Due to the fast increase of Internet traffic and the enormous bandwidth potential of alloptical transport networks based on Wavelength Division Multiplexing, an IP-over-WDM network scenario is likely to be widespread in future communication networks. At the same time, IP networks are becoming more and more mission-critical. Hence, it is of paramount importance for IP-over-WDM networks to be abl...

Hybrid networks are networks capable of switching data at multiple levels (optical and IP packet level) by means of multi-service optical switches. As a result of that, huge flows at the IP-level may be moved to the optical-level, which is faster than the packet-level. Such move could be beneficial since congested IP networks could be off-loaded, leaving more resources for other IP flows. At th...

Multi-Protocol Label Switching (MPLS) is an alternative to integrate Internet Protocol (IP) routing and switching technologies because it provides end-to-end Quality of Service (QoS), guarantees traffic engineering, and support Virtual Private Networks (VPNs). However, MPLS must use path restoration schemes to guarantee the delivery of packets through a network. Considering that MPLS is a label...

The IP networking industry is defining ways to differentiate service levels and provide contracted quality of service. Much of the work, such as multi-protocol label switching, is moving toward traffic engineering models for aggregate streams that closely parallel those of ATM networks. A general architecture, similar to that used for ATM connections, is suggested for the traffic management of ...

Cellular telephones save power by switching to a low power, or dormant, mode when there is no active traffic. In dormant mode, the telephone periodically checks for a beacon, and if the beacon indicates that the phone has moved to a new paging area, the telephone performs a paging area update. Paging area update signaling requires considerably less power than is required to move an active traff...

To support bursty traac on the Internet (and especially WWW) eeciently, optical burst switching (OBS) is proposed as a way to streamline both protocol and hardware in building the future generation Optical Internet. By leveraging the attractive properties of optical communications and at the same time, taking into account its limitations, OBS combines the best of optical circuit-switching and p...

Given the significant progress made and the continuing advances expected in the optical networking technology, it becomes attractive to build a future Optical Internet that natively supports bursty IP datagrams. Burst switching WDM optical networks are touted as suitable network architectures for future Optical Internet backbones. However, the lack of optical processing capabilities results in ...

Wireless communications is the fastest growing segment of the communications industry. Everyone wants the quality of services anytime & anywhere. Wireless networks can integrate various heterogeneous radio access technologies as GSM, WLAN, Wimax etc. WiMAX is an IP based, wireless broadband access technology that provides performance similar to 802.11/Wi-Fi networks with the coverage and QOS (q...

In today’s class, we cover the topic of the Internet with emphasis on review of TCP/IP. ( A good reference is [1] and a slightly more readable but less comprehensive is [2] I. NETWORKS Communication networks are usually defined by their size and complexity. From top-down, we have • Wide area networks(WAN) These networks connect computers and other terminals over large distances. They often requ...

Optical networking technology has experienced remarkable advances in a short time, making it possible to build future Optical Networks that support bursty IP datagrams. This has resulted in numerous e orts to develop optical-burst switching WDM networks for the future Optical Network backbones. However, the optical domain lacks intelligence and cannot process the bursts, leading to increased bl...