Capacity analysis for WDMm fiber-radio backbones with star-tree and ring architecture incorporating wavelength interleaving

Reliable architecture for high-capacity fiber-radio systems

“…For the ring architecture demonstrated in [4], the reliability is worse than ours since there is only one single-ring protection for the network. The star or tree architectures in [1] exhibited poor reliability because they do not even equip with any self-healing function. However, the reliability does not come without cost.…”

“…Wavelength-division multiplexing (WDM) is a powerful and cost-effective technique to increase the network capacity, reconfigurability, and best use of the huge bandwidth provided in fiber. However, conventional WDM fiber-radio systems with star or tree architectures, whose connectivity between optical line terminal (OLT) and optical network units (ONUs) is obtained using an optical multiplexer [1,2], do not provide selfhealing functions to provide sufficient quality of service (QoS). Compared with the ring architectures [3,4], the star or tree architectures are more vulnerable to single point failures because of its topology and the lack of an alternative redundant path.…”

Coherent detection of wavelength division multiplexed phase-modulated Radio-over-Fibre signals

“…Radio-over-Fibre systems employing WavelengthDivision-Multiplexing (WDM) are very attractive since they can support a large number of antenna base stations connected to a central station [1]. It is believed that WDM RoF technology can potentially enable increased overall capacity, low-cost antenna base station implementation, increased wireless access coverage and easier network maintenance [1,2].…”

“…It is believed that WDM RoF technology can potentially enable increased overall capacity, low-cost antenna base station implementation, increased wireless access coverage and easier network maintenance [1,2]. Recently, phase-modulated RoF optical links have attracted large attention due to their advantages compared to intensity modulation [3,4].…”

Capacity and expanding method of ROF system with bus link topology

“…Radio Over Fibre (ROF) technique has provided a promising scheme to realize the network [1] . The ROF technology can move the radio signal-processing and routing functions to the central station (CS), allowing the base stations (BSs) to share the resources, thereby simplifying the network architecture.…”