10G-PON

About: 10G-PON is a research topic. Over the lifetime, 1675 publications have been published within this topic receiving 27843 citations. The topic is also known as: XG-PON.

Optimized design of wdm network architectures

Abstract: In recent years, there has been an explosive growth of the Internet in terms of (a) user population, (b) geographical coverage, and (c) carried traffic. To accommodate the increasing number of end-users who require large bandwidth, the Internet infrastructure needs to be scalable, i.e., able to accommodate traffic growth without significant changes to its existing operation. Optical networks based on wavelength-division multiplexing (WDM) technology offer the promise to satisfy the bandwidth requirements of the Internet infrastructure, and provide a scalable solution to support the bandwidth needs of future applications in the local and wide areas. This dissertation examines the optimized design and performance analysis of survivable WDM optical networks, and proposes new WDM-based network architectures. In a WDM optical network, the routing scheme employed to route optical channels has a significant impact on the network performance. An approximate analytical model for fixed-alternate routing that incorporates sparse wavelength conversion is developed for estimating different network performance parameters. The failure of network elements (e.g., fiber links, cross-connects, etc.) in a WDM optical network may cause the failure of several optical channels, thereby leading to large data losses. Several approaches based on protection/restoration are examined to protect mesh-based optical networks from single-link failures. Distributed control algorithms are proposed for restoring optical channels after a link failure. A new network architecture called Wavelength Distributed Data Interface (WDDI) is proposed. This architecture enhances a fiber-optic ring network, such as FDDI, to operate over multiple wavelengths on its existing fiber plant consisting of point-to-point fiber links. In this architecture, network nodes can be partitioned to operate over multiple subnetworks, with each subnetwork operating independently on a different wavelength, and inter-subnetwork traffic forwarding performed by a bridge. The architecture of WDDI nodes and bridges are investigated, and algorithms are proposed for optimally partitioning nodes into subnetworks. The design of a WDM-based wide-area optical network that can support packet-switched traffic is investigated. Such a wide-area optical network can significantly enhance the capabilities and capacity of a packet-switched backbone network. The optimized network-design problem is formulated, and heuristic algorithms are developed for its solution.

Chasing errors through the network stack: a testbed for investigating errors in real traffic on optical networks

Abstract: A testbed is described that allows both physical layer errors to be observed and analyzed, as well as monitoring network performance via frame loss. Real network traffic loads can be used for testing so that all measurements taken are representative of what would be seen in a deployed system. We illustrate our testbed with an examination of the behavior of a well-known networking standard, Gigabit Ethernet, in conditions of reduced receiver power on optical fiber. Our testbed results show that the line codes used to represent the data in the network affect the bit error rate for that data. Along with the previously reported result that bit error rate and packet error rate have only a weakly deterministic relationship, this highlights the need for testing of all network layers within a complete system carrying real-world traffic.

On the Development of Modular Optical Wireless Elements (MOWE)

Abstract: We report on the development of optical wireless arrays composed of multiple electrically interconnected optical modules (i.e., elements) forming a flat or curved terminal that is inexpensive, lightweight, and easy-to-assemble. The technology enables economic access to wide field-of-view optical communication for last-mile broadband connectivity. The smart modules provide reconfigurability, as well as local and central processing capabilities, to enable innovative short- and medium-range applications for free- space optics (FSO) beyond traditional fixed, high data rate, point-to-point links. We demonstrate several proof-of-concept optical arrays, including flat, dome, and spherical shapes. An omnidirectional spherical optical terminal weighs approximately 150g and costs less than $200. This technology can facilitate multiple simultaneous communication links at data rates up to 1Mbps. The MOWE concept is flexible and scalable to various applications like user tracking, mobile FSO, multi-hop mesh networks, noise measurements, indoor communications, and MIMO FSO, among others.

Fiber-supported 60 GHz mobile backhaul links for access/metropolitan deployment

Abstract: We present a 60 GHz wireless link fully supported with the optical fiber infrastructure. The architecture that we implement is suitable to provide the efficient wireless/fiber mobile backhaul in access/metropolitan area. Bit error rate (BER) performance below the 7% overhead forward error correction (FEC) limit is presented for transmission of 1.25 Gbps data signals. Ultimately, transmission through fiber-wireless-fiber link is achieved including 4 m of wireless distance and 20 km of standard single mode fiber (SSMF) interfacing the antennas on each side.