Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/08/01 Vol. E99-BNo. 8pp. 1772-1779 Type of Manuscript: Special Section PAPER (Special Section on Advanced Information and Communication Technologies and Services in Conjunction with Main Topics of APCC2015) Category: Fiber-Optic Transmission for Communications Keyword: colorless, directionless, intra-node contention, add/drop bank, wavelength usage ratio, transponder usage ratio,