The Experts below are selected from a list of 7404 Experts worldwide ranked by ideXlab platform
Yi Fei Tan - One of the best experts on this subject based on the ideXlab platform.
-
QoS-based radio Network Dimensioning for LTE Networks with heavy real-time traffic
International Journal of Communication Systems, 2012Co-Authors: Teong Chee Chuah, Yi Fei TanAbstract:Applications of video streaming and real-time gaming, which generate large amounts of real-time traffic in the Network, are expected to gain considerable popularity in Long Term Evolution Networks. Maintaining the QoS such as packet delay, packet loss ratio, median, and cell border throughput requirements in Networks dominated by real time traffic, is critical. The existing Dimensioning methodology does not consider QoS parameters of real-time traffic in Network Dimensioning. Moreover, exhaustive and time-consuming simulations are normally required to evaluate the performance and QoS of real-time services. To overcome this problem, we propose an improved radio Network Dimensioning framework that considers the QoS of real-time traffic in Network Dimensioning. In this framework, an analytical model is proposed to evaluate the capacity and performance of real-time traffic dominant Long Term Evolution Networks. The proposed framework provides a fast and accurate means of finding the trade-off between system load, packet delay, packet loss ratio, required median, and cell border throughput. It also provides Network operators with an analytical means for obtaining the minimum number of sites required by jointly considering coverage, capacity and QoS requirements. The accuracy of the proposed model is validated through simulations. Copyright © 2012 John Wiley & Sons, Ltd.
-
QoS-based radio Network Dimensioning for LTE Networks with heavy real-time traffic
International Journal of Communication Systems, 2012Co-Authors: Teong Chee Chuah, Yi Fei TanAbstract:Applications of video streaming and real-time gaming, which generate large amounts of real-time traffic in the Network, are expected to gain considerable popularity in Long Term Evolution Networks. Maintaining the QoS such as packet delay, packet loss ratio, median, and cell border throughput requirements in Networks dominated by real time traffic, is critical. The existing Dimensioning methodology does not consider QoS parameters of real-time traffic in Network Dimensioning. Moreover, exhaustive and time-consuming simulations are normally required to evaluate the performance and QoS of real-time services. To overcome this problem, we propose an improved radio Network Dimensioning framework that considers the QoS of real-time traffic in Network Dimensioning. In this framework, an analytical model is proposed to evaluate the capacity and performance of real-time traffic dominant Long Term Evolution Networks. The proposed framework provides a fast and accurate means of finding the trade-off between system load, packet delay, packet loss ratio, required median, and cell border throughput. It also provides Network operators with an analytical means for obtaining the minimum number of sites required by jointly considering coverage, capacity and QoS requirements. The accuracy of the proposed model is validated through simulations
-
Improved Multiple-Scenario Radio Network Dimensioning for WCDMA
International Journal of Communications Network and System Sciences, 2012Co-Authors: Teong Chee Chuah, Yi Fei TanAbstract:In wideband code division multiple access (WCDMA) cellular systems, the coverage radius of a cell depends on its current capacity level. As a result, existing WCDMA radio Network Dimensioning approaches require that coverage and capacity planning be carried out jointly in an iterative manner in order to obtain the minimum site count needed while fulfilling both coverage and capacity requirements. This requires relatively long computational time, particularly when there are many scenarios or what-if cases to be considered. To overcome this problem, we propose an alternative radio Network Dimensioning approach where coverage planning and capacity planning can be carried out separately to reduce computational time. Besides, a portion of the values calculated in the initial iteration is preserved in a lookup graph, allowing future what-if analysis to be accomplished rapidly. Simulation results show that, unlike the existing approach, the planning and what-if analysis times of the proposed Dimensioning approach are independent of the number of sce-narios considered. Lastly, we present a few case studies and show that the proposed Dimensioning method can give the same prediction accuracy as the existing method.
-
Improved Radio Network Dimensioning for Real-Time Polling Service on IEEE 802.16 Wireless Networks with QoS Consideration
International Journal of Communications Network and System Sciences, 2012Co-Authors: Teong Chee Chuah, Yi Fei TanAbstract:Recently, applications of real-time polling service (rtPS) in IEEE 802.16 wireless Networks have gained considerable popularity. These applications generate large amounts of real time traffic in the Network and thus maintaining the quality of service (QoS) such as packet delay requirement in rtPS dominant Networks is critical. Existing Dimensioning methodology does not consider QoS parameters of rtPS in Network Dimensioning. Moreover, exhaustive and time-consuming simulations are required to evaluate the performance and QoS of rtPS. To overcome this problem, we propose an improved radio Network Dimensioning framework which considers QoS parameters of rtPS in Network Dimensioning. In this framework, an analytical model is developed to evaluate the capacity and performance of rtPS in IEEE 802.16 wireless Networks. The proposed framework provides a fast and accurate means of finding the trade-off between system load and packet delay, thus providing Network operators with an analytical tool that jointly considers coverage, capacity and QoS requirements for obtaining the minimum number of sites required. The accuracy of the proposed model is validated through simulations.
T. Terahara - One of the best experts on this subject based on the ideXlab platform.
-
hybrid link path based design for translucent photonic Network Dimensioning
Journal of Lightwave Technology, 2007Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. TeraharaAbstract:The advancement of ultralong-haul transmission technology has dramatically enhanced the all-optical reaches. However, the actual situations of installed fiber and sites for terrestrial Network often prevent implementing a purely transparent Network, and thus, opaque reshaping retiming regenerating (3R) regeneration is required to guarantee optical signal reachability. Since 3R regenerators based on optical/electrical/optical conversion tend to dominate the total Network costs, an efficient Network design method that allocates a minimum number of 3R regenerators to optimum locations is essential to build a cost-effective photonic Network. In this paper, we propose such a Network-Dimensioning method by combining the advantages of link-based and path-based design approaches. It first guarantees optical signal reachability for any possible traffic demand in each segmented linear link. After combining all the links, excessive regenerators are eliminated based on the optical signal quality check with -factor calculation for each wavelength path. A trial design of a large-scale mesh Network demonstrated a significant cost savings of more than 30% in comparison with a conventional link-based design. In the trial, the impact of fiber loss coefficient over the total Network cost was investigated quantitatively, addressing the importance of such quantitative modeling and analysis.
-
Hybrid Link/Path-Based Design for Translucent Photonic Network Dimensioning
Journal of Lightwave Technology, 2007Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. TeraharaAbstract:The advancement of ultralong-haul transmission technology has dramatically enhanced the all-optical reaches. However, the actual situations of installed fiber and sites for terrestrial Network often prevent implementing a purely transparent Network, and thus, opaque reshaping retiming regenerating (3R) regeneration is required to guarantee optical signal reachability. Since 3R regenerators based on optical/electrical/optical conversion tend to dominate the total Network costs, an efficient Network design method that allocates a minimum number of 3R regenerators to optimum locations is essential to build a cost-effective photonic Network. In this paper, we propose such a Network-Dimensioning method by combining the advantages of link-based and path-based design approaches. It first guarantees optical signal reachability for any possible traffic demand in each segmented linear link. After combining all the links, excessive regenerators are eliminated based on the optical signal quality check with -factor calculation for each wavelength path. A trial design of a large-scale mesh Network demonstrated a significant cost savings of more than 30% in comparison with a conventional link-based design. In the trial, the impact of fiber loss coefficient over the total Network cost was investigated quantitatively, addressing the importance of such quantitative modeling and analysis.
-
Translucent photonic Network Dimensioning for equipment cost minimization
2004Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. Terahara, Masatake Miyabe, N. NakayamaAbstract:Network design method is proposed by combining advantages of link-based and path-based approaches. A trial design incorporating precise optical characteristics modeling showed 30% cost reduction while guaranteeing optical signal reachability for any possible traffic demands.
Elias Yaacoub - One of the best experts on this subject based on the ideXlab platform.
-
tutorial on lte lte a cellular Network Dimensioning using iterative statistical analysis
IEEE Communications Surveys and Tutorials, 2016Co-Authors: Mona Jaber, Naeem Akl, Zaher Dawy, Elias YaacoubAbstract:LTE is the fastest growing cellular technology and is expected to increase its footprint in the coming years, as well as progress toward LTE-A. The race among operators to deliver the expected quality of experience to their users is tight and demands sophisticated skills in Network planning. Radio Network Dimensioning (RND) is an essential step in the process of Network planning and has been used as a fast, but indicative, approximation of radio site count. RND is a prerequisite to the lengthy process of thorough planning. Moreover, results from RND are used by players in the industry to estimate preplanning costs of deploying and running a Network; thus, RND is, as well, a key tool in cellular business modelling. In this work, we present a tutorial on radio Network Dimensioning, focused on LTE/LTE-A, using an iterative approach to find a balanced design that mediates among the three design requirements: coverage, capacity, and quality. This approach uses a statistical link budget analysis methodology, which jointly accounts for small and large scale fading in the channel, as well as loading due to traffic demand, in the interference calculation. A complete RND manual is thus presented, which is of key importance to operators deploying or upgrading LTE/LTE-A Networks for two reasons. It is purely analytical, hence it enables fast results, a prime factor in the race undertaken. Moreover, it captures essential variables affecting Network dimensions and manages conflicting targets to ensure user quality of experience, another major criterion in the competition. The described approach is compared to the traditional RND using a commercial LTE Network planning tool. The outcome further dismisses the traditional RND for LTE due to unjustified increase in number of radio sites and related cost, and motivates further research in developing more effective and novel RND procedures.
-
Tutorial on LTE/LTE-A Cellular Network Dimensioning Using Iterative Statistical Analysis
IEEE Communications Surveys & Tutorials, 2016Co-Authors: Mona Jaber, Naeem Akl, Zaher Dawy, Elias YaacoubAbstract:LTE is the fastest growing cellular technology and is expected to increase its footprint in the coming years, as well as progress toward LTE-A. The race among operators to deliver the expected quality of experience to their users is tight and demands sophisticated skills in Network planning. Radio Network Dimensioning (RND) is an essential step in the process of Network planning and has been used as a fast, but indicative, approximation of radio site count. RND is a prerequisite to the lengthy process of thorough planning. Moreover, results from RND are used by players in the industry to estimate preplanning costs of deploying and running a Network; thus, RND is, as well, a key tool in cellular business modelling. In this work, we present a tutorial on radio Network Dimensioning, focused on LTE/LTE-A, using an iterative approach to find a balanced design that mediates among the three design requirements: coverage, capacity, and quality. This approach uses a statistical link budget analysis methodology, which jointly accounts for small and large scale fading in the channel, as well as loading due to traffic demand, in the interference calculation. A complete RND manual is thus presented, which is of key importance to operators deploying or upgrading LTE/LTE-A Networks for two reasons. It is purely analytical, hence it enables fast results, a prime factor in the race undertaken. Moreover, it captures essential variables affecting Network dimensions and manages conflicting targets to ensure user quality of experience, another major criterion in the competition. The described approach is compared to the traditional RND using a commercial LTE Network planning tool. The outcome further dismisses the traditional RND for LTE due to unjustified increase in number of radio sites and related cost, and motivates further research in developing more effective and novel RND procedures.
-
statistical link budget analysis approach for lte cellular Network Dimensioning
European Wireless Conference, 2014Co-Authors: Mona Jaber, Naeem Akl, Zaher Dawy, Elias YaacoubAbstract:Radio Network Dimensioning is an essential step towards designing a cellular Network and has traditionally relied on a pragmatic approach to capture the effects of fading and shadowing on the system interference. However, with the increased flexibility of LTE which builds on the statistical variation of wireless channels by adapting resources accordingly, there is a need for new customized dynamic Dimensioning methods. The main contribution in this paper is a statistical approach to link budget analysis for LTE that jointly accounts for fading and shadowing in the channel as well as loading due to traffic demand in the interference calculation. Derivations of probability density functions (PDF) of three Dimensioning parameters: interference margin, maximum allowed path loss and cell range are first presented. The PDF's are then validated and used in different scenarios to capture the tradeoff trends between coverage, capacity and quality of service constraints in LTE. Finally, cellular Network Dimensioning insights and guidelines are discussed based on the obtained results.
Artur Tomaszewski - One of the best experts on this subject based on the ideXlab platform.
-
An optimization model for robust FSO Network Dimensioning
Optical Switching and Networking, 2019Co-Authors: Dritan Nace, Michał Pióro, Michael Poss, Fabio D’andreagiovanni, Ilya Kalesnikau, Marinela Shehaj, Artur TomaszewskiAbstract:FSO (Free Space Optics) is a well established wireless optical transmission technology considered as an alternative to radio communications, for example in metropolitan wireless mesh Networks. An FSO link is established by means of a laser beam connecting the transmitter and the receiver placed in the line of sight. A major disadvantage of FSO links (with respect to fiber links) is their sensitivity to weather conditions such as fog, rain and snow, causing substantial loss of the transmission power over the optical channel due mostly to absorption and scattering. Thus, although the FSO technology allows for fast and low-cost deployment of broadband Networks, its operation will be affected by this sensitivity, manifested by substantial losses in links' transmission capacity with respect to the nominal capacity. Therefore, a proper approach to FSO Network Dimensioning should take such losses into account so that the level of carried traffic is satisfactory under all observed weather conditions. In the paper we describe such an approach. We introduce a relevant Dimensioning problem and present a robust optimization algorithm for such enhanced Dimensioning. A substantial part of the paper is devoted to present a numerical study of two FSO Network instances that illustrates the promising effectiveness of the proposed approach.
-
on robust fso Network Dimensioning
2017 9th International Workshop on Resilient Networks Design and Modeling (RNDM), 2017Co-Authors: Fabio Dandreagiovanni, Dritan Nace, Michał Pióro, Marinela Shehaj, Michael Foss, Artur TomaszewskiAbstract:The presented work is motivated by Free Space Optics (FSO) communications. FSO is a well established wireless optical transmission technology considered as an alternative to radio communications for example in metropolitan wireless mesh Networks. An FSO link is established by means of a laser beam between the transmitter and the receiver placed in the line of sight. A major disadvantage of FSO links (with respect to fiber links) is their sensitivity to weather conditions such as fog, rain and snow, causing substantial loss of the optical transmission power over the channel due mostly to absorption and scattering. Although the FSO technology allows for a fast and low-cost deployment of broadband Networks, its operation will be affected by vulnerability of the link transmissions to weather conditions that can be manifested by substantial losses in links' transmission capacity with respect to the nominal capacity. Therefore, proper Dimensioning of an FSO Network should take such losses into account so that the level of carried traffic is satisfactory under all observed weather conditions. In the paper we introduce and study an optimization problem for such enhanced Dimensioning using the robust optimization approach.
-
RNDM - On robust FSO Network Dimensioning
2017 9th International Workshop on Resilient Networks Design and Modeling (RNDM), 2017Co-Authors: Fabio D'andreagiovanni, Dritan Nace, Michał Pióro, Marinela Shehaj, Michael Foss, Artur TomaszewskiAbstract:The presented work is motivated by Free Space Optics (FSO) communications. FSO is a well established wireless optical transmission technology considered as an alternative to radio communications for example in metropolitan wireless mesh Networks. An FSO link is established by means of a laser beam between the transmitter and the receiver placed in the line of sight. A major disadvantage of FSO links (with respect to fiber links) is their sensitivity to weather conditions such as fog, rain and snow, causing substantial loss of the optical transmission power over the channel due mostly to absorption and scattering. Although the FSO technology allows for a fast and low-cost deployment of broadband Networks, its operation will be affected by vulnerability of the link transmissions to weather conditions that can be manifested by substantial losses in links' transmission capacity with respect to the nominal capacity. Therefore, proper Dimensioning of an FSO Network should take such losses into account so that the level of carried traffic is satisfactory under all observed weather conditions. In the paper we introduce and study an optimization problem for such enhanced Dimensioning using the robust optimization approach.
Norihiko Shinomiya - One of the best experts on this subject based on the ideXlab platform.
-
hybrid link path based design for translucent photonic Network Dimensioning
Journal of Lightwave Technology, 2007Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. TeraharaAbstract:The advancement of ultralong-haul transmission technology has dramatically enhanced the all-optical reaches. However, the actual situations of installed fiber and sites for terrestrial Network often prevent implementing a purely transparent Network, and thus, opaque reshaping retiming regenerating (3R) regeneration is required to guarantee optical signal reachability. Since 3R regenerators based on optical/electrical/optical conversion tend to dominate the total Network costs, an efficient Network design method that allocates a minimum number of 3R regenerators to optimum locations is essential to build a cost-effective photonic Network. In this paper, we propose such a Network-Dimensioning method by combining the advantages of link-based and path-based design approaches. It first guarantees optical signal reachability for any possible traffic demand in each segmented linear link. After combining all the links, excessive regenerators are eliminated based on the optical signal quality check with -factor calculation for each wavelength path. A trial design of a large-scale mesh Network demonstrated a significant cost savings of more than 30% in comparison with a conventional link-based design. In the trial, the impact of fiber loss coefficient over the total Network cost was investigated quantitatively, addressing the importance of such quantitative modeling and analysis.
-
Hybrid Link/Path-Based Design for Translucent Photonic Network Dimensioning
Journal of Lightwave Technology, 2007Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. TeraharaAbstract:The advancement of ultralong-haul transmission technology has dramatically enhanced the all-optical reaches. However, the actual situations of installed fiber and sites for terrestrial Network often prevent implementing a purely transparent Network, and thus, opaque reshaping retiming regenerating (3R) regeneration is required to guarantee optical signal reachability. Since 3R regenerators based on optical/electrical/optical conversion tend to dominate the total Network costs, an efficient Network design method that allocates a minimum number of 3R regenerators to optimum locations is essential to build a cost-effective photonic Network. In this paper, we propose such a Network-Dimensioning method by combining the advantages of link-based and path-based design approaches. It first guarantees optical signal reachability for any possible traffic demand in each segmented linear link. After combining all the links, excessive regenerators are eliminated based on the optical signal quality check with -factor calculation for each wavelength path. A trial design of a large-scale mesh Network demonstrated a significant cost savings of more than 30% in comparison with a conventional link-based design. In the trial, the impact of fiber loss coefficient over the total Network cost was investigated quantitatively, addressing the importance of such quantitative modeling and analysis.
-
Translucent photonic Network Dimensioning for equipment cost minimization
2004Co-Authors: Norihiko Shinomiya, Takeshi Hoshida, Yuichi Akiyama, Hisao Nakashima, T. Terahara, Masatake Miyabe, N. NakayamaAbstract:Network design method is proposed by combining advantages of link-based and path-based approaches. A trial design incorporating precise optical characteristics modeling showed 30% cost reduction while guaranteeing optical signal reachability for any possible traffic demands.