How Ethernet Passive Optical Network Technology Is Utilized in Implementing Fiber to The Home/Curb/ Building Solutions for Last Mile Bandwidth Bottleneck Problems Free Essay Example, 3000 words

In order to increase transmission efficiency in an EPON system, the upstream and downstream transmission channels should ideally be separated. One simple solution is to utilize space division multiplexing, where two separate optical fibers and passive couplers are used for upstream and downstream transmissions. However, there is a more cost-effective solution. This is by using different wavelengths for upstream and downstream transmissions. Typically, a 1550 nm wavelength is used for downstream transmission and a 1310 nm wavelength is used for upstream transmission [2]. In the upstream direction of an EPON system, multiple ONUs transmit data packets to the OLT through a common passive combiner and share the same optical fiber from the combiner to the OLT. The passive combiner has a directional property so the data packets from an ONU can only reach the OLT but not the other ONUs. Conventional contention-based multiple access such as the carrier sense multiple access with collision d etection (CSMA/CD) protocol, is difficult to implement because the ONUs is unable to easily detect a collision that may occur at the OLT. Although the OLT is able to detect a collision and inform the ONUs by sending a collision message, the transmission efficiency is reduced because of considerable propagation delay between the OLT and the ONUs. We will write a custom essay sample on How Ethernet Passive Optical Network Technology Is Utilized in Implementing Fiber to The Home/Curb/ Building Solutions for Last Mile Bandwidth Bottleneck Problems or any topic specifically for you Only $17.96 $11.86/page