Prosecution Insights
Last updated: July 17, 2026
Application No. 18/534,419

SUPPORT OF TOEPLITZ-BASED CSI FEEDBACK/REPORTING METHODS

Final Rejection §103
Filed
Dec 08, 2023
Priority
Dec 22, 2022 — provisional 63/434,759 +1 more
Examiner
OHRI, ROMANI
Art Unit
2413
Tech Center
2400 — Computer Networks
Assignee
Samsung Electronics Co., Ltd.
OA Round
2 (Final)
85%
Grant Probability
Favorable
3-4
OA Rounds
2m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allowance Rate
393 granted / 460 resolved
+27.4% vs TC avg
Strong +16% interview lift
Without
With
+16.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
24 currently pending
Career history
491
Total Applications
across all art units

Statute-Specific Performance

§101
2.4%
-37.6% vs TC avg
§103
87.0%
+47.0% vs TC avg
§102
2.9%
-37.1% vs TC avg
§112
4.2%
-35.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 460 resolved cases

Office Action

§103
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . DETAILED ACTION Response to Amendment Applicant’s amendment, filed 03/09/2026, has been entered and carefully considered. Claims 1, 2, 8, 9, and 15-17 are amended. Claims 1-20 are currently pending. The 35 U.S.C. 112 (pre-AIA ), second paragraph rejection of claims 1-20 is withdrawn in light of applicant’s amendments to claims. Information Disclosure Statement The information disclosure statement (IDS) submitted on 01/30/2026 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Response to Arguments Applicant’s arguments filed 03/09/2026 with respect to claim(s) 1-20 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102 of this title, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1, 8 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Narayanan et al. al (US 20250016593 A1). Regarding claim 1 Narayanan discloses a user equipment (UE), comprising: a transceiver configured to (Fig. 1B discloses that WTRU includes a transceiver (120)): receive CSI reference signals (RSs) (Paragraph 0371 discloses that the WTRU may generate a CSI report comprising the CSI measurement based on atleast one reference signal); and a processor operably coupled to the transceiver, the processor configured to: (Paragraph 0388 discloses measuring Channel State Information (CSI) associated with at least one reference signal) measure the CSI-RSs (Paragraphs 0187-0188 disclose a CSI reporting with AIML based CSI compression may be determined based on any of the following: Number of layers used or implemented for the associated AIML model, Input dimension (e.g., number of bits, number of samples, number of time samples aggregated, number of frequency samples aggregated etc. Paragraph 0371 discloses measuring the CSI-RS) and determine, based on the configuration information and the measured CSI-RSs, a CSI report, wherein the transceiver is configured to transmit the CSI report (Paragraph 0388 discloses the WTRU may transmit the report comprising the CSI associated with the at least one reference signal. Paragraph 0350 discloses that the WTRU may generate one or more CSI or parts thereof based on determined matrix method as described above in paragraph 0147 and transmit the CSI report using transmission resources). Narayanan does not explicltiy discloses transmit capability information indicating a capability of the UE to support a Toeplitz-based method of determining channel state information (CSI) reports; receive configuration information that indicates parameters for the Toeplitz-based method of determining the CSI reports. wherein the Toeplitz-based method is based on a dual-stage precoding structure including a first component W1 and a second component W2, and wherein at least some of the parameters are to identify at least a first row and a first column of a Toeplitz codebook corresponding to W1. In an analogous art, Zhang discloses transmit capability information indicating a capability of the UE (Col 13. Discloses a receiving device (e.g., a UE 115) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or signal quality measurements etc.) to support a Toeplitz-based method of determining channel state information (CSI) reports (Col. 18, lines 1-30 discloses UE may determine a channel estimation matrix between the UEs, and may decompose the channel estimation matrix into x-dimension and y-dimension sub-matrices corresponding to the x and y dimensions of the channel estimation matrix. Decomposing the channel estimation matrix may enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices); receive configuration information that indicates parameters for the Toeplitz-based method of determining the CSI reports (Col. 18, lines 1-30 discloses UE may determine a channel estimation matrix between the UEs, and may decompose the channel estimation matrix into x-dimension and y-dimension sub-matrices corresponding to the x and y dimensions of the channel estimation matrix. Decomposing the channel estimation matrix may enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices. The symmetric Toeplitz properties of the sub-matrices may enable the first wireless device 205-a to solve the eigenvectors/precoders of the sub-matrices in a less computationally intensive manner, which may reduce a complexity at the first wireless device 205-a and reduce processing power and resources required to solve for the precoders/eigenvectors. Col. 21, lines 45-60, Upon determining the precoders/eigenvectors for the LoS MIMO communication 230 based on the sub-matrices, the first wireless device 205-a may transmit, to the second wireless device 205-b, an indication of a set of precoders 225 which are to be used for the LoS MIMO communication 230. In other words, the first wireless device 205-a may transmit an indication of the eigenvectors/precoders 225 which were determined based on the symmetric Toeplitz sub-matrices. Subsequently, the second wireless device 205-b may transmit the LoS MIMO communication 230 using the rectangular antenna array 215-b and the indicated set of precoders 225); wherein the Toeplitz-based method is based on a dual-stage precoding structure including a first component W1 and a second component W2, and wherein at least some of the parameters are to identify at least a first row and a first column of a Toeplitz codebook corresponding to W1 (Col. 21, lines 45-60, Upon determining the precoders/eigenvectors for the LoS MIMO communication 230 based on the sub-matrices, the first wireless device 205-a may transmit, to the second wireless device 205-b, an indication of a set of precoders 225 which are to be used for the LoS MIMO communication 230. In other words, the first wireless device 205-a may transmit an indication of the eigenvectors/precoders 225 which were determined based on the symmetric Toeplitz sub-matrices. Subsequently, the second wireless device 205-b may transmit the LoS MIMO communication 230 using the rectangular antenna array 215-b and the indicated set of precoders 225). Col. 20 discloses the channel estimation matrix using the Toeplitz matrices, see matrix 18 on Col. 20). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the technique of Zhang to the system of Narayanan to provide a technique of channel estimation matrix that enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices), effectively reducing the degrees of freedom of the sub-matrices and allowing for less computationally-expensive solving (Summary). Regarding claim 15, claim 15 comprises substantially similar limitations as described above in claim 1 claimed as a method perform by a UE as disclosed in claim 1. Regarding claim 8, Narayanan discloses a base station (BS), comprising: a processor; and a transceiver operably coupled to the processor, the transceiver configured to (¶0041 discloses that the eNode- Bs 160 a, 160 b, 160 c may each include one or more transceivers for communicating with the WTRUs 102 a, 102 b, 102 cover the air interface 116 (Fig. 1C)): and receive CSI reference signals (RSs) (Paragraph 0371 discloses that the WTRU may generate a CSI report comprising the CSI measurement based on atleast one reference signal), transmit CSI reference signals (RSs) (Paragraph 0371 discloses that the WTRU may generate a CSI report comprising the CSI measurement based on atleast one reference signal. Paragraphs 0187-0188 disclose a CSI reporting with AIML based CSI compression may be determined based on any of the following: Number of layers used or implemented for the associated AIML model, Input dimension (e.g., number of bits, number of samples, number of time samples aggregated, number of frequency samples aggregated etc. Paragraph 0371 discloses measuring the CSI-RS), and receive the CSI report that is based on the configuration information and the CSI- RSs (Paragraph 0388 discloses the WTRU may transmit the report comprising the CSI associated with the at least one reference signal. Paragraph 0350 discloses that the WTRU may generate one or more CSI or parts thereof based on determined matrix method as described above in paragraph 0147 and transmit the CSI report using transmission resources). Narayanan does not explicltiy discloses receive capability information indicating a capability of a user equipment (UE) to support a Toeplitz-based method of determining channel state information (CSI) reports, transmit configuration information that indicates parameters for the Toeplitz-based method of determining the CSI reports. wherein the Toeplitz-based method is based on a dual-stage precoding structure including a first component W1 and a second component W2, and wherein at least some of the parameters are to identify at least a first row and a first column of a Toeplitz codebook corresponding to W1. In an analogous art, Zhang discloses receive capability information indicating a capability of the UE (Col 13. Discloses a receiving device (e.g., a UE 115) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or signal quality measurements etc.) to support a Toeplitz-based method of determining channel state information (CSI) reports (Col. 18, lines 1-30 discloses UE may determine a channel estimation matrix between the UEs, and may decompose the channel estimation matrix into x-dimension and y-dimension sub-matrices corresponding to the x and y dimensions of the channel estimation matrix. Decomposing the channel estimation matrix may enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices); transmit configuration information that indicates parameters for the Toeplitz-based method of determining the CSI reports (Col. 18, lines 1-30 discloses UE may determine a channel estimation matrix between the UEs, and may decompose the channel estimation matrix into x-dimension and y-dimension sub-matrices corresponding to the x and y dimensions of the channel estimation matrix. Decomposing the channel estimation matrix may enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices. The symmetric Toeplitz properties of the sub-matrices may enable the first wireless device 205-a to solve the eigenvectors/precoders of the sub-matrices in a less computationally intensive manner, which may reduce a complexity at the first wireless device 205-a and reduce processing power and resources required to solve for the precoders/eigenvectors. Col. 21, lines 45-60, Upon determining the precoders/eigenvectors for the LoS MIMO communication 230 based on the sub-matrices, the first wireless device 205-a may transmit, to the second wireless device 205-b, an indication of a set of precoders 225 which are to be used for the LoS MIMO communication 230. In other words, the first wireless device 205-a may transmit an indication of the eigenvectors/precoders 225 which were determined based on the symmetric Toeplitz sub-matrices. Subsequently, the second wireless device 205-b may transmit the LoS MIMO communication 230 using the rectangular antenna array 215-b and the indicated set of precoders 225); wherein the Toeplitz-based method is based on a dual-stage precoding structure including a first component W1 and a second component W2, and wherein at least some of the parameters are to identify at least a first row and a first column of a Toeplitz codebook corresponding to W1 (Col. 21, lines 45-60, Upon determining the precoders/eigenvectors for the LoS MIMO communication 230 based on the sub-matrices, the first wireless device 205-a may transmit, to the second wireless device 205-b, an indication of a set of precoders 225 which are to be used for the LoS MIMO communication 230. In other words, the first wireless device 205-a may transmit an indication of the eigenvectors/precoders 225 which were determined based on the symmetric Toeplitz sub-matrices. Subsequently, the second wireless device 205-b may transmit the LoS MIMO communication 230 using the rectangular antenna array 215-b and the indicated set of precoders 225). Col. 20 discloses the channel estimation matrix using the Toeplitz matrices, see matrix 18 on Col. 20). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the technique of Zhang to the system of Narayanan to provide a technique of channel estimation matrix that enable the UE to generate smaller sub-matrixes which exhibit symmetry (e.g., symmetric Toeplitz matrices), effectively reducing the degrees of freedom of the sub-matrices and allowing for less computationally-expensive solving (Summary). Allowable Subject Matter Claims 2-7, 9-14 and 16-20 and objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: Chung et al. (US 2021/0266769 A1) discloses in Fig. 9, a method of configuring indication information (or indicator) for each specific unit (e.g., for each specific resource unit or specific time unit in a time domain and indicating and configuring a time domain behavior of a UE based on the indication information. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROMANI OHRI whose telephone number is (571)272-5420. The examiner can normally be reached 8:00am-5:00pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, UN C CHO can be reached at 5712727919. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ROMANI OHRI/Primary Examiner, Art Unit 2413
Read full office action

Prosecution Timeline

Dec 08, 2023
Application Filed
Dec 10, 2025
Non-Final Rejection mailed — §103
Mar 09, 2026
Response Filed
May 29, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

3-4
Expected OA Rounds
85%
Grant Probability
99%
With Interview (+16.1%)
2y 9m (~2m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 460 resolved cases by this examiner. Grant probability derived from career allowance rate.

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