2012 IV International Congress on Ultra Modern Telecommunications and Control Systems最新文献_第4页

On the benefits of backup resource sharing in transparent and opaque networks 在透明和不透明网络中备份资源共享的好处

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459755

D. Staessens, D. Colle, M. Pickavet, P. Demeester

{"title":"On the benefits of backup resource sharing in transparent and opaque networks","authors":"D. Staessens, D. Colle, M. Pickavet, P. Demeester","doi":"10.1109/ICUMT.2012.6459755","DOIUrl":"https://doi.org/10.1109/ICUMT.2012.6459755","url":null,"abstract":"Transparent networks promise a cost efficient solution for future core and metro networks, due to the high cost-efficiency for switching trunk traffic. Network availability is an important performance parameter for network operators, who are incorporating protection and restoration mechanisms in the network to achieve competitive advantages. This paper will focus on the reduction in Capital Expenditures (CapEx) expected from implementing protection in transparent networks. We dimension a nationwide transparent network topology for restoration and path protection mechanisms using transparent and opaque architectures. We investigate the gain through protection sharing in relation to the number of links in a meshed network and the offered load on a population of 1000 generated 2-connected planar topologies with 14 nodes. We show that the gain in a transparent network is heavily dependent on the offered load, with almost no relative gain for low load (no required parallel line systems). We also show that, for opaque networks, this relative gain by protection sharing is independent of the traffic load and shows a small dependency on the number of links in the network. The node CapEx reduction for high load is comparable to the CapEx reduction in opaque OTN systems. This is rather surprising as in OTN systems the number of transceivers and linecards and the size of the OTN switching matrix all decrease, while in transparent networks only the degree of the ROADM (number and size of WSSs in the node) decreases while the number of transponders remains the same.","PeriodicalId":337446,"journal":{"name":"2012 IV International Congress on Ultra Modern Telecommunications and Control Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131350816","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

User-centric Content Distribution Network architecture 以用户为中心的内容分发网络架构

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459690

H. Tran, A. Mellouk, S. Hoceini, Julien Perez

引用次数: 2

Advanced multilayer resilience scheme with optical restoration for IP-over-DWDM core networks IP-over-DWDM核心网带光恢复的先进多层弹性方案

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459749

M. Gunkel, A. Autenrieth, M. Neugirg, J. Elbers

{"title":"Advanced multilayer resilience scheme with optical restoration for IP-over-DWDM core networks","authors":"M. Gunkel, A. Autenrieth, M. Neugirg, J. Elbers","doi":"10.1109/ICUMT.2012.6459749","DOIUrl":"https://doi.org/10.1109/ICUMT.2012.6459749","url":null,"abstract":"Future IP-over-DWDM networks improve economics not only from eliminating grey interfaces substituted by coloured interfaces directly plugged into the packet routers. An even major leverage reducing cost of a traditionally over-dimensioned packet network can be attributed to architectural aspects including advanced multilayer resilience. This is enabled by newly available, flexible optical technology allowing a more dynamic mode of operation of IP-over-DWDM networks. The flexible optical layer can be used to offer service-differentiated resilience combining IP protection with optical restoration in IP-over-Optical networks. By this approach, higher interface utilization can be achieved reducing capital expenditures. In addition, this also improves the overall network availability and reduces operational expenditures. After a short overview on the key enabling technologies for flexible IP-over-DWDM interworking, the authors provide guidelines for the cost-efficient IP topology design of multilayer IP-over-DWDM core networks and show that for a German backbone reference network the combination of IP A/B-plane protection with optical restoration requires 24 - 27% fewer line interfaces compared to the multilayer optimized bypass network design.","PeriodicalId":337446,"journal":{"name":"2012 IV International Congress on Ultra Modern Telecommunications and Control Systems","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126298129","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: 19

Challenges of the always-best-connected enablers for user equipment in Evolved Packet System 演进分组系统中用户设备始终最佳连接使能器的挑战

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459660

Jari Kellokoski

{"title":"Challenges of the always-best-connected enablers for user equipment in Evolved Packet System","authors":"Jari Kellokoski","doi":"10.1109/ICUMT.2012.6459660","DOIUrl":"https://doi.org/10.1109/ICUMT.2012.6459660","url":null,"abstract":"Mobile Internet has rapidly evolved in the past years with an ever increasing number of novel technologies and services with a variety of access technologies. Indeed, today's mobile devices often support multiple communication technologies for accessing Internet services. However, they all do not tap the full potential of these capabilities, as users often have to manually select each network, and only one network is used at a time. The concept of Always Best Connected (ABC) allows a person to connect applications using the devices and access technologies that best suit to his or her needs, thereby combining the features of access technologies to provide an enhanced user experience for future Internet. One of the key features for ABC in a heterogeneous network environment is the ability to make vertical handovers. These handovers are ones where the existing connection is changed from one technology to another. This handover has been considered to be complex and to generate a number of requirements.Over the resent years there have been techniques and standards to overcome the difficulties with vertical handovers. In this research the user equipment requirements of the most significant standards are examined and specification popularity in academic world and commercially is discussed. In addition, the performance of vertical handover with Android-based implementation is examined in real-life heterogeneous network environment. The presented standards are: Voice Call Continuity based on IP Multimedia Subsystem, Unlicensed Mobile Access, Media Independent Handover and The Third Generation Partnership Project Evolved Packet System. The research will show that existing mobile platforms such as Android environment is lacking some of the key requirements for vertical handover and current implementations cannot achieve seamless mobility by means that are currently defined by specifications.","PeriodicalId":337446,"journal":{"name":"2012 IV International Congress on Ultra Modern Telecommunications and Control Systems","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121690665","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

Hybrid optical amplifiers for flexible development in long reach optical access system 混合光放大器在远距离光接入系统中的灵活发展

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459732

V. Bobrovs, S. Olonkins, O. Ozolins, J. Porins, G. Lauks

{"title":"Hybrid optical amplifiers for flexible development in long reach optical access system","authors":"V. Bobrovs, S. Olonkins, O. Ozolins, J. Porins, G. Lauks","doi":"10.1109/ICUMT.2012.6459732","DOIUrl":"https://doi.org/10.1109/ICUMT.2012.6459732","url":null,"abstract":"In this paper the authors have investigated the performance improvement in long reach optical access system with hybrid optical amplifiers. The apparent options of optical amplification in wavelength division multiplexing systems include the distributed Raman amplifiers, erbium doped fiber amplifiers, and semiconductor optical amplifiers. In our case distributed Raman amplifier is located at the mid-span reach extender which allows for remote amplification in passive network nodes by distributing a Raman pump together with the data signals. In the case of only distributed Raman amplifier in long reach optical access system wavelength division multiplexing exploitation is inefficient. Combining the advantages of different amplifiers allows fast gain dynamics, simultaneous large bandwidth amplification, and the ability to provide gain at any wavelength. Degradation of optical signal quality is evaluated in 10 Gbit/s long reach wavelength division multiplexing optical access system with hybrid distributed Raman-erbium doped fiber amplifier and distributed Raman-semiconductor optical amplifier.","PeriodicalId":337446,"journal":{"name":"2012 IV International Congress on Ultra Modern Telecommunications and Control Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125614787","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: 18

Broadband access to the internet via mobile interfaces 通过移动接口宽带接入互联网

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459777

Pawel Bardowski, J. Klink, Maria Jolanta Podolska, T. Uhl

引用次数: 0

Distributed Resource Map: A database-driven network support architecture for Cognitive Radio ad hoc networks 分布式资源映射:一个数据库驱动的网络支持架构，用于认知无线电自组织网络

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459662

S. Khan, M. Kalil, A. Mitschele-Thiel

引用次数: 9

Low-complexity frequency synchronization for GSM systems: Algorithms and implementation GSM系统的低复杂度频率同步:算法和实现

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459659

Harald Kröll, S. Zwicky, C. Benkeser, Qiuting Huang, A. Burg

引用次数: 8

Determination of liquid crystal filled photonic crystal fiber parameters and nonlinear effects in supercontinuum generation 液晶填充光子晶体光纤参数的测定及超连续谱产生中的非线性效应

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459735

J. Johny, S. Shashidharan

引用次数: 2

Real time algorithm temperature compensation in tunable laser / VCSEL based WDM-PON system 基于可调谐激光/ VCSEL的WDM-PON系统的实时温度补偿算法

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems Pub Date : 2012-10-01 DOI: 10.1109/ICUMT.2012.6459672

M. Iglesias, R. Rodes, T. Pham, I. Monroy

引用次数: 6