Title:
ALLOCATION OF UPSTREAM BANDWIDTH IN AN ETHERNET PASSIVE OPTICAL NETWORK
Document Type and Number:
WIPO Patent Application WO2003007518
Kind Code:
A3
Abstract:
A passive optical network (PON) in accordance with the invention uses a superframe having a number of subframes (410A-410N) arranged in two-dimensional array, wherein for normal data transfer subframes are allocated to each optical network unit (ONU) column by column, left to right, and within each column subframes are allocated from top to the bottom. Initially, for ranging, at least two subframes are allocated to an ONU, adjacent to a diagonal of the superframe (which may go from the top left corner of the superframe to the bottom right corner, or alternatively from the top right corner to the bottom left corner). In some embodiments, instead of allocating subframes column by column, the subframes are evenly spaced apart from one another (411B), and conflicts with a previous allocation are resolved by adjustment, and optionally an evaluation function may be used to find an optimal allocation.
Inventors:
SHI HAIXING
HE YING
HE YING
Application Number:
PCT/US2002/021681
Publication Date:
April 10, 2003
Filing Date:
July 09, 2002
Export Citation:
Assignee:
SALIRA OPTICAL NETWORK SYSTEMS (US)
International Classes:
H04J3/16; H04L12/56; H04Q11/00; (IPC1-7): H04J3/16; H04J3/22
Foreign References:
| US6081519A | 2000-06-27 | |||
| US5790523A | 1998-08-04 |
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