Prosecution Insights
Last updated: April 19, 2026
Application No. 18/559,187

REFERENCE SIGNALING FOR WIRELESS COMMUNICATION

Non-Final OA §101§102§103§112
Filed
Nov 06, 2023
Examiner
SEFCHECK, GREGORY B
Art Unit
2477
Tech Center
2400 — Computer Networks
Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
OA Round
1 (Non-Final)
69%
Grant Probability
Favorable
1-2
OA Rounds
3y 8m
To Grant
89%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allow Rate
469 granted / 677 resolved
+11.3% vs TC avg
Strong +20% interview lift
Without
With
+20.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
59 currently pending
Career history
736
Total Applications
across all art units

Statute-Specific Performance

§101
3.7%
-36.3% vs TC avg
§103
56.9%
+16.9% vs TC avg
§102
22.6%
-17.4% vs TC avg
§112
7.5%
-32.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 677 resolved cases

Office Action

§101 §102 §103 §112
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Priority as a 371 of PCT/SE2021/050440 filed 5/10/2021 is acknowledged. Preliminary Amendment filed 11/6/2023 is acknowledged. Claims 1-13 have been amended, claim 14 has been cancelled, and claims 15-21 have been newly added. Claims 1-13 and 15-21 remain pending. Information Disclosure Statement The information disclosure statement (IDS) submitted on 12/19/2023 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. 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. Claims 2 and 4 are rejected under 35 U.S.C. 112(b) as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. Claims 2 and 4 are directed to an apparatus/node that is configured to perform certain functionality of transmitting and receiving without any positively-recited limitations defining the structure or components making up the apparatus. Therefore, the claims are held to be indefinite. 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 13 is rejected under 35 U.S.C. 101 because the claimed invention is directed to non-statutory subject matter. The claim does not fall within at least one of the four categories of patent eligible subject matter because the claimed “computer storage medium” could be construed to include carrier mediums, i.e. transitory signals, that store a computer program, as described in paragraphs 54 and 90 of the application as originally filed. Adding “non-transitory” to the preamble would obviate the rejection. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 1-6, 8, 9, 12, 13, 15, 16, 18, and 19 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Li et al. (US20190327065A1), hereafter Li. Regarding claims 1, 2, and 13, Li (Title: Reference Signal Sending and Receiving Methods and Apparatus) discloses a method (Fig. 2) of operating a signaling radio node in a wireless communication network (Fig. 1; Background) and computer storage medium (Fig. 13, memory 1303) storing a computer program comprising instructions (paragraph 271) causing processing circuitry (Fig. 13, processor 1301) to control and perform a method of transmitting reference signaling (Fig. 2, step 202) having a pattern comprising, in a time domain, N blocks, each block comprising a plurality of symbols (Fig. 3, first reference signal over 4 symbols; second reference signal over 2 symbols), wherein for each symbol of a first block of the N blocks (Fig. 3, first reference signal), the reference signaling is transmitted having a first frequency domain distribution (Fig. 3, first reference signal in 30 kHz spaced sub-band), and for each symbol of a second block of the N blocks (Fig. 3, second reference signal), the reference signaling is transmitted having a second, different frequency domain distribution (Fig. 3, second reference signal in 15 kHz spaced subband). Regarding claims 3 and 4, Li discloses a method (Fig. 2) of operating a feedback radio node in a wireless communication network (Fig. 1; Background) configured to/for receiving reference signaling (Fig. 2, step 203) having a pattern comprising, in a time domain, N blocks, each block comprising a plurality of symbols (Fig. 3, first reference signal over 4 symbols; second reference signal over 2 symbols), wherein for each symbol of a first block of the N blocks (Fig. 3, first reference signal), the reference signaling is transmitted having a first frequency domain distribution (Fig. 3, first reference signal in 30 kHz spaced sub-band), and for each symbol of a second block of the N blocks (Fig. 3, second reference signal), the reference signaling is transmitted having a second, different frequency domain distribution (Fig. 3, second reference signal in 15 kHz spaced subband). Regarding claims 5 and 15, Li discloses the N blocks are pairwise neighbouring in time (Fig. 3; paragraph 206) or between a pair of blocks, there is inserted a guard period (paragraph 159). Regarding claims 6 and 16, Li discloses each of the N blocks comprise M symbols (Fig. 3; each of first/second reference signal across plurality of symbols). Regarding claims 8 and 18, Li discloses the reference signaling is CSI-RS (paragraph 3). Regarding claims 9 and 19, Li discloses the reference signaling for neighbouring blocks is transmitted having different frequency domain distributions (Fig. 3 as described above; first reference signal in 30 kHz spaced sub-band; second reference signal in 15 kHz spaced subband). Regarding claim 12, Li discloses one or more of the first frequency distribution, the second frequency distribution, and the frequency distributions are shifted relative to each other (i.e. offsets of each respective reference signal; Fig. 3; paragraph 28, 53, 158, 165, 172, 206-216, 225-226). 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, 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. Claims 7 and 17 are rejected under 35 U.S.C. 103 as being unpatentable over Li in view of Hajri et al. (US20230361842A1), hereafter Hajri. Regarding claims 7 and 17, Li does not expressly disclose the reference signaling of different blocks are associated to different transmission beams. Hajri discloses analogous art including reference signaling of different blocks are associated to different transmission beams (Fig. 2A; paragraph 114; multiplexing CSI-RS symbols corresponding to different beams). It would have been obvious to one of ordinary skill in the art before the time of effective filing to modify Li by including reference signaling of different blocks are associated to different transmission beams, as shown by Hajri, thereby enabling the UE to estimate the effective channel frequency response for each of multiple CSI-RS ports corresponding to different beams. Claims 10 and 20 are rejected under 35 U.S.C. 103 as being unpatentable over Li in view of Xiao et al. (US20210359819A1), hereafter Xiao. Regarding claims 10 and 20, Li does not expressly show one or more of the first frequency distribution, the second frequency distribution and the frequency distributions associated to the blocks correspond to combs. Xiao discloses analogous art (Title: Sounding Reference Signal Transmission and Reception) including one or more of the first frequency distribution, the second frequency distribution and the frequency distributions associated to the blocks correspond to combs (paragraph 41; OFDM symbols in SRS resource including transmission comb, comb offset and spatial relation between CSI-RS). It would have been obvious to one of ordinary skill in the art before the time of effective filing to modify Li by providing one or more of the first frequency distribution, the second frequency distribution and the frequency distributions associated to the blocks correspond to combs, as shown by Xiao, thereby enabling semi-static configuration by higher layer parameter used for uplink timing estimation and downlink scheduling. Claims 11 and 21 are rejected under 35 U.S.C. 103 as being unpatentable over Li in view of Chatterjee et al. (US20210409173A1), hereafter Chatterjee. Regarding claims 11 and 21, Li does not expressly disclose one or more of the first frequency distribution, the second frequency distribution, and the frequency distributions are non-overlapping in frequency domain. Chatterjee discloses analogous art (Title: Collision Handling of Reference Signals) including one or more of the first frequency distribution, the second frequency distribution, and the frequency distributions are non-overlapping in frequency domain (paragraph 196; PRBs used by the CSI-RS are non-overlapping with PRBs of the SS block). It would have been obvious to one of ordinary skill in the art before the time of effective filing to modify Li by including one or more of the first frequency distribution, the second frequency distribution, and the frequency distributions are non-overlapping in frequency domain, as shown by Chatterjee, thereby supporting indication of the slot for CSI-RS transmission and the associated SS block. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to GREGORY B SEFCHECK whose telephone number is (571)272-3098. The examiner can normally be reached Monday-Friday 6AM-4PM. 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, Chirag Shah can be reached at 571-272-3144. 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. /GREGORY B SEFCHECK/Primary Examiner, Art Unit 2477
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Prosecution Timeline

Nov 06, 2023
Application Filed
Nov 03, 2025
Non-Final Rejection — §101, §102, §103 (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

1-2
Expected OA Rounds
69%
Grant Probability
89%
With Interview (+20.0%)
3y 8m
Median Time to Grant
Low
PTA Risk
Based on 677 resolved cases by this examiner. Grant probability derived from career allow rate.

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