Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666563
V. Jain, M. Jain
Ad hoc networks are networks where there is no fixed infrastructure. The mobile nodes are independent and have distributed control. Modeling of ad hoc network is a critical task, which includes modeling of mobile behavior of nodes as well as behavior of wireless links. The mesh connected queuing network can be a good tool to model ad hoc network. In this work we are proposing a novel approach of modeling ad hoc network as a queuing network. The current state of art in modeling mobility in an ad hoc network consists of selecting a velocity and direction for a node and deriving an analytical model based on these parameters. This approach lacks the concept of path and link availability. In our novel approach, data taken from the various mobility scenarios through simulations are used to find out an appropriate distribution that gives connectivity between two nodes. The available and unavailable duration distributions obtained from AdHocSim are incorporated into queuing network. The effect of velocity, area and pause time on link availability are studied and presented. We simulated queuing network in OMNet++. Packet error rate and delay are measured and validated
{"title":"Queuing network model for link and path availability of ad hoc networks","authors":"V. Jain, M. Jain","doi":"10.1109/WOCN.2006.1666563","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666563","url":null,"abstract":"Ad hoc networks are networks where there is no fixed infrastructure. The mobile nodes are independent and have distributed control. Modeling of ad hoc network is a critical task, which includes modeling of mobile behavior of nodes as well as behavior of wireless links. The mesh connected queuing network can be a good tool to model ad hoc network. In this work we are proposing a novel approach of modeling ad hoc network as a queuing network. The current state of art in modeling mobility in an ad hoc network consists of selecting a velocity and direction for a node and deriving an analytical model based on these parameters. This approach lacks the concept of path and link availability. In our novel approach, data taken from the various mobility scenarios through simulations are used to find out an appropriate distribution that gives connectivity between two nodes. The available and unavailable duration distributions obtained from AdHocSim are incorporated into queuing network. The effect of velocity, area and pause time on link availability are studied and presented. We simulated queuing network in OMNet++. Packet error rate and delay are measured and validated","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116654917","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666568
J. Abraham, K. Ramanatha
This paper proposes an efficient protocol for authentication and shared key establishment in hierarchical clustered wireless sensor networks. The protocol authenticates a source node to a base station, designates a cluster head to each authenticated source node and establishes shared keys between source node and the base station as well as with the cluster head. The above tasks are accomplished in a single step to reduce the required channel capacities. The protocol is implemented for TinyOS using NesC, simulated under TOSSIM and is viable for implementation in resource-constrained platforms like MICA. The security analysis shows that this protocol could withstand several possible attacks in the network
{"title":"An efficient protocol for authentication and initial shared key establishment in clustered wireless sensor networks","authors":"J. Abraham, K. Ramanatha","doi":"10.1109/WOCN.2006.1666568","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666568","url":null,"abstract":"This paper proposes an efficient protocol for authentication and shared key establishment in hierarchical clustered wireless sensor networks. The protocol authenticates a source node to a base station, designates a cluster head to each authenticated source node and establishes shared keys between source node and the base station as well as with the cluster head. The above tasks are accomplished in a single step to reduce the required channel capacities. The protocol is implemented for TinyOS using NesC, simulated under TOSSIM and is viable for implementation in resource-constrained platforms like MICA. The security analysis shows that this protocol could withstand several possible attacks in the network","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116887187","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666660
A. Ramprasad, M. Meenakshi, G. Geetha, R. Satheesh kumar
Increase in the data rate of fiber optic communication system is limited due to the nonlinear effects like self phase modulation (SPM) cross phase modulation (CPM) four wave mixing (FWM), stimulated Raman scattering (SRS) and stimulated Brillion scattering (SBS). Many investigations are carried to mitigate these effects and in multi channel systems, four-wave mixing (FWM) in optical fibers induces channel crosstalk and possibly degrades system performance. An optical orthogonal code is a family of (0,1) sequences with good auto and cross correlation properties The use of optical orthogonal codes enables a large number of asynchronous users to transmit information efficiently and reliably. This paper examines the fiber optic code division multiple access technique and proposes an alternative frequency assignment scheme to suppress the FWM crosstalk by allocating frequencies to a set of unevenly spaced channels determined by an optical spreading code. This scheme is advantageous than the previously mentioned frequency assignment schemes like reduced optical bandwidth requirements, more number of channels with null FWM crosstalk points
{"title":"Suppression of four wave mixing crosstalk components in DWDM optical systems","authors":"A. Ramprasad, M. Meenakshi, G. Geetha, R. Satheesh kumar","doi":"10.1109/WOCN.2006.1666660","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666660","url":null,"abstract":"Increase in the data rate of fiber optic communication system is limited due to the nonlinear effects like self phase modulation (SPM) cross phase modulation (CPM) four wave mixing (FWM), stimulated Raman scattering (SRS) and stimulated Brillion scattering (SBS). Many investigations are carried to mitigate these effects and in multi channel systems, four-wave mixing (FWM) in optical fibers induces channel crosstalk and possibly degrades system performance. An optical orthogonal code is a family of (0,1) sequences with good auto and cross correlation properties The use of optical orthogonal codes enables a large number of asynchronous users to transmit information efficiently and reliably. This paper examines the fiber optic code division multiple access technique and proposes an alternative frequency assignment scheme to suppress the FWM crosstalk by allocating frequencies to a set of unevenly spaced channels determined by an optical spreading code. This scheme is advantageous than the previously mentioned frequency assignment schemes like reduced optical bandwidth requirements, more number of channels with null FWM crosstalk points","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124815372","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666615
K. Narayanaswamy, N. G. Kurahatti, T. Srinivas
The goal of this paper is to propose a method for carrier frequency offset estimation in a scenario where multiple users upload to a central coordinator simultaneously. OFDM based systems are highly prone carrier frequency offsets. The CFO estimation method proposed here is performed in time domain thereby facilitating a reduction in complexity at the central coordinator. The estimator makes use of the orthogonal training sequences that were transmitted by the different users. It is shown that the resulting CFO estimator is optimal not only in the sense that it minimizes the estimation error variance due to inter carrier interference
{"title":"Carrier frequency offset estimation in multiuser simultaneous channel access for MIMO-OFDM based WLANs","authors":"K. Narayanaswamy, N. G. Kurahatti, T. Srinivas","doi":"10.1109/WOCN.2006.1666615","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666615","url":null,"abstract":"The goal of this paper is to propose a method for carrier frequency offset estimation in a scenario where multiple users upload to a central coordinator simultaneously. OFDM based systems are highly prone carrier frequency offsets. The CFO estimation method proposed here is performed in time domain thereby facilitating a reduction in complexity at the central coordinator. The estimator makes use of the orthogonal training sequences that were transmitted by the different users. It is shown that the resulting CFO estimator is optimal not only in the sense that it minimizes the estimation error variance due to inter carrier interference","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"473 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116557762","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666633
G. Foudazi, H. Shafiee
Wireless communication networks are subject to a variety of interference signals, some of which emanate from bands adjacent to the signal of interest. Sidelobe emissions from adjacent band interferers leaks into the bandwidth of the signal of interest. Incomplete removal of frequency components due to the use of non-ideal filters could also cause distortion due to aliasing affects. In this paper, we study the effect of adjacent channel interference on OFDM wireless local area networks (WLAN's). We propose a transmit equalization approach which provides substantial improvement in interference-dominant channels. Simulation results are obtained for an OFDM communication system whose parameters are selected based on IEEE 802.11a standard for WLAN's
{"title":"Adjacent channel rejection in OFDM wireless local area networks","authors":"G. Foudazi, H. Shafiee","doi":"10.1109/WOCN.2006.1666633","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666633","url":null,"abstract":"Wireless communication networks are subject to a variety of interference signals, some of which emanate from bands adjacent to the signal of interest. Sidelobe emissions from adjacent band interferers leaks into the bandwidth of the signal of interest. Incomplete removal of frequency components due to the use of non-ideal filters could also cause distortion due to aliasing affects. In this paper, we study the effect of adjacent channel interference on OFDM wireless local area networks (WLAN's). We propose a transmit equalization approach which provides substantial improvement in interference-dominant channels. Simulation results are obtained for an OFDM communication system whose parameters are selected based on IEEE 802.11a standard for WLAN's","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121906749","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666558
A. Goel, A.K. Sharma
The popularity of portable computing devices coupled with the recent developments in group oriented computing, has not only made the design of mobile and wireless networks important but the design of flexible, efficient and portable multicast routing algorithm for highly mobile ad hoc networks a very difficult task. Ad hoc network is a collection of wireless, mobile, dynamic, and arbitrarily located nodes. The nodes cooperate with each other to create an infra structure less temporary low cost network. The high mobility of nodes result in rapid changes in the routes, thus requiring some mechanism for determining new routes with minimum overheads and bandwidth consumption. Such infrastructure less networks use multicast routing protocols to manage random and uncertain events like rescue missions, disaster recovery, crowd control etc. The existing multicast routing protocols suffer from many drawbacks (K. Obraczka and G, Tsufik, 1998) (Ching-Chuan Chiang et al., 1997). This paper presents a protocol called "a power managed based multicast routing protocol (PMMRP)" which has extended the lifetime of each mobile node by evenly utilization of power
随着便携式计算设备的普及和面向组计算技术的发展，移动和无线网络的设计变得越来越重要，而为高移动自组织网络设计灵活、高效、便携的组播路由算法也是一项非常困难的任务。自组织网络是无线、移动、动态和任意位置节点的集合。节点之间相互协作，创建一个基础设施少临时的低成本网络。节点的高移动性导致路由的快速变化，因此需要某种机制以最小的开销和带宽消耗来确定新的路由。这种基础设施较少的网络使用多播路由协议来管理随机和不确定的事件，如救援任务、灾难恢复、人群控制等。现有的组播路由协议存在许多缺陷(K. Obraczka and G, Tsufik, 1998) (Ching-Chuan Chiang et al.， 1997)。本文提出了一种基于功率管理的组播路由协议(PMMRP)，该协议通过均匀利用功率来延长每个移动节点的生存期
{"title":"A power managed based multicast routing protocol for mobile ad hoc network","authors":"A. Goel, A.K. Sharma","doi":"10.1109/WOCN.2006.1666558","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666558","url":null,"abstract":"The popularity of portable computing devices coupled with the recent developments in group oriented computing, has not only made the design of mobile and wireless networks important but the design of flexible, efficient and portable multicast routing algorithm for highly mobile ad hoc networks a very difficult task. Ad hoc network is a collection of wireless, mobile, dynamic, and arbitrarily located nodes. The nodes cooperate with each other to create an infra structure less temporary low cost network. The high mobility of nodes result in rapid changes in the routes, thus requiring some mechanism for determining new routes with minimum overheads and bandwidth consumption. Such infrastructure less networks use multicast routing protocols to manage random and uncertain events like rescue missions, disaster recovery, crowd control etc. The existing multicast routing protocols suffer from many drawbacks (K. Obraczka and G, Tsufik, 1998) (Ching-Chuan Chiang et al., 1997). This paper presents a protocol called \"a power managed based multicast routing protocol (PMMRP)\" which has extended the lifetime of each mobile node by evenly utilization of power","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123210164","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666648
D. Neel, M.S. Sakhalkar, S. Agarwal, D. Neel, S. Ray
In wavelength-routed optical WDM networks, which are circuit-switched in nature, when a session request is given, the hard task of routing and wavelength assignment (RWA) is to calculate the satisfiable path between two nodes, and also to assign an available set of wavelengths along this path. An algorithm called total wavelengths and expected available wavelengths (TEW) proposed by Pavarangkoon et. al. in order to achieve effective routing and wavelength assignment formulates a link weight function and considers this as the main factor for route selection. This function is calculated by using a determination factor of the number of wavelengths that are being used currently and are supposed to be available after a certain time. However, this algorithm tends to overload paths with smaller weights and higher utilization while lightly loaded paths with slightly lower capacities may remain unused. In this paper, we have proposed an improvement to the TEW algorithm by incorporating the frequency of usage of the paths in the weight function and running Dijkstra's shortest path algorithm to choose paths that have more total and expected available wavelengths and less frequency of usage. The proposed algorithm is called as countered total wavelengths and expected available wavelengths (CTEW) algorithm. The impact of the proposed algorithm on blocking probability is investigated by means of computer simulation and by comparing it with TEW algorithm. The results show that the proposed algorithm can achieve better performance in terms of blocking probability
波长路由光波分复用网络本质上是电路交换的，当给出会话请求时，路由和波长分配(RWA)的难点是计算两个节点之间的可满足路径，并沿着该路径分配一组可用的波长。Pavarangkoon等人为了实现有效的路由和波长分配，提出了总波长和预期可用波长(total wavelength and expected available wavelength, TEW)算法，该算法制定了链路权重函数，并将其作为路由选择的主要因素。该函数是通过使用当前正在使用的波长数的确定因子来计算的，并且应该在一定时间后可用。但是，该算法倾向于使权重较小、利用率较高的路径过载，而容量略低的轻负载路径可能不被使用。在本文中，我们提出了对TEW算法的改进，通过将路径的使用频率纳入权重函数，并运行Dijkstra最短路径算法来选择具有更多总和期望可用波长且使用频率较小的路径。该算法被称为总波长和预期可用波长(CTEW)算法。通过计算机仿真研究了该算法对阻塞概率的影响，并与TEW算法进行了比较。结果表明，该算法在阻塞概率方面具有较好的性能
{"title":"Routing algorithms with adaptive weight function based on total wavelengths and expected available wavelengths and frequency of usage in optical WDM networks","authors":"D. Neel, M.S. Sakhalkar, S. Agarwal, D. Neel, S. Ray","doi":"10.1109/WOCN.2006.1666648","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666648","url":null,"abstract":"In wavelength-routed optical WDM networks, which are circuit-switched in nature, when a session request is given, the hard task of routing and wavelength assignment (RWA) is to calculate the satisfiable path between two nodes, and also to assign an available set of wavelengths along this path. An algorithm called total wavelengths and expected available wavelengths (TEW) proposed by Pavarangkoon et. al. in order to achieve effective routing and wavelength assignment formulates a link weight function and considers this as the main factor for route selection. This function is calculated by using a determination factor of the number of wavelengths that are being used currently and are supposed to be available after a certain time. However, this algorithm tends to overload paths with smaller weights and higher utilization while lightly loaded paths with slightly lower capacities may remain unused. In this paper, we have proposed an improvement to the TEW algorithm by incorporating the frequency of usage of the paths in the weight function and running Dijkstra's shortest path algorithm to choose paths that have more total and expected available wavelengths and less frequency of usage. The proposed algorithm is called as countered total wavelengths and expected available wavelengths (CTEW) algorithm. The impact of the proposed algorithm on blocking probability is investigated by means of computer simulation and by comparing it with TEW algorithm. The results show that the proposed algorithm can achieve better performance in terms of blocking probability","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116287117","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666624
Yuya Numata, Hiroaki Higaki
This paper shows that the maximal end-to-end bandwidth in a wireless multihop transmission is 1/2 of bandwidth of communication links and is 1/3 if there are no transmission power control. Then, we propose a method for extension of end-to-end bandwidth by successive reduction of wireless signal transmission power along a multihop message transmission route. Our proposed protocol designed based on AODV achieves 60% wider bandwidth with small reduction of connectivity in simulation
{"title":"Power controlled routing in wireless multihop communication for higher end-to-end bandwidth","authors":"Yuya Numata, Hiroaki Higaki","doi":"10.1109/WOCN.2006.1666624","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666624","url":null,"abstract":"This paper shows that the maximal end-to-end bandwidth in a wireless multihop transmission is 1/2 of bandwidth of communication links and is 1/3 if there are no transmission power control. Then, we propose a method for extension of end-to-end bandwidth by successive reduction of wireless signal transmission power along a multihop message transmission route. Our proposed protocol designed based on AODV achieves 60% wider bandwidth with small reduction of connectivity in simulation","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116301181","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666665
G. Gnanagurunathan, F. A. Rahman
We have evaluated the chromatic dispersion compensation for a long-haul WDM transmission. A 4 channel optical network was modeled, simulated and analyzed at a 600 km distance using two chromatic dispersion compensators i.e. fiber Bragg grating (FBG) and dispersion compensated fiber (DCF). Subsequently the modulation scheme and also the traffic load are varied to determine the robustness of the compensators to sustain the changes imposed on the lightwave optical system. This analysis concludes that the grating device seems to be the better compensating solution for the long haul narrowband transmission. In addition, the FBG is also able to sustain the changes in traffic load and modulation scheme much better than the DCF
{"title":"Comparing FBG and DCF as dispersion in the long haul narrowband WDM systems","authors":"G. Gnanagurunathan, F. A. Rahman","doi":"10.1109/WOCN.2006.1666665","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666665","url":null,"abstract":"We have evaluated the chromatic dispersion compensation for a long-haul WDM transmission. A 4 channel optical network was modeled, simulated and analyzed at a 600 km distance using two chromatic dispersion compensators i.e. fiber Bragg grating (FBG) and dispersion compensated fiber (DCF). Subsequently the modulation scheme and also the traffic load are varied to determine the robustness of the compensators to sustain the changes imposed on the lightwave optical system. This analysis concludes that the grating device seems to be the better compensating solution for the long haul narrowband transmission. In addition, the FBG is also able to sustain the changes in traffic load and modulation scheme much better than the DCF","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114735761","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}
Pub Date : 2006-08-07DOI: 10.1109/WOCN.2006.1666650
Chia-Sheng Tsai
Thanks to fiber-to-the-home (FTTH) networks offering remarkably lower cost per Mbps for multimedia communications, it has been the potential solution for the future broadband access networks. With increase of bandwidth requirement nowadays, subscribers using xDSL are changing to adopt FTTH service at a high rate for bandwidth-rich applications, such as on-line games, video-on-demand, long-distance education, or other real-time streaming reception. There are several main FTTH infrastructures, all of which are based on passive optical networks (PON) or with active nodes. And it is attractive to adopt PON architectures because there is no power consumption between optical line terminal (OLT) and the optical network units (ONU). However, in the upstream direction (from ONUs to the OLT), all ONUs using the same photonic wavelength (share the same frequency channel) need a mechanism to coordinate their transmission. In order to speed up traffic flow and upgrade the quality of service in the connections, we propose a multi-homing scheme to bundle an association to end users. In the numerical results, it reveals that with the multi-streaming approach, not only the head-of-line blocking problem was resolved, but also better total network efficiency can be achieved
{"title":"Bandwidth allocation schemes for FTTH networks","authors":"Chia-Sheng Tsai","doi":"10.1109/WOCN.2006.1666650","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666650","url":null,"abstract":"Thanks to fiber-to-the-home (FTTH) networks offering remarkably lower cost per Mbps for multimedia communications, it has been the potential solution for the future broadband access networks. With increase of bandwidth requirement nowadays, subscribers using xDSL are changing to adopt FTTH service at a high rate for bandwidth-rich applications, such as on-line games, video-on-demand, long-distance education, or other real-time streaming reception. There are several main FTTH infrastructures, all of which are based on passive optical networks (PON) or with active nodes. And it is attractive to adopt PON architectures because there is no power consumption between optical line terminal (OLT) and the optical network units (ONU). However, in the upstream direction (from ONUs to the OLT), all ONUs using the same photonic wavelength (share the same frequency channel) need a mechanism to coordinate their transmission. In order to speed up traffic flow and upgrade the quality of service in the connections, we propose a multi-homing scheme to bundle an association to end users. In the numerical results, it reveals that with the multi-streaming approach, not only the head-of-line blocking problem was resolved, but also better total network efficiency can be achieved","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130180962","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}
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