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.
Patent No.:
Date of Patent:
Mar. 26, 2024
Filed:
Sep. 12, 2018
Applicant:
Ntt Docomo, Inc., Tokyo, JP;
Inventors:
Kenichiro Aoyagi, Tokyo, JP;
Hiroshi Ishikawa, Tokyo, JP;
Atsushi Minokuchi, Tokyo, JP;
Shinya Takeda, Tokyo, JP;
Assignee:
NTT DOCOMO, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 48/20 (2009.01); H04W 36/00 (2009.01); H04W 48/16 (2009.01);
U.S. Cl.
CPC ...
H04W 48/16 (2013.01); H04W 36/0022 (2013.01); H04W 48/20 (2013.01);
Abstract
In 5G cell () of 5G system (), upon detecting that access to the 5G system () is barred, the 5G system () is congested, 5G core network () of the 5G system () does not support IMS-type communication service, or fallback to 4G system () is instructed, UE () selects 4G cell () of the 4G system () as a target cell for connection. The UE () transmits a connection request signal for the IMS-type communication service to the target cell for connection.