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1. (WO2019032881) SELF-DECODABLE RETRANSMISSION FOR LDPC CODE BASED HARQ SYSTEMS



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INTERNATIONAL SEARCH REPORT (ISR)
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/US2018/046083 PN468WO93519
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
09 August 2018 11 August 2017
Applicant
QUALCOMM INCORPORATED
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)).
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)).
c.
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:
SELF-DECODABLE RETRANSMISSION FOR LDPC CODE BASED HARQ SYSTEMS

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.

Methods, systems, and devices for wireless communication are described. In some examples, a wireless device (e.g., a user equipment (UE) or a base station) may encode a codeword from a set of information bits using an LDPC code. The wireless device may then transmit multiple versions of the codeword to improve the chances of the codeword being received. In some aspects, the wireless device may use the techniques herein to generate self- decodable redundancy versions of the codeword to be transmitted to the receiving device. Accordingly, a receiving device may be able to identify information bits from one or more redundancy versions of the codeword even if the receiving device failed to receive an original transmission of the codeword. Specifically, the wireless device may re-order bits in an encoded bit stream for a retransmission before storing these bits in a circular buffer. Once the bits are re-ordered and stored in the circular buffer, the wireless device may select bits from the buffer and transmit the selected bits to the receiving device. By re-ordering bits in the encoded bit stream, the wireless device may ensure that sets of information bits are distributed evenly across the selected bits. Accordingly, when the wireless device selects bits from the circular buffer for the retransmission, the retransmission may include sufficient systematic bits to enable the retransmission to be decoded by the receiving device with or without being combined with an original transmission.


6. Drawings
a.
The figure of the drawings to be published with the abstract is Figure No.     8    
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.
b.
none of the figures is to be published with the abstract.

A. CLASSIFICATION OF SUBJECT MATTER

     H03M 13/11 (2006.01)i; H03M 13/27 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC

B. FIELDS SEARCHED

Minimum documentation searched (classification system followed by classification symbols):
     H03M; H04L
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
EPO-Internal, WPI Data

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
(1)
X
QUALCOMM INCORPORATED, "LDPC Rate Matching", Vol. RAN WG1, No. Qingdao, China; 20170627 - 20170630, 26 June 2017 (2017-06-26), 3GPP DRAFT; R1-1711212_LDPC RATE_MATCHING, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE
Retrieved from the Internet:
URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/
XP051300411
[retrieved on  2017-06-26]
1-8,12-24,27-30
A
the whole document
9-11,25,26
(2)
X
QUALCOMM INCORPORATED, "LDPC rate compatible design", Vol. RAN WG1, No. Spokane, USA; 20170116 - 20170120, 16 January 2017 (2017-01-16), 3GPP DRAFT; R1-1700830_LDPC_RATE_COMPATIBLE_DESIGN, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE
Retrieved from the Internet:
URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/
XP051208349
[retrieved on  2017-01-16]
1,17,29,30
the whole document
(3)
X
WO 2017123273 A1 (INTEL IP CORP [US]) 20 July 2017 (2017-07-20)
1,3-5,17,19-21,29,30
figures 4,9
paragraph [0002]
paragraph [0059]
paragraph [0072] - paragraph [0073]
(4)
X
ERICSSON, "Bit Ordering for Circular Buffer of LDPC Codes", Vol. RAN WG1, No. Qingdao, P.R. China; 20170627 - 20170630, 26 June 2017 (2017-06-26), 3GPP DRAFT; R1-1710484 BIT ORDERING FOR CIRCULAR BUFFER OF LDPC CODES, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ;
Retrieved from the Internet:
URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/
XP051299695
[retrieved on  2017-06-26]
1,7,14-17,23,28-30
the whole document
(5)
X,P
QUALCOMM INCORPORATED, "LDPC Rate Matching", Vol. RAN WG1, No. Prague, Czech Republic; 20170821 - 20170825, 20 August 2017 (2017-08-20), 3GPP DRAFT; R1-1713462_LDPC RATE_MATCHING, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE
Retrieved from the Internet:
URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/
XP051316263
[retrieved on  2017-08-20]
1-30
the whole document
(6)
A
HUAWEI ET AL, "On rate matching for LDPC codes", Vol. RAN WG1, No. Spokane, USA; 20170403 - 20170407, 25 March 2017 (2017-03-25), 3GPP DRAFT; R1-1704253, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE
Retrieved from the Internet:
URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_88b/Docs/
XP051251062
[retrieved on  2017-03-25]
14,15,28
the whole document
*
Special categories of cited documents:
"A"
document defining the general state of the art which is not considered to be of particular relevance
"E"
earlier application or patent but published on or after the international filing date
"L"
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)
"O"
document referring to an oral disclosure, use, exhibition or other means
"P"
document published prior to the international filing date but later than the priority date claimed
"T"
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
"X"
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
"Y"
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

D. INFORMATION ON PATENT FAMILY MEMBERS

Patent document cited in search report Publication date
(day/month/year)
Patent family member(s) Publication date
(day/month/year)
WO 2017123273 A1
20 July 2017
CN 108432167 A
TW 201733276 A
WO 2017123273 A1
21 August 2018
16 September 2017
20 July 2017
Name and mailing address of the ISA/:
European Patent Office
P.B. 5818, Patentlaan 2, 2280 HV Rijswijk,
Netherlands
Telephone No. (+31-70)340-2040
Facsimile No. (+31-70)340-3016
Date of the actual completion of the international search:
17 October 2018
Date of mailing of the international search report:
30 October 2018
Authorized officer:
Offer, Elke
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