Prosecution Insights
Last updated: May 29, 2026
Application No. 18/291,032

METHOD OF JOINT USER ACTIVITY DETECTION AND CHANNEL INFORMATION ESTIMATION IN EXTRA-LARGE MIMO (XL-MIMO) SYSTEMS WITH NON-STATIONARITIES

Non-Final OA §101§112
Filed
Jan 22, 2024
Priority
Jul 22, 2021 — DE 10 2021 207 876.1 +1 more
Examiner
WANG, HANNAH S
Art Unit
2631
Tech Center
2600 — Communications
Assignee
Continental Automotive Technologies GmbH
OA Round
2 (Non-Final)
50%
Grant Probability
Moderate
2-3
OA Rounds
1y 0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 50% of resolved cases
50%
Career Allowance Rate
56 granted / 113 resolved
-12.4% vs TC avg
Strong +53% interview lift
Without
With
+52.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
3 currently pending
Career history
116
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
96.9%
+56.9% vs TC avg
§102
1.1%
-38.9% vs TC avg
§112
0.6%
-39.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 113 resolved cases

Office Action

§101 §112
DETAILED ACTION 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 . The Amendment filed 11/20/2025 has been considered and entered. Claims 1-7 and 10-14 are still pending in this Office action. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 2 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being incomplete for omitting essential elements, such omission amounting to a gap between the elements. See MPEP § 2172.01. Applicants need to clarify that what is proceeded after ending a preamble and uplink data transmission via a grant-free random access. Claim 10 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being incomplete for omitting essential elements, such omission amounting to a gap between the elements. See MPEP § 2172.01. Applicants need to clarify that what is proceeded after ending a preamble and uplink data transmission via a grant-free random access. Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claim 1 is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. The claim(s) recite(s) the limitations, “performing a soft interference cancel check, whereby, if the soft interference cancel check result is negative, the calculation of residual mean and variance is performed and whereby, if the soft interference cancel check result is positive, the extrinsic mean and variance 1s calculated directly; calculating the extrinsic mean and variance, whereby, if the soft interference cancel check result is negative, the calculation of residual mean and variance is used; calculating tentative estimates, whereby the calculation of tentative estimation includes activity factors calculation; determining whether a condition of reaching a maximum is fulfilled whereby, if the condition of reaching the maximum fulfilled check result is negative, soft interference cancel check is performed and whereby, if the condition of reaching the maximum fulfilled check result is positive, performance of the method ends,” are mental process, the additional elements individually or as a whole do not integrate the judicial exception into a practical application. When considered a whole, the claimed invention fails to recite any improvement in any technology or technical field (MPEP 2106.05(a)) or recite any meaningful limitations (MPEP 2706.05(e)}. The limitations are no more than mere automation of joint user activity detection and channel information estimation. The claim does not recite additional elements that are sufficient to amount to significantly more than the abstract idea when considered both individually and as a whole. Specifically, the limitation, “receiving signals and initialization of a channel estimation” is just receiving and initializing a process, which is mere judicial-recognized well-understood, routine, conventional activity (MPEP 2106.05(a)). When considered a whole, the claimed invention still fails amount to significantly more than applying a judicial exception in a field of joint user activity detection and channel information estimation in extra-large Multiple-Input Multiple-Output (XL-MIMO) systems. Claims 2-6, considered each claim as a whole, fail to recite any further improvement in any technology or technical field (MPEP 2106.05(a)) or recite any meaningful limitations (MPEP 2706.05(e)}. The limitations are no more than mere automation of joint user activity detection and channel information estimation. Allowable Subject Matter Claims 7 and 10-14 are allowed. The following is a statement of reasons for the indication of allowable subject matter: Regarding claim 7, WANG et al. U.S. Patent Application Publication No. US 2012/0327757 A1, either singularly or in combination, cannot teach or suggest the following underlined uniquely distinct features used in combination with other claimed elements cited in the application claim “whereby if the soft interference cancel check result is negative the calculation of residual mean and variance is performed; and whereby if the soft interference cancel check result is positive the extrinsic mean and variance is calculated directly; calculating the extrinsic mean and variance, whereby, if the soft interference and cancel check result is negative, the calculation of residual mean and variance is used, calculating of tentative estimates, whereby the calculation of tentative estimation includes activity factors calculation, determining whether a condition of reaching a maximum is fulfilled, whereby if the condition of reaching the maximum fulfilled check result is negative, soft interference cancel check is performed, and whereby, if the condition of reaching the maximum fulfilled check result is positive the proceeding ends”. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KHANH C TRAN whose telephone number is (571)272-3007. The examiner can normally be reached Full Time Increase Flex Program. 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, Hannah S. Wang can be reached at 571-272-9018. 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. KCT /KHANH C TRAN/Primary Examiner, Art Unit 2631
Read full office action

Prosecution Timeline

Jan 22, 2024
Application Filed
May 21, 2025
Non-Final Rejection mailed — §101, §112
Nov 20, 2025
Response Filed
Dec 22, 2025
Non-Final Rejection mailed — §101, §112 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
50%
Grant Probability
99%
With Interview (+52.9%)
3y 5m (~1y 0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 113 resolved cases by this examiner. Grant probability derived from career allowance rate.

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