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2nd International Conference on Broadband Networks, 2005.最新文献

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Adaptive BCPM downlink resource allocation strategies for multiuser OFDM in cellular systems 蜂窝系统中多用户OFDM的自适应BCPM下行资源分配策略
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589642
N. Damji, T. Le-Ngoc
{"title":"Adaptive BCPM downlink resource allocation strategies for multiuser OFDM in cellular systems","authors":"N. Damji, T. Le-Ngoc","doi":"10.1109/ICBN.2005.1589642","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589642","url":null,"abstract":"This paper presents an adaptive downlink resource allocation strategy for multi-user orthogonal frequency division multiplexing (OFDM) cellular systems, which minimizes first the transmission bandwidth and then the transmission power. By analysis, it is shown that by keeping the minimum numbers of allocated sub-carriers to satisfy user rate requirements, the probability of interference occurrence in the sub-carriers is reduced and improves the expected link outage probability in the presence of flat fading and shadowing. The proposed bandwidth-constrained power minimization (BCPM) problem is formulated as a linear programming problem and used to derive three-step BCPM schemes. Simulation results in a cellular system to support voice and data services in presence of both frequency selective fading and shadowing show that the proposed BCPM schemes outperform the power minimization (PM) in terms of system outage and packet error rate.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911362","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}
引用次数: 5
Opportunistic power allocation for fading channels with non-cooperative users and random access 具有非合作用户和随机接入的衰落信道的机会功率分配
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589639
Jun Sun, E. Modiano
{"title":"Opportunistic power allocation for fading channels with non-cooperative users and random access","authors":"Jun Sun, E. Modiano","doi":"10.1109/ICBN.2005.1589639","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589639","url":null,"abstract":"We present a game-theoretical model of a wireless communication system with multiple competing users sharing a multi-access fading channel. With a specified capture rule and a limited amount of energy available, a user opportunistically adjusts its transmission power based on its own channel state to maximize the user's own individual throughput. We derive an explicit form of the Nash equilibrium power allocation strategy. Furthermore, this Nash equilibrium power allocation strategy is unique under certain capture rule. We also quantify the loss of efficiency in throughput due to user's selfish behavior. Moreover, as the number of users in the system increases, the total system throughput obtained by using a Nash equilibrium strategy approaches the maximum attainable throughput.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115639715","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}
引用次数: 13
Effect of interfering users on the modulation order and code rate for UWB impulse-radio bit-interleaved coded M-ary PPM 干扰用户对UWB脉冲无线电位交错编码M-ary PPM调制顺序和码率的影响
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589738
R. Merz, J.-Y.L. Boudee
{"title":"Effect of interfering users on the modulation order and code rate for UWB impulse-radio bit-interleaved coded M-ary PPM","authors":"R. Merz, J.-Y.L. Boudee","doi":"10.1109/ICBN.2005.1589738","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589738","url":null,"abstract":"We consider the impact of multi-user interference on a bit-interleaved coded-modulation system with M-ary PPM (BIC M-ary PPM) in an impulse-radio ultra-wideband physical layer. In a realistic scenario such as an ad hoc network, the interference is inherently variable. This justifies the need for a physical layer that can optimally adapt its transmission parameters to the interference level. We use puncturing on the channel code so that we can not only change the modulation order M but also the channel code rate. We study by simulation how the optimal combination of modulation order M and channel code rate behaves with various degrees of interference. The results show that BIC M-ary PPM can be successfully adapted to various levels of interference conditions. It also shows the benefit of both rate and modulation adaptation, especially in the presence of multi-user interference","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121669623","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}
引用次数: 2
A dynamic bandwidth reservation scheme for a collision-free time-slotted OBS network 一种无冲突时隙OBS网络的动态带宽预留方案
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589731
Yong Liu, G. Mohan, K. Chua
{"title":"A dynamic bandwidth reservation scheme for a collision-free time-slotted OBS network","authors":"Yong Liu, G. Mohan, K. Chua","doi":"10.1109/ICBN.2005.1589731","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589731","url":null,"abstract":"In this paper, a dynamic bandwidth allocation scheme is proposed to achieve collision free burst transmission in time-slotted OBS networks. Various simulation results show its superior performance over conventional OBS networks with/without wavelength converters. The signaling overhead is also affordable since only few probing, reservation and releasing packets will be sent for each connection in each frame. Some theoretical analysis for the proposed scheme are being under taken","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124980552","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}
引用次数: 5
Architectures for WDM Benes interconnection network with simultaneous space-wavelength switching capability 具有同步空间波长交换能力的WDM Benes互连网络体系结构
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589615
H. Hamza, J. Deogun
{"title":"Architectures for WDM Benes interconnection network with simultaneous space-wavelength switching capability","authors":"H. Hamza, J. Deogun","doi":"10.1109/ICBN.2005.1589615","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589615","url":null,"abstract":"In this paper, we present three switch architectures for WDM (Wavelength Division Multiplexing) Benes network that are based on wavelength exchange optical crossbar (WOC). A WOC is capable of performing a single-step space-switching wavelength-conversion between two wavelengths. A WOC can be implemented by the simultaneous power exchange between two optical signals. Unlike existing designs, the proposed architectures do not require separate stages of wavelength converters. This leads to a switch design that has a smaller total number of components as well as a smaller number of components in the signal path. Moreover, wavelength conversion is performed between two predefined and fixed wavelengths. This avoids the need for expensive full-range wavelength converters used in most of the existing designs. Systematic methods to realize switch architectures with an arbitrary number of wavelengths and fibers are given. The three architectures are evaluated and compared to existing architectures on the basis of hardware cost.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121375701","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}
引用次数: 8
On providing elastic QoS in optical burst switched networks 关于在光突发交换网络中提供弹性QoS的研究
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589623
B. Praveen, J. Praveen, C. Siva Ram Murthy
{"title":"On providing elastic QoS in optical burst switched networks","authors":"B. Praveen, J. Praveen, C. Siva Ram Murthy","doi":"10.1109/ICBN.2005.1589623","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589623","url":null,"abstract":"Integrated services schemes have not been used to support QoS in OBS networks, largely because of the high control overhead involved in monitoring bursts continuously at intermediate nodes. In this paper, we propose for the first time, an integrated services scheme to support elastic QoS in OBS networks. Our scheme relieves intermediate nodes of the burden of monitoring individual bursts continuously, thus largely decreasing the control overhead. We show how absolute bandwidth guarantees can be provided, and how bandwidth used by each connection can be made elastic. We demonstrate the effectiveness of our scheme using simulation studies.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131139990","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}
引用次数: 3
Dynamic converter-aware wavelength assignment in WDM networks with sparse conversion capability 具有稀疏转换能力的WDM网络中动态转换器感知波长分配
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589627
Q. Ho, M. Lee
{"title":"Dynamic converter-aware wavelength assignment in WDM networks with sparse conversion capability","authors":"Q. Ho, M. Lee","doi":"10.1109/ICBN.2005.1589627","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589627","url":null,"abstract":"In wavelength-routed optical networks, wavelength converters are considered as one of the most critical network resources. Unfortunately, previous wavelength assignment algorithms have seldom considered their presence. Therefore, in this paper, we propose a novel dynamic algorithm that can minimize the number of wavelength translations required for each lightpath. Our algorithm establishes a lightpath by chaining a minimum number of wavelength-continuous segments, called lambda-runs. The simulations show that our algorithm performs as well as the existing optimal algorithm while it is very scalable and easy to implement.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128109049","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}
引用次数: 0
On the application of K-center algorithms to hierarchical traffic grooming k -中心算法在分层流量疏导中的应用
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589748
Bensong Chen, R. Dutta, G. Rouskas
{"title":"On the application of K-center algorithms to hierarchical traffic grooming","authors":"Bensong Chen, R. Dutta, G. Rouskas","doi":"10.1109/ICBN.2005.1589748","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589748","url":null,"abstract":"In this paper, we study a clustering technique for the hierarchical traffic grooming approach in WDM mesh networks. The objective is to minimize the cost of electronic ports, as well as the wavelength requirement of the solution. In the hierarchical grooming approach we have presented in previous work, the first phase is to partition a large mesh network into clusters of nodes. The clustering phase is very important for the final grooming result. Various clustering approaches have been considered in literature; however, not all are suitable for traffic grooming application because they do not take grooming goals into account. In this work, we select a suitable existing clustering algorithm, developed for the K-center problem, and study its performance as a clustering algorithm for hierarchical grooming. We then improve the algorithm, adapting it specifically for the traffic grooming problem. Experimental results show that the improved version generally provides better solutions than the original algorithm, on various traffic patterns, for the general topology grooming problem instances","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132578331","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}
引用次数: 17
Physical layer impairments in WDM core networks: a comparison between a North-American backbone and a Pan-European backbone WDM核心网的物理层损伤:北美骨干网和泛欧骨干网的比较
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589754
S. A. Zahr, M. Gagnaire, N. Puech, M. Koubàa
{"title":"Physical layer impairments in WDM core networks: a comparison between a North-American backbone and a Pan-European backbone","authors":"S. A. Zahr, M. Gagnaire, N. Puech, M. Koubàa","doi":"10.1109/ICBN.2005.1589754","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589754","url":null,"abstract":"In the absence of all-optical 3R regenerators, the quality of transmission has a strong impact of the feasibility of all-optical long-haul transmission. Four main physical layer impairments degrade the quality of an optical analog signal, namely chromatic dispersion (CD), polarization mode dispersion (PMD), optical signal to noise ratio (OSNR), and nonlinear phase shift (PhiNL). In most previous studies, a Q factor evaluates the quality of transmission in considering the aforementioned parameters individually (Qi with i isin {1,2,3,4}). In this paper, we propose a tool implementing a global Q factor that takes into account the interaction between the four impairments and from which we derive the bit error rate (BER). This new factor referenced as Q8 enables to study the suitability of optical transparency in transport networks. By means of numerical applications, we compare two backbone networks: the North-American NSF network (NSFNET) and the Pan-European backbone (EBN)","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125698579","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}
引用次数: 25
A wavelength assignment method for distributed wavelength-routed networks using a circular wavelength-list 一种使用圆形波长表的分布式波长路由网络的波长分配方法
2nd International Conference on Broadband Networks, 2005. Pub Date : 2005-10-03 DOI: 10.1109/ICBN.2005.1589632
S. Arakawa, Yosuke Kanitani, M. Murata, K. Kitayama
{"title":"A wavelength assignment method for distributed wavelength-routed networks using a circular wavelength-list","authors":"S. Arakawa, Yosuke Kanitani, M. Murata, K. Kitayama","doi":"10.1109/ICBN.2005.1589632","DOIUrl":"https://doi.org/10.1109/ICBN.2005.1589632","url":null,"abstract":"In a distributed wavelength-routed network, a lightpath request is blocked when its assigned wavelength is already occupied by another lightpath request. Conventional studies assume that a wavelength for the lightpath is selected randomly in the distributed lightpath setup method. However, this random selection method causes unnecessary blocks of lightpath requests, even when the arrival rate of requests is low. In this paper, we develop a novel method for assigning wavelengths, based on the first-fit algorithm. In our proposed method, the intermediate nodes forecast the wavelength that will be selected at the destination node, so that the subsequent lightpath requests avoid the forecasted wavelengths. The forecasted wavelength is thus kept available until the corresponding request reserves it, which prevents wavelength conflicts with other lightpath requests. Computer-simulated performance comparison showed that our method reduces the blocking probability by more than one order of magnitude compared to random selection.","PeriodicalId":113201,"journal":{"name":"2nd International Conference on Broadband Networks, 2005.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125477169","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}
引用次数: 11
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