The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Aug. 15, 2017

Filed:

May. 01, 2014
Applicant:

Ntt Docomo, Inc., Tokyo, JP;

Inventors:

Yasufumi Morioka, Tokyo, JP;

Kouki Hayashi, Tokyo, JP;

Yoshifumi Morihiro, Tokyo, JP;

Assignee:

NTT DOCOMO, INC., Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 36/34 (2009.01); H04M 3/487 (2006.01); H04W 36/00 (2009.01); H04W 64/00 (2009.01); H04W 36/32 (2009.01);
U.S. Cl.
CPC ...
H04W 36/34 (2013.01); H04M 3/487 (2013.01); H04W 36/00 (2013.01); H04W 36/32 (2013.01); H04W 64/00 (2013.01);
Abstract

A radio communication system includes: a visit information storage unit that stores plural visit information elements each indicating information on a visit to a cell visited by a user equipment; a cell visit detector that detects that the user equipment that was visiting a first cell starts a visit to a second cell differing from the first cell; a ping-ponging state determiner that determines whether a ping-ponging state has occurred, in which state start and ending of a visit to the second cell is repeated, wherein the determination is made based on a visit information element on a visit to the second cell visited by the user equipment; and a calculator that calculates a visit time length of the visit to the second cell in accordance with the determination by the ping-ponging state determiner.


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