DYNAMIC WAVELENGTH ALLOCATION METHOD FOR MINIMUM TURNING IN STACKED TIME- AND WAVELENGTH-DIVISION MULTIPLEXED OPTICAL ACCESS NETWORK

WIPO Patent Application WO/2016/183972

A1

The present invention relates to the technical field of optical access networks. Disclosed is a dynamic wavelength allocation method applicable to minimum tuning in a TWDM-PON. An optical line terminal (OLT) groups optical network units (ONU) according to transmission wavelengths thereof. Before authorization of a polling cycle begins, the OLT collects bandwidth requests of all the ONUs and sorts the requests within a group in a descending order. Firstly, a wavelength which is free first is selected. Secondly, the wavelength is preferentially allocated to an ONU which performs transmission at the wavelength in a previous cycle, and a transmission data window thereof is assigned. The wavelength tuning frequency of an ONU can be reduced using an MWT wavelength allocation algorithm, and therefore the time delay of a system is favorably reduced. Meanwhile, the energy consumption caused by a tuning process is reduced, and the method better conforms to an environmental protective concept.

WANG HONGXIANG (CN)
SU SUYAN (CN)
JI YUEFENG (CN)

PCT/CN2015/089485

November 24, 2016

September 14, 2015

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UNIV BEIJING POSTS & TELECOMM (CN)
WANG HONGXIANG (CN)
SU SUYAN (CN)
JI YUEFENG (CN)

H04J14/02

CN104901762A	2015-09-09
CN103888382A	2014-06-25
CN101467366A	2009-06-24

WANG, HONGXIANG ET AL.: "A MINIMUM WAVELENGTH TUNING SCHEME FOR DYNAMIC WAVELENGTH ASSIGNMENT IN TWDM-PON", 2015 14 TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN, 5 July 2015 (2015-07-05), XP055330436

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