Future Service Adaptive Access/Aggregation Network Architecture

Abstract

SUMMARYThe emergence of new services in the cloud computing era has made smooth service migration an important issue in access networks. However, different types of equipment are typically used for the different services due to differences in service requirements. This leads to an increase in not only capital expenditures but also operational expenditures. Here we propose using a service adaptive approach as a solution to this problem. We analyze the requirements of a future access network in terms of service, network, and node. We discuss available access network technologies including the passive optical network, single star network. Finally, we present a future service adaptive access/aggregation network and its architecture along with a programmable optical line terminal and optical network unit, discuss its benefit, and describe example services that it would support. key words: optical access network, passive optical network, network service, network topology

Application-Centric, Energy-Efficient Network Architecture ACTION, Based on Virtual Optical Slice Core and Deterministic Optical Access Network

“…The ACTION edge nodes of the core network monitor each application's QoE. This access network is comprised of the Logical-Optical Line Terminals (L-OLTs) [17], which provide functions suited for each network service, and the ODN, which adopts the MZ type PLZT optical switches [14][15][16]. Figure 2 shows the virtual optical slice core network, where multi-route paths can be aggregated into several virtual optical paths, including high, middle, and low QoS optical slices.…”

“…This network is comprised of the L-OLTs [17], the LogicalOptical Network Units (L-ONUs), and the configurable ODN. Both L-OLT and L-ONU are structured by using reconfigurable logical devices and provide media access control (MAC) functions and physical (PHY) functions suited for each network service.…”

Wide Dynamic Range Reception of TDM-Based DCO-OFDM Signals Using Optical Domain Power Equalization and Symmetrical Clipping Techniques

“…user through an optical splitter outside a central office. A more advanced concept that accommodates several access sections with a point-to-multipoint topology through a metro section with a ring or mesh topology where each remote node hosts some active devices (e.g., wavelength selective switch) has also been proposed [1]- [3]. Regardless of network configuration, different wavelength pairs (for downstream and upstream) are assigned to multiple services and they are transmitted over the same optical distribution network using wavelength division multiplexing (WDM) technologies [2], [3].…”

“…However, it is expected that future optical access systems will require additional advantages other than just increased bandwidth: multiple service accommodation [1]- [4] (e.g., residential, business, Machine-to-Machine (M2M), and mobile) and elastic bandwidth allocation depending on the services which offers scalable solutions to the coverage area [2], and efficient utilization of wavelength resources [3].…”

A study on network control method in Elastic Lambda Aggregation Network (EλAN)

“…In the access and aggregation network area, Service Adaptive Access/Aggregation Network (SAAN) has been proposed [4] [5]. SAAN aggregates multiple network services having different protocols and QoS requirements in a single network system.…”