Please wait...



Goto Application


Disclaimer The image version (PDF) available on PATENTSCOPE is the official version. This online html version is provided to assist users. Despite the great care taken in its compilation to ensure a precise and accurate representation of the data appearing on the printed document/images, errors and/or omissions cannot be excluded due to the data transmittal, conversion and inherent limitations of the (optional) machine translation processes used. Hyperlinks followed by this symbol , are to external resources that are not controlled by WIPO. WIPO disclaims all liability regarding the above points.

Part 1:  1  2  3  4  5  6          Part 2:  A  B  C  D  E 
International application No. Applicant's or agent's file reference
PCT/KR2019/003690 OEC12071PCT
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
29 March 2019 07 December 2018
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.
6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     2    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
none of the figures is to be published with the abstract.


     H04L 12/18 (2006.01)i; H04L 29/12 (2006.01)i; H04L 1/00 (2006.01)i; H04L 1/08 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
한국등록실용신안공보 및 한국공개실용신안공보: 조사된 최소문헌란에 기재된 IPC
일본등록실용신안공보 및 일본공개실용신안공보: 조사된 최소문헌란에 기재된 IPC
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
eKOMPASS(KIPO internal) & Keywords: error, fail, multicast address, change, retransmit


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 2014-0359389 A1 (TIME WARNER CABLE ENTERPRISES LLC) 04 December 2014 See paragraphs [0043], [0091], [0094], [0096], [0098], [0103], [0154], [0165]-[0166], [0170]-[0171]; and figure 4.
US 2010-0098079 A1 (TERUYUKI HASEGAWA et al.) 22 April 2010 See paragraphs [0044], [0063], [0067]; claims 9, 11; and figure 8.
US 2014-0140343 A1 (FUJITSU LIMITED) 22 May 2014 See paragraphs [0156]-[0169]; and claim 7.
US 2017-0339047 A1 (VERIZON DIGITAL MEDIA SERVICES INC.) 23 November 2017 See paragraphs [0037]-[0038], [0050]-[0058]; and figures 4, 7.
US 2011-0161765 A1 (DAVID R. ORAN) 30 June 2011 See paragraphs [0022]-[0030]; and figure 2.
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
document cited by the applicant in the international application
earlier application or patent but published on or after the international filing date
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
document referring to an oral disclosure, use, exhibition or other means
document published prior to the international filing date but later than the priority date claimed
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
document member of the same patent family


Patent document cited in search report Publication date
Patent family member(s) Publication date
US 2014-0359389 A1
04 December 2014
US 2015-0046959 A1
US 10277930 B2
US 2018-0184143 A1
US 8813144 B2
US 9621934 B2
US 10015533 B2
US 2012-0180101 A1
12 February 2015
30 April 2019
28 June 2018
19 August 2014
11 April 2017
03 July 2018
12 July 2012
US 2010-0098079 A1
22 April 2010
JP 4060281 B2
JP 2005-252670 A
US 7689644 B2
US 8116313 B2
US 2005-0195818 A1
12 March 2008
15 September 2005
30 March 2010
14 February 2012
08 September 2005
US 2014-0140343 A1
22 May 2014
JP 6102214 B2
JP 2014-107595 A
US 9438437 B2
29 March 2017
09 June 2014
06 September 2016
US 2017-0339047 A1
23 November 2017
US 9736059 B2
US 2016-0294678 A1
US 9787579 B2
US 2018-0324084 A1
US 2016-0294677 A1
US 2016-0294681 A1
US 10033628 B2
15 August 2017
06 October 2016
10 October 2017
08 November 2018
06 October 2016
06 October 2016
24 July 2018
US 2011-0161765 A1
30 June 2011
CN 101473571 A
CN 101473571 B
EP 2062384 A2
EP 2062384 A4
EP 2062384 B1
EP 2070067 A2
US 2014-0029628 A1
US 2012-0189007 A1
US 2008-0256409 A1
US 2008-0253369 A1
US 2008-0062990 A1
US 9083585 B2
US 8711854 B2
US 8588077 B2
US 7681101 B2
US 8031701 B2
WO 2008-033645 A2
WO 2008-033644 A3
WO 2008-033644 A2
WO 2008-033645 A3
01 July 2009
13 November 2013
27 May 2009
04 October 2017
04 October 2017
17 June 2009
30 January 2014
26 July 2012
16 October 2008
16 October 2008
13 March 2008
14 July 2015
29 April 2014
19 November 2013
16 March 2010
04 October 2011
20 March 2008
02 October 2008
20 March 2008
27 November 2008
Name and mailing address of the ISA/:
Korean Intellectual Property Office
189 Cheongsa-ro, Seo-gu, Daejeon Metropolitan City, 302-701
Republic of Korea
Facsimile No. +82-42-481-8578
Date of the actual completion of the international search:
06 September 2019
Date of mailing of the international search report:
06 September 2019
Authorized officer:
CHIN, Sang Bum
Telephone No. +82-42-481-8398
Top    Part 1: 1 2 3 4 5 6         Part 2: A B C D E