i-WABA: An efficient wavelengths arrangement and bandwidth allocation WDMA protocol for passive optical intra-rack data center networks
Abstract
In this article, we effectively handle the continuously growing traffic within data centers (DCs) and we focus on the intra-rack communication. We propose a passive optical intra-rack DC network (DCN) that uses a set of wavelengths for the data intra-rack communication and a separate control wavelength for pre-transmission coordination. We introduce a distributed access control scheme, named intra-rack wavelengths arrangement and bandwidth allocation (i-WABA) protocol, to effectively arrange the data wavelengths into groups and efficiently allocate them among the servers for transmission, avoiding synchronization complexity. The proposed i-WABA protocol ensures the collisions-free transmission over the data wavelengths and at destination achieving high performance, scalability, and reliability. In opposition to the majority of the state-of-the-art intra-rack MAC protocols that adopt synchronous transmission requiring strict time compliance, the proposed i-WABA protocol is unslotted providing simple and reliable access control even under high data rates. Moreover, unlike other studies that assume that the control communication is performed over an Ethernet link, the proposed intra-rack DCN considers that it is performed in the optical domain, ensuring its effective parallel operation to the data communication. The throughput improvement is extensively studied and it is proven to be an increasing function of the number of data wavelengths groups. Finally, the proposed intra-rack DCN along with the proposed i-WABA protocol is compared with other state-of-the-art intra-rack DCNs in terms of throughput, power consumption, and cost, while it is proven to be a performance, energy, and cost efficient DCN solution. © 2022 John Wiley & Sons, Ltd.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Position control for constrained Robots
Koumboulis, F. N. (1999)The problem of position control, for robot manipulators constrained to carry a load, is studied. Using a nonlinear P-D feedback law the design requirements of command matching and command following are proved to be always ... -
A case for systematic quality management in mosquito control programmes in Europe
Michaelakis A., Balestrino F., Becker N., Bellini R., Caputo B., della Torre A., Figuerola J., L’ambert G., Petric D., Robert V., Roiz D., Saratsis A., Sousa C.A., Wint W.G.R., Papadopoulos N.T. (2021)The recent spread of invasive mosquito species, such as Aedes albopictus and the seasonal sporadic transmission of autochthonous cases of arboviral diseases (e.g., dengue, chikungunya, Zika) in temperate areas, such as ... -
Stability analysis of the simplest Takagi-Sugeno fuzzy control system using circle criterion
Ban, X.; Gao, X. Z.; Huang, X.; Vasilakos, A. V. (2007)In this paper, we present two sufficient conditions in the frequency domain for the global stability analysis of the simplest Takagi-Sugeno (T-S) fuzzy control system, based on the circle criterion and its graphical ...