OPTICAL COMMUNICATION SYSTEM, OPTICAL COMMUNICATION METHOD, HIGHER-LEVEL DEVICE, AND OPTICAL LINE TERMINAL

WIPO Patent Application WO/2014/077168

A1

The purpose of the present invention is to provide a communication system comprising a higher-level device and a lower-level device which are connected via a PON system, said communication system transferring uplink data at a high speed from the lower-level device to the higher-level device such that strict requirements with regard to the time delay between the higher-level device and the lower-level device are met. This optical communication method is characterised by comprising in the following order: a scheduling execution step in which a higher-level device (1) schedules uplink communication, to the higher-level device (1), from one or a plurality of lower-level devices (5) that communicate with the higher-level device (1); and an uplink data transmission permission step in which the higher-level device (1) calculates and reports, to an OLT (2) that is connected at a lower level than the higher-level device (1) and connected via an optical fibre section (3) to one or a plurality of ONUs (4) connected at a higher level than the lower-level devices (5), an uplink data transmission time and permitted transmission amount from the ONUs (4) to the OLT (2) on the basis of the uplink communication scheduling.

KUWANO SHIGERU (JP)
TERADA JUN (JP)
IIYAMA NORIKO (JP)
SAKAMOTO TAKESHI (JP)
TANAKA NOBUYUKI (JP)
SHIGEMATSU SATOSHI (JP)

PCT/JP2013/080047

May 22, 2014

November 06, 2013

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NIPPON TELEGRAPH & TELEPHONE (JP)

H04L12/44

JP2011119850A	2011-06-16
JP2012151557A	2012-08-09
JP2012060503A	2012-03-22

OKADA, Kenji et al. (JP)
Kenji Okada (JP)

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