Title:
TRANSPORT DATA ASSIGNING METHOD AND OPTICAL COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/032276
Kind Code:
A1
Abstract:
[PROBLEMS] To provide an illumination light communication system and a transport data
assigning method capable of assigning, in a short time, data to be transmitted by
light sources in accordance with the correspondence of images of a light source group
projected to a light receiving element group. [MEANS FOR SOLVING PROBLEMS] The
light sources (11) of a transmitting end apparatus (1) sequentially emit respective
light pilot signals, and the light receiving elements (21) of a receiving end
apparatus (2) detect and hold the reception powers of the respective lights received
from the light sources (11). For the light receiving elements (21), a D/U ratio
is determined where D is a sum of k reception powers in decreasing order of value
and U is a sum of the other reception powers. If the D/U ratio is greater than a predetermined
value, an assignment of the same transport data is decided for the k light sources
(11). As to the light receiving elements (21) for which the D/U ratio is equal to
or smaller than the predetermined value, the number k is increased and the D/U
ratio is then determined for retrial. In this way, the transport data can be assigned
to the light sources (11) such that the light receiving elements (21) can receive
the respective different data.
Inventors:
NAKAGAWA MASAO (JP)
HARUYAMA SHINICHIRO (JP)
MIYAUCHI SATOSHI (JP)
HARUYAMA SHINICHIRO (JP)
MIYAUCHI SATOSHI (JP)
Application Number:
PCT/JP2006/317859
Publication Date:
March 22, 2007
Filing Date:
September 08, 2006
Export Citation:
Assignee:
NAKAGAWA LAB INC (JP)
NAKAGAWA MASAO (JP)
HARUYAMA SHINICHIRO (JP)
MIYAUCHI SATOSHI (JP)
NAKAGAWA MASAO (JP)
HARUYAMA SHINICHIRO (JP)
MIYAUCHI SATOSHI (JP)
International Classes:
H04B10/11; H01L31/12; H04B10/116; H04B10/524; H04B10/54
Foreign References:
| JPH11252018A | 1999-09-17 | |||
| JP2005006017A | 2005-01-06 | |||
| JPH08237204A | 1996-09-13 | |||
| JP2001333005A | 2001-11-30 | |||
| JP2004064465A | 2004-02-26 |
Attorney, Agent or Firm:
KAKO, Susumu (Maison Sunshine 1-4, Higashiikebukuro 3-chom, Toshima-ku Tokyo, JP)
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