2006 IFIP International Conference on Wireless and Optical Communications Networks最新文献

Queuing network model for link and path availability of ad hoc networks 自组织网络中链路和路径可用性的排队网络模型

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666563

V. Jain, M. Jain

{"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}

引用次数: 8

An efficient protocol for authentication and initial shared key establishment in clustered wireless sensor networks 一种高效的集群无线传感器网络认证和初始共享密钥建立协议

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666568

J. Abraham, K. Ramanatha

引用次数: 27

Suppression of four wave mixing crosstalk components in DWDM optical systems DWDM光学系统中四波混频串扰分量的抑制

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666660

A. Ramprasad, M. Meenakshi, G. Geetha, R. Satheesh kumar

{"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}

引用次数: 8

Carrier frequency offset estimation in multiuser simultaneous channel access for MIMO-OFDM based WLANs 基于MIMO-OFDM的无线局域网多用户同步信道接入中的载波频偏估计

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666615

K. Narayanaswamy, N. G. Kurahatti, T. Srinivas

引用次数: 0

Adjacent channel rejection in OFDM wireless local area networks OFDM无线局域网中的相邻信道抑制

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666633

G. Foudazi, H. Shafiee

引用次数: 3

A power managed based multicast routing protocol for mobile ad hoc network 一种基于电源管理的移动自组网多播路由协议

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666558

A. Goel, A.K. Sharma

{"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}

引用次数: 4

Routing algorithms with adaptive weight function based on total wavelengths and expected available wavelengths and frequency of usage in optical WDM networks 光波分复用网络中基于总波长和预期可用波长及使用频率的自适应权函数路由算法

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666648

D. Neel, M.S. Sakhalkar, S. Agarwal, D. Neel, S. Ray

{"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}

引用次数: 1

Power controlled routing in wireless multihop communication for higher end-to-end bandwidth 高端到端带宽无线多跳通信中的功率控制路由

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666624

Yuya Numata, Hiroaki Higaki

引用次数: 2

Comparing FBG and DCF as dispersion in the long haul narrowband WDM systems 比较光纤光栅和DCF在长途窄带WDM系统中的色散

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666665

G. Gnanagurunathan, F. A. Rahman

引用次数: 23

Bandwidth allocation schemes for FTTH networks FTTH网络的带宽分配方案

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666650

Chia-Sheng Tsai

{"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}

引用次数: 1