Design and implementation of the link capacity adjustment scheme FPGA

摘要

Link Capacity Adjustment Scheme (LCAS) is a control mechanism that allow network service providers to dynamically increase or decrease the bandwidth of a Ethernet over SONET (EoS) link according to the network’s bandwidth demand. The key function of LCAS is to establish a messaging channel between the traffic sources and traffic sinks, so that bandwidth change can be done with minimal service interruption to the network. The PMC-Sierra ARROW 2xGE device is a dual port gigabit Ethernet mapper device. It was design and implemented prior to the publication of the LCAS specification, and the LCAS functionality was not implemented in this device. Recently, communication equipment builders have great demand for the LCAS functionality. For this project, the LCAS FPGA will be designed and implemented.