real time provisioning of optical communication networks

... overcome Emerging optical communication networks represent a step in that direction The Handbook of Optical Communication Networks is a source of comprehensive reference material for such networks The ... density of traffic together with span/reach plays a role in categorizing various domains of optical networks Another perspective of optical networks pertains to various optical transport networks ... two: Evolution of optical networks architecture 35 generation of optical transport systems.10,14 The switching and routing functions of such third generation optical networks, of course, will...

Ngày tải lên: 24/08/2014, 17:52

... Jain Analysis of the Increase and Decrease Algorithms for Congestion Avoidance in Computer Network Computer Networks and ISDN Systems, 17:1-14, 1989 [19] Intelligen Streaming www.microsoft.com/windows/ ... Reliability http://www .real. com/devzone/library/ whitepapers/surestrm.html,1998 [21] R Rejaie, M Handley, and D Estrin RAP: An Endto-End Rate-base Congestion Control Mechanism for Realtime Streams in ... IP-based networks using feedback from routers Technical Report TKN-04-008, July 2004 [8] D Katabi, M Handley, and C Rohrs Congestion control for high bandwidth-delay product networks Proceedings of...

Ngày tải lên: 24/12/2013, 07:16

... by keeping historical track of the alerts generated over time For example, user of port of access switch 25 is of critical risk because s/he has more than x number of invalid unsolicited ARP requests ... Profiles and the Subscriber Network Profiles The Subscriber Network Profiles provide the list of legitimate users and their associated network identifiers, namely, the MAC and IP addresses of ... novel term network “alert state”, a function of the number of security events captured over the last T units of time The security events are the set of events that have implications to network...

Ngày tải lên: 05/03/2014, 23:20

... computation time, but it still has a drawback The authors defined the cost function as the sum of the cost of the primary path and the cost of the backup path, i.e., the cost of a unit of the network ... function is defined as the inverse of the cost of the cycle Let CP be the cost of the primary lightpath CP is defined as the number of hops (i.e the length of the route), assuming there is at ... h N where N is the number of network nodes and h is the number of hops of the primary lightpath Since in Bisbal’s definition the cost of a free channel on a link of a primary lightpath or a...

Ngày tải lên: 28/03/2014, 13:20

... and many a time manually Most of the remedial actions included routing of the call by manual configuration of switches by network operators Over time the capacity of the transport networks increased, ... levels of QoS on packet networks – particularly for voice and other real- time services Further advances in the area of telecommunications over the last half a century have enabled the communication ... at the time of the request 2.7 Traffic grooming in WDM networks 29 Recent advances in optical switching technology, as in [41, 44, 131], have shown the possibility of realizing fast all-optical...

Ngày tải lên: 01/06/2014, 11:37

... performance of RAP-MAC via simulations We review the related literature in Section and conclude in Section Page of 15 ON/OFF source with activity factor defined as the fraction of time the user ... arbitrary time instant (i.e., we not assume a time- slotted system) The unlicensed users of the CRN can opportunistically access any of the N non-overlapping channels, one channel at a given time A ... require the exact apriori knowledge of the statistics of the activities of primary users and the number of competing SUs in order to compute the probability of sensing a particular spectrum band...

Ngày tải lên: 20/06/2014, 21:20

... performance of RAP-MAC via simulations We review the related literature in Section and conclude in Section Page of 15 ON/OFF source with activity factor defined as the fraction of time the user ... arbitrary time instant (i.e., we not assume a time- slotted system) The unlicensed users of the CRN can opportunistically access any of the N non-overlapping channels, one channel at a given time A ... require the exact apriori knowledge of the statistics of the activities of primary users and the number of competing SUs in order to compute the probability of sensing a particular spectrum band...

Ngày tải lên: 20/06/2014, 22:20

... memory complexity of our solution is acceptable for nowadays sensors The analysis of the communication complexity for the construction of the tree is measured by the number of messages received ... solution, some of the possible link keys in a network of size N are represented as a (λ+1) × N key matrix The scheme stores small amount of information in each sensor node, so that some pair of nodes ... polynomial of degree λ) to each sensor So, each sensor node stores a polynomial with λ + coefficients and every pair of sensor nodes can establish a key using the property of symmetry of polynomials...

Ngày tải lên: 21/06/2014, 11:20

... system has a total of C resource units, being the physical meaning of a unit of resource dependent on the specific technological implementation of the radio interface For the sake of mathematical ... A Attar, S A Ghorashi, M Sooriyabandara, and A H Aghvami, “Challenges of real- time secondary usage of spectrum,” Computer Networks, vol 52, no 4, pp 816–830, 2008 [6] I F Akyildiz, W.-Y Lee, M ... continuous -time Markov chain (CTMC) models that define the operation of systems (S1) and (S2) The aim is to use these models to evaluate ft the effectiveness of AC to limit P2 Numerical results of this...

Ngày tải lên: 21/06/2014, 17:20

... lifetime and coverage of sensor networks [20–23] PROFILE-MATCHING-BASED RECONFIGURATION In this section, we depict the envisioned scenario including our lab setup and the basic concepts of profile-based ... prerequisites of single software modules (see Figure 5) MP1 is a hardware-independent module to calculate some statistics of measured data Finally, MP2 and MP3 represent alternatives of a software ... reconfiguration of surrounding sensor nodes The presented profile matching techniques build the basis for the development of dynamic reconfiguration in largescale sensor networks The adaptive exchange of software...

Ngày tải lên: 22/06/2014, 22:20

... lifetime and coverage of sensor networks [20–23] PROFILE-MATCHING-BASED RECONFIGURATION In this section, we depict the envisioned scenario including our lab setup and the basic concepts of profile-based ... prerequisites of single software modules (see Figure 5) MP1 is a hardware-independent module to calculate some statistics of measured data Finally, MP2 and MP3 represent alternatives of a software ... reconfiguration of surrounding sensor nodes The presented profile matching techniques build the basis for the development of dynamic reconfiguration in largescale sensor networks The adaptive exchange of software...

Ngày tải lên: 22/06/2014, 22:20

... Rapid STP Resource Reservation Protocol Real Time Round Trip propagation Delay Retransmission TimeOut Real- time Transport Protocol Round Trip Time real- time- VBR Satellite Access Control Slotted-ALOHA ... Department of the University of Siena, Italy, first as research associate and then as assistant professor He teaches the advanced course of Telecommunication Networks at the University of Siena ... of timeslots Each frame is divided in timeslots characterized by a timeslot number (TS nb); also timeslots can be organized in slot groups with similar characteristics Fig 1.5: Organization of...

Ngày tải lên: 27/06/2014, 01:21

... sectors: ITU-T that aims at the definition of high-quality standards covering all fields of telecommunications; ITU-R that plays a fundamental role in the management of the radio-frequency spectrum, physical ... management of the radio-frequency spectrum, a finite natural resource that is increasingly in demand due to the rapid development of new radio-based services and the enormous popularity of mobile communication ... full list of services and frequency bands allocated in different regions forms the Table of Frequency Allocations, which is a part of the radio regulations 10.7 Conclusions A range of cross-layer...

Ngày tải lên: 05/07/2014, 19:20

... communications, television broadcasting, computer communications as well as navigation The use of satellites for communications was a brilliant idea of Arthur C Clarke who wrote a famous article ... (homogeneous) communication system and technology Other very significant advantages of the satellite approach are: (i ) easy fruition of both broadcast and multicast high bit-rate multimedia services; ... markets are: the extension of the DVB-S2/-RCS standard for mobile usage, satellite IP networks interconnected with terrestrial wireless systems, and the convergence of satellite communications and remote...

Ngày tải lên: 05/07/2014, 19:20

... SATELLITE COMMUNICATIONS AND RESOURCE MANAGEMENT 1.1 Satellite communications 1.2 Basic issues in the design of satellite communication ... xiii List of Contributors xix List of Acronyms and Abbreviations xxiii Part I Resource Management Framework for Satellite Communications ... inteRwOrking 2.6.3 SatNEx: Satellite Network of Excellence 2.6.4 NEWCOM: Network of Excellence in Wireless COMmunications 2.6.5 VIRTUOUS:...

Ngày tải lên: 05/07/2014, 19:20

... Rapid STP Resource Reservation Protocol Real Time Round Trip propagation Delay Retransmission TimeOut Real- time Transport Protocol Round Trip Time real- time- VBR Satellite Access Control Slotted-ALOHA ... with satellite communications, cost is independent of the distance Moreover, satellite networks can easily cover a great part of the Earth, thus reaching a very big potential market of customers ... Information Society Technologies International Telecommunication Union ITU - Telecommunication Development sector ITU - Radiocommunication sector ITU - Telecommunication sector Idealized Wireless Fair...

Ngày tải lên: 05/07/2014, 19:20

... generation of Moving Picture Experts Group - Transport Stream (MPEG2-TS) packets of 188 bytes (fixed length) A TCP header of 20 bytes, an IP header of 20 bytes and an MPE header + CRC trailer of 12 ... Giambene 1.2 Basic issues in the design of satellite communication systems Satellite communications represent an attractive solution to provide broadband and multimedia services To make the upcoming ... effect of radiations, the necessity of new components, etc GEO satellites have a lifetime in the range of 10-15 years MEO satellites have an operational period of 10-12 years Finally, LEO satellites...

Ngày tải lên: 05/07/2014, 19:20

... of timeslots Each frame is divided in timeslots characterized by a timeslot number (TS nb); also timeslots can be organized in slot groups with similar characteristics Fig 1.5: Organization of ... point-to-point, or point-to-multipoint communications of multiple or single MPEG-TS, by means of CCM or ACM modes Professional Services/applications mainly consists of professional pointto-point and point-to-multipoint ... range of carrier frequencies (with potentially different bandwidth size), each of them organized in super-frames, frames and time- slots The NCC assigns to each active RCST a set of bursts, each of...

Ngày tải lên: 05/07/2014, 19:20

... 1790 km) Traffic assumptions (study made in Chapter 8, Section 8.6): non -real- time traffic for email or FTP and real- time multimedia traffic, e.g., interactive voice and video applications For each ... SATELLITE COMMUNICATIONS 29 Fig 1.9: Examples for the use of satellite links in telecommunication networks interworking, to define a new network architecture and to include alternative families of lower ... Chapter 1: INTRODUCTION TO SATELLITE COMMUNICATIONS 35 of the internal state of the other layers of the protocol stack For instance, OSI layer (e.g., IP) and above often need direct interfaces to...

Ngày tải lên: 05/07/2014, 19:20

... source-to-destination delivery of connection requests (in circuit-switched networks) or packets (in packet-switched networks) ; it must know about the topology of the communication subnet and choose ... CNR-ISTI - Research Area of Pisa, Italy CNIT - University of Genoa, Italy FhI - Fraunhofer Institute - FOKUS, Berlin, Germany 2.1 Introduction The efficient exploitation of common resources is an ... goal of RRM is to optimize request satisfaction and, at the same time, to try to maintain a 44 Erina Ferro certain degree of fairness among all users End-user QoS in satellite/terrestrial networks...

Ngày tải lên: 05/07/2014, 19:20