the implementation of WiMAX in TK NGN is presented showing all advantages of the chosen solution such as high bandwidth, adaptive modulation and coding, fits in of all IP architecture, QoS, security, support of different duplex techniques, etc.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115456644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this research, the performance evaluation of two class priority Delta Multistage Interconnection Networks (MINs) is analyzed, using a discrete priority queuing model. All Delta Networks are constructed by special switching elements (SEs) based on an architecture which natively supports two classes of routing traffic. The proposed analytical method which was developed for performance metrics investigation can be applied on any class of Banyan Switches, because the model is independent from their internal link permutations, providing results for all intermediate stages. The analytical method was validated by simulation experiments and the obtained results in the marginal cases of single priority MINs were found to be more accurate as compared with those of three older classic models.The proposed architecture of Delta Networks which have been thoroughly analyzed by our analytical model can be useful in the study and development of communication links that support both voice and data traffic co instantaneously, with good quality of service.
{"title":"Analytical Model for Performance Evaluation of Blocking Banyan Switches Supporting Double Priority Traffic","authors":"John Garofalakis, E. Stergiou","doi":"10.1109/CTRQ.2008.8","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.8","url":null,"abstract":"In this research, the performance evaluation of two class priority Delta Multistage Interconnection Networks (MINs) is analyzed, using a discrete priority queuing model. All Delta Networks are constructed by special switching elements (SEs) based on an architecture which natively supports two classes of routing traffic. The proposed analytical method which was developed for performance metrics investigation can be applied on any class of Banyan Switches, because the model is independent from their internal link permutations, providing results for all intermediate stages. The analytical method was validated by simulation experiments and the obtained results in the marginal cases of single priority MINs were found to be more accurate as compared with those of three older classic models.The proposed architecture of Delta Networks which have been thoroughly analyzed by our analytical model can be useful in the study and development of communication links that support both voice and data traffic co instantaneously, with good quality of service.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114545238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, we investigate the correlation between security and spatial resolution -a measure of service quality- in cluster-based wireless sensor networks (WSN). We analyze the tradeoff between these two concepts resulting from the limited channel capacity. We propose a method based on combinatorial optimization to determine the best tradeoff between security and spatial resolution for cases where network capacity is not sufficient to support required levels. The proposed method involves formulation of an optimization problem by utility maximizing approach and its solution by a heuristic algorithm providing minimal operational complexity. We also present some numerical results obtained by application of the proposed method to a sample sensor network. The numerical results demonstrate the effect of utility function parameters on the optimal solution.
{"title":"Security and Spatial Resolution Optimization for Cluster-Based Wireless Sensor Networks","authors":"E. Tomur, Y. M. Erten","doi":"10.1109/CTRQ.2008.23","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.23","url":null,"abstract":"In this study, we investigate the correlation between security and spatial resolution -a measure of service quality- in cluster-based wireless sensor networks (WSN). We analyze the tradeoff between these two concepts resulting from the limited channel capacity. We propose a method based on combinatorial optimization to determine the best tradeoff between security and spatial resolution for cases where network capacity is not sufficient to support required levels. The proposed method involves formulation of an optimization problem by utility maximizing approach and its solution by a heuristic algorithm providing minimal operational complexity. We also present some numerical results obtained by application of the proposed method to a sample sensor network. The numerical results demonstrate the effect of utility function parameters on the optimal solution.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131360499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As communication becomes more and more an integral part of our day to day lives, so our need to access information increases as well. Mobility is currently one of the most important factors to consider in our aim to achieve ubiquitous computing, and with it raises the problem of how to manipulate data while maintaining consistency and integrity. Recent years have seen tremendous interest in quorum systems adapted to mobile hosts; however, the more recent topic, of studying the effects of mobile networks on quorum systems, has also been the focus of interest for building quorums aware of their network surroundings. This paper presents a novel approach in selecting mobile hosts to form epidemic quorum coteries, based on metrics measured by mobile hosts and then transmitted to base station servers, which maintain a vigil on the state of these mobile hosts to provide higher quorum availability and ultimately higher data accessibility, better integrity and consistency.
{"title":"An Improved Quorum Selection Algorithm","authors":"S. Younes, R. Haraty","doi":"10.1109/CTRQ.2008.14","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.14","url":null,"abstract":"As communication becomes more and more an integral part of our day to day lives, so our need to access information increases as well. Mobility is currently one of the most important factors to consider in our aim to achieve ubiquitous computing, and with it raises the problem of how to manipulate data while maintaining consistency and integrity. Recent years have seen tremendous interest in quorum systems adapted to mobile hosts; however, the more recent topic, of studying the effects of mobile networks on quorum systems, has also been the focus of interest for building quorums aware of their network surroundings. This paper presents a novel approach in selecting mobile hosts to form epidemic quorum coteries, based on metrics measured by mobile hosts and then transmitted to base station servers, which maintain a vigil on the state of these mobile hosts to provide higher quorum availability and ultimately higher data accessibility, better integrity and consistency.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133658895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recently, there have been many efforts to develop wireless sensor networks (WSN), but no one can deny the fact that QoS support is still one of the least explored areas in this domain. In this paper, we present QoS support in WSN while highlighting the QoS mapping issue, a complex process in which QoS parameters are translated from level to level and we present a case study of a TDMA tree-based clustered WSN, where accuracy and density on the user level are mapped to bandwidth on the network level.
{"title":"QoS Mapping in TDMA Tree Based Clustered WSN between Accuracy, Density and Bandwidth","authors":"W. Masri, Z. Mammeri","doi":"10.1109/CTRQ.2008.9","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.9","url":null,"abstract":"Recently, there have been many efforts to develop wireless sensor networks (WSN), but no one can deny the fact that QoS support is still one of the least explored areas in this domain. In this paper, we present QoS support in WSN while highlighting the QoS mapping issue, a complex process in which QoS parameters are translated from level to level and we present a case study of a TDMA tree-based clustered WSN, where accuracy and density on the user level are mapped to bandwidth on the network level.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122282079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent research has shown the link between congestion control in communication networks and feedback control system. In this paper, the design of an active queue management (AQM) which can be viewed as a controller, is considered. Based on a state space representation of a linearized fluid flow model of TCP, the AQM design is converted to a state feedback synthesis problem for time delay systems. Finally, an example extracted from the literature and simulations via a network simulator NS (under cross traffic conditions) support our study.
{"title":"Design and Performance Evaluation of a State-Space Based AQM","authors":"Yassine Ariba, Y. Labit, F. Gouaisbaut","doi":"10.1109/CTRQ.2008.15","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.15","url":null,"abstract":"Recent research has shown the link between congestion control in communication networks and feedback control system. In this paper, the design of an active queue management (AQM) which can be viewed as a controller, is considered. Based on a state space representation of a linearized fluid flow model of TCP, the AQM design is converted to a state feedback synthesis problem for time delay systems. Finally, an example extracted from the literature and simulations via a network simulator NS (under cross traffic conditions) support our study.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126823997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Multimedia and real-time applications require bandwidth guarantees, which may be achieved by resource reservation. However, resource reservation in ad-hoc networks is a very challenging task due to the instability of radio channels, nodes mobility and lack of coordination between mobile nodes. Previously proposed reservation MAC protocols like CATA, FPRP and R-CSMA have limitations. They consider that nodes are static and no mobility considerations are taken into account. In this paper, we propose a distributed reservation MAC protocol called Extended R-CSMA (ER-CSMA) to efficiently handle network topology changes due to nodes mobility. We achieved intensive simulations using the NS simulator to evaluate the effectiveness of our protocol. Performance evaluations show that our protocol outperforms the other protocols in terms of throughput and dropping rate.
{"title":"Reservation Clash Handling to Optimize Bandwidth Utilization in MANETs","authors":"G. Boudour, C. Teyssié, Z. Mammeri","doi":"10.1109/CTRQ.2008.10","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.10","url":null,"abstract":"Multimedia and real-time applications require bandwidth guarantees, which may be achieved by resource reservation. However, resource reservation in ad-hoc networks is a very challenging task due to the instability of radio channels, nodes mobility and lack of coordination between mobile nodes. Previously proposed reservation MAC protocols like CATA, FPRP and R-CSMA have limitations. They consider that nodes are static and no mobility considerations are taken into account. In this paper, we propose a distributed reservation MAC protocol called Extended R-CSMA (ER-CSMA) to efficiently handle network topology changes due to nodes mobility. We achieved intensive simulations using the NS simulator to evaluate the effectiveness of our protocol. Performance evaluations show that our protocol outperforms the other protocols in terms of throughput and dropping rate.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128237099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an approach that aims to provide quality of services (QoS) over heterogeneous Internet domains. The goal is to install and to manage QoS inside each domain and to ensure it on the end to end data path. QoS is a key requirement representing a significant infrastructure upgrade for future networks. Our proposal relies on the multi-service, multi-technology model based on Bandwidth Broker, entity in charge of controlling a given domain. It introduces a concept able to provide QoS in a set of domains using an inter domain signaling protocol. This protocol is used to communicate between Bandwidth Brokers and is independent of the intra-domain routing protocol. Moreover it is independent of the underlying technology and imposes minimal constraints leaving a maximum degree of freedom for users and domains providers to implement specific internal solutions.
{"title":"Quality of Service Management in Heterogeneous Networks","authors":"F. Racaru, M. Diaz, C. Chassot","doi":"10.1109/CTRQ.2008.20","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.20","url":null,"abstract":"This paper presents an approach that aims to provide quality of services (QoS) over heterogeneous Internet domains. The goal is to install and to manage QoS inside each domain and to ensure it on the end to end data path. QoS is a key requirement representing a significant infrastructure upgrade for future networks. Our proposal relies on the multi-service, multi-technology model based on Bandwidth Broker, entity in charge of controlling a given domain. It introduces a concept able to provide QoS in a set of domains using an inter domain signaling protocol. This protocol is used to communicate between Bandwidth Brokers and is independent of the intra-domain routing protocol. Moreover it is independent of the underlying technology and imposes minimal constraints leaving a maximum degree of freedom for users and domains providers to implement specific internal solutions.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122283559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Development of multimedia services, e.g. video on demand or IPTV and their flow transport over the IP multi-domain networks with quality of services (QoS) guarantees require appropriate management and control of QoS at service and also at the network level. The management and control system must first support cooperation between several independent network domains at service provisioning level while preserving independency of each domain at resource control level. Secondly, the system should integrate various low level mechanisms like QoS routing, resource reservation, admission control. Service Level Agreements and Specifications are used to express inter-entities commitments. This paper presents a web-service approach for implementing the inter-domain SLS negotiation process between network providers (pSLS). The solution is part of an end to end QoS integrated management system through heterogeneous networks defined by the ENTHRONE IST European project.
{"title":"Web-Service Solution for Inter-domain QoS Negotiation","authors":"S. Obreja, E. Borcoci, R. Lupu, Radu Iorga","doi":"10.1109/CTRQ.2008.21","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.21","url":null,"abstract":"Development of multimedia services, e.g. video on demand or IPTV and their flow transport over the IP multi-domain networks with quality of services (QoS) guarantees require appropriate management and control of QoS at service and also at the network level. The management and control system must first support cooperation between several independent network domains at service provisioning level while preserving independency of each domain at resource control level. Secondly, the system should integrate various low level mechanisms like QoS routing, resource reservation, admission control. Service Level Agreements and Specifications are used to express inter-entities commitments. This paper presents a web-service approach for implementing the inter-domain SLS negotiation process between network providers (pSLS). The solution is part of an end to end QoS integrated management system through heterogeneous networks defined by the ENTHRONE IST European project.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126796073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, we propose a new end-point admission control algorithm which helps to manage the traffic efficiently while providing end-to-end service quality. In this algorithm, users are allowed to temporarily use lower service levels in the routers that the requested service level is not currently available. This local degradation preserves the end-to-end service quality in the acceptable level. It may also degrade the end-to-end service level but only if it is acceptable by the application. This degradation may be temporary until the required quality level becomes available. In this way, we can increase the data throughput and also the percentage of admitted calls, which results in higher network utilization. The drawback of this method is the increase in end-to-end delay but this increase can be limited by using appropriate final route selection method at the destination node.
{"title":"A New Endpoint Admission Control Algorithm in NGN with Improved Network Utilization","authors":"Neda Moghim, S. M. Safavi, Masoud Hashemi","doi":"10.1109/CTRQ.2008.22","DOIUrl":"https://doi.org/10.1109/CTRQ.2008.22","url":null,"abstract":"In this paper, we propose a new end-point admission control algorithm which helps to manage the traffic efficiently while providing end-to-end service quality. In this algorithm, users are allowed to temporarily use lower service levels in the routers that the requested service level is not currently available. This local degradation preserves the end-to-end service quality in the acceptable level. It may also degrade the end-to-end service level but only if it is acceptable by the application. This degradation may be temporary until the required quality level becomes available. In this way, we can increase the data throughput and also the percentage of admitted calls, which results in higher network utilization. The drawback of this method is the increase in end-to-end delay but this increase can be limited by using appropriate final route selection method at the destination node.","PeriodicalId":117329,"journal":{"name":"2008 International Conference on Communication Theory, Reliability, and Quality of Service","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127685582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：