Prosecution Insights
Last updated: April 19, 2026
Application No. 18/693,740

METHOD AND APPARATUS FOR USING A CHO CONFIGURATION FOR RLF RECOVERY IN A WIRELESS COMMUNICATION SYSTEM

Non-Final OA §102§103§112
Filed
Mar 20, 2024
Examiner
KARIKARI, KWASI
Art Unit
2641
Tech Center
2600 — Communications
Assignee
LG Electronics Inc.
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
2y 7m
To Grant
87%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allow Rate
1021 granted / 1279 resolved
+17.8% vs TC avg
Moderate +7% lift
Without
With
+6.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
35 currently pending
Career history
1314
Total Applications
across all art units

Statute-Specific Performance

§101
4.8%
-35.2% vs TC avg
§103
60.8%
+20.8% vs TC avg
§102
19.9%
-20.1% vs TC avg
§112
10.9%
-29.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1279 resolved cases

Office Action

§102 §103 §112
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 Claim Status 1. This is in response to application filed on 3/20/2024 in which claims 1-19 and 30 are presented for examination. Priority 2. Receipt is acknowledged of papers submitted under 35 U.S.C. 119(a)-(d), which papers have been placed of record in the file. Information Disclosure Statement 3. The information disclosure statement (IDS) submitted 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 4.. 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 1 recites the limitation “the second time period” on line 9. There is no prior antecedence of the limitation in the claim. The claim is indefinite under 35 U.S.C. 112(b) All claims that depend on the above rejected claims are also rejected for fully incorporating the deficiencies of the above rejected claims from which they depend. For complete examination purposes, the Examiner will broadly address all of the above rejected claims in light of the overall concept of Applicant’s invention. Appropriate corrections are therefore required. Claim Rejections - 35 USC § 102 5. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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, 5-9, 11-14, 18-19 and 30 rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ulupinar et al. (US 2016/0323800), (hereinafter, Ulupinar). Regarding claim 1, Ulupinar discloses a method performed by a wireless device (= UT and a corresponding UE may be integral parts of a single physical device, such as a mobile telephone with an integral satellite transceiver, see [0058]) in a wireless communication system, the method comprising, receiving, from a network, a Conditional Handover (CHO) (= UT/mobile may need to be handed-off to another satellite; handoff may be caused by scheduled events or unscheduled event, see [0101-0106]), configuration including (1) information on candidate cells including a Non-Terrestrial Networks (NTN) cell (= ephemeris data includes a geographic description of where a given satellite is at a given point in time; and transition table indicates Cell ID of each cell, see [0132]), and (2) information on a first time period associated with the NTN cell (= SNP may transmit a signaling message containing satellite ephemeris data to all connected UTs, see [0131]; SNP or some other entity may generate a satellite and cell transition table that provides a list of satellites to which a UT may choose to handoff next; transition table also may indicate exactly at what time the UT will switch over from one cell to the next satellite to another, see [0132]; SNP may define the table based on information regarding whether certain cells/beams and/or satellite are turned off at certain times, see [0133 and 0156]), wherein the first time period starts at a first time point and terminates at a second time point (= UT is to tune to Satellite 1, Beam 1 from time a_1 to time b_1; and Satellite 2, Beam 1 from time a_2 to time b_2, see [0134]); performing a CHO evaluation for the candidate cells during the first time period (= UT 702 and the SNP 704 rely on the existing satellite and cell transition table to determine when to transition to the next cell/beam and/or satellite, see [0144]); stopping the CHO evaluation for the NTN cell at the second time point (= at some point in time a handoff is triggered 712, see [0146]; other handoff triggers may be due to the current serving satellite moving out of range of the UT 702, see [0147 and 0160]); performing cell selection, upon detecting radio link failure during the second time period, wherein the second time period starts at the second time point and terminates at a third time point (= cell/beam serving the UT 702 will be blacked-out due to GEO requirements, see [0147 and 0168]; if the signal strength is satisfactory, the UT 702 does nothing and waits for source NAC 706 to start the inter-satellite handoff process, see [0148]; source NAC 706 sends handoff signaling 720 (including new satellite and cell transition table) to the UT 702 that enables the UT 702 to communicate with the target NAC 716, see [0150]; and Handoff Activation Time and Handoff Activation Time plus a tune-away time, see [0141-0142]); and performing a CHO to the NTN cell, based on that the NTN cell is selected by the cell selection (= UT 702 detaches 722 from the first satellite and synchronizes to the second satellite, see [0151]). Regarding claim 5, as mentioned in claim 1, Ulupinar discloses the method, wherein the method further comprises, performing cell selection, upon detecting radio link failure after the third time point; and performing re-establishment procedure to the NTN cell (see, [0168-69]). Regarding claim 6, as mentioned in claim 1, Ulupinar discloses the method, wherein the method further comprises, performing re-establishment procedure to the NTN cell, based on that the NTN cell is not selected by the cell selection (see, [0168-69]). Regarding claim 7, as mentioned in claim 1, Ulupinar discloses the method, wherein the CHO configuration includes a CHO triggering condition for each of the candidate cells (see, [0154 and 0156]). Regarding claim 8, as mentioned in claim 7, Ulupinar discloses the method, wherein the CHO triggering condition for the NTN cell is satisfied based on that (1) measured cell quality of the NTN cell is equal to or greater than a threshold and (2) a current time point is within the first time period (see, [0154 and 0156]). Regarding claim 9, as mentioned in claim 7, Ulupinar discloses the method, wherein the method further comprises, stopping to evaluate whether the CHO triggering condition for the NTN cell is satisfied, after the second time point (see, [0168]). Regarding claim 11, as mentioned in claim 1, Ulupinar discloses the method wherein the CHO evaluation is performed based on measurements on the candidate cells (see, [0154, 0156 and 0159]). Regarding claim 12, as mentioned in claim 1, Ulupinar discloses the method wherein the cell selection is performed based on the CHO evaluation performed during the first time period (see, [0154 and 0156]). Regarding claim 13, as mentioned in claim 1, Ulupinar discloses the method, wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device (see, [0154 and 0156]). Regarding claim 14, Ulupinar disclose a wireless device (= UT and a corresponding UE may be integral parts of a single physical device, such as a mobile telephone with an integral satellite transceiver, see [0058]) in a wireless communication system comprising: a transceiver (= antenna 504); a memory (= memory 516); and at least one processor (= processor 512, see Fig. 5) operatively coupled to the transceiver and the memory, and configured to: control the transceiver to receive, from a network, a Conditional Handover (CHO) (= UT/mobile may need to be handed-off ton another satellite; handoff may be caused by scheduled events or unscheduled event, see [0101-0106]) configuration including (1) information on candidate cells including a Non-Terrestrial Networks (NTN) cell (= ephemeris data includes a geographic description of where a given satellite is at a given point in time; and transition table indicates Cell ID of each cell, see [0132]), and (2) information on a first time period associated with the NTN cell (= SNP may transmit a signaling message containing satellite ephemeris data to all connected UTs, see [0131]; SNP or some other entity may generate a satellite and cell transition table that provides a list of satellites to which a UT may choose to handoff next; transition table also may indicate exactly at what time the UT will switch over from one cell to the next satellite to another, see [0132]; SNP may define the table based on information regarding whether certain cells/beams and/or satellite are turned off at certain times, see [0133 and 0156]), wherein the first time period starts at a first time point and terminates at a second time point (= UT is to tune to Satellite 1, Beam 1 from time a_1 to time b_1; and Satellite 2, Beam 1 from time a_2 to time b_2, see [0134]); perform a CHO evaluation for the candidate cells during the first time period(= UT 702 and the SNP 704 rely on the existing satellite and cell transition table to determine when to transition to the next cell/beam and/or satellite, see [0144]); stop the CHO evaluation for the NTN cell at the second time point (= at some point in time a handoff is triggered 712, see [0146]; other handoff triggers may be due to the current serving satellite moving out of range of the UT 702, see [0147 and 0160]); perform cell selection, upon detecting radio link failure during the second time period, wherein the second time period starts at the second time point and terminates at a third time point (= cell/beam serving the UT 702 will be blacked-out due to GEO requirements, see [0147 and 0168]; if the signal strength is satisfactory, the UT 702 does nothing and waits for source NAC 706 to start the inter-satellite handoff process, see [0148]; source NAC 706 sends handoff signaling 720 (including new satellite and cell transition table) to the UT 702 that enables the UT 702 to communicate with the target NAC 716, see [0150]; and Handoff Activation Time and Handoff Activation Time plus a tune-away time, see [0141-0142]); and perform a CHO to the NTN cell, based on that the NTN cell is selected by the cell selection (= UT 702 detaches 722 from the first satellite and synchronizes to the second satellite, see [0151]). Regarding claim 18, as mentioned in claim 14, Ulupinar discloses the wireless device wherein the at least one processor is further configured to, perform cell selection, upon detecting radio link failure after the third time point; and perform re-establishment procedure to the NTN cell (see, [0168-69]). Regarding claim 19, as mentioned in claim 14, Ulupinar discloses the wireless device wherein the at least one processor is further configured to, perform re-establishment procedure to the NTN cell, based on that the NTN cell is not selected by the cell selection (see, [0168-69]). Regarding claim 30, Ulupinar discloses a base station (= ground station/SNP 250, see [0060 and 0345]) in a wireless communication system comprising: a transceiver (= antennas 205); a memory (= memory device 234, see [0079]); and a processor (= processor 228) operatively coupled to the transceiver and the memory, and configured to: control the transceiver to transmit, to a wireless device, a Conditional Handover (CHO) configuration including (1) information on candidate cells including a Non-Terrestrial Networks (NTN) cell (= SNP may generate a satellite and cell transition table, see [0132]; and sent the table to the UT it is serving, see [0135]) (2) information on a first time period as a CHO triggering condition to the NTN cell (= SNP may transmit a signaling message containing satellite ephemeris data to all connected UTs, see [0131]; SNP or some other entity may generate a satellite and cell transition table that provides a list of satellites to which a UT may choose to handoff next; transition table also may indicate exactly at what time the UT will switch over from one cell to the next satellite to another, see [0132]; SNP may define the table based on information regarding whether certain cells/beams and/or satellite are turned off at certain times, see [0133 and 0156]), and (3) information on a second time period for performing a CHO to the NTN cell as a radio link failure recovery (= NAC 806 sends handoff signaling 826 to the UT 802; handoff signaling may include a new satellite and cell transition table, see [0162]; and if the UT loses the current serving cell/beam before the expiration of the specific time in the satellite and cell transition table, the UT enters into radio link failure mode, see [0168]), wherein the first time period starts at a first time point and terminates at a second time point (= UT is to tune to Satellite 1, Beam 1 from time a_1 to time b_1; and Satellite 2, Beam 1 from time a_2 to time b_2, see [0134]) and the second time period starts at the second time point and terminates a third time point (= UT is to tune to Satellite 1, Beam 1 from time a_1 to time b_1; and Satellite 2, Beam 1 from time a_2 to time b_2, see [0134-135]). Claim Rejections - 35 USC § 103 6. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. 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 2-4, 10 and 15-17 are rejected under 35 U.S.C. 103(a) as being unpatentable over Ulupinar in view of Xu et al., (US 2021/0051534), (hereinafter, Xu). Regarding claim 2, as mentioned in claim 1, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the method, wherein method further comprises, keeping the information on the cell after the second time point, without discarding the information on the cell from the CHO configuration. However, Xu, which is an analogous art, equivalently disclose the method, wherein method further comprises, keeping the information on the cell after the second time point, without discarding the information on the cell from the CHO configuration (= wireless device 506 may retain the conditional handover information received from the first cellular base station 502, see [0082]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 3, as mentioned in claim 2, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the method, wherein the method further comprises, discarding the information on the cell from the CHO configuration, at the third time point. However, Xu, which is an analogous art, equivalently disclose the method, wherein the method further comprises, discarding the information on the cell from the CHO configuration, at the third time point (= discarding/cancelling conditional handover information, see [0084]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 4, as mentioned in claim 3, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the method, wherein the discarding the information on the cell from the CHO configuration comprises, discarding a cell identifier (ID) for the cell and a corresponding configuration for the cell. However, Xu, which is an analogous art, equivalently disclose the method, wherein the discarding the information on the cell from the CHO configuration comprises, discarding a cell identifier (ID) for the cell and a corresponding configuration for the cell (= discarding/cancelling conditional handover information, see [0084]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 10, as mentioned in claim 7, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the method, wherein the method further comprises, discarding the CHO triggering condition for the cell at the second time point. However, Xu, which is an analogous art, equivalently disclose the method, wherein the method further comprises, discarding the CHO triggering condition for the cell at the second time point (= discarding/cancelling conditional handover information, see [0084]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 15, as mentioned in claim 14, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the wireless device, wherein the at least one processor is further configured to, keep the information on the cell after the second time point, without discarding the information on the cell from the CHO configuration. However, Xu, which is an analogous art, equivalently disclose the wireless device, wherein the at least one processor is further configured to, keep the information on the cell after the second time point, without discarding the information on the cell from the CHO configuration (= wireless device 506 may retain the conditional handover information received from the first cellular base station 502, see [0082]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 16, as mentioned in claim 15, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the wireless device, wherein the at least one processor is further configured to, discard the information on the cell from the CHO configuration, at the third time point. However, Xu, which is an analogous art, equivalently disclose the wireless device, wherein the at least one processor is further configured to, discard the information on the cell from the CHO configuration, at the third time point (= discarding/cancelling conditional handover information, see [0084]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. Regarding claim 17, as mentioned in claim 16, Ulupinar discloses the NTN cell (see, see [0056]); but explicitly fails to disclose the wireless device, wherein the discarding the information on the cell from the CHO configuration comprises, discarding a cell identifier (ID) for the cell and a corresponding configuration for the cell. However, Xu, which is an analogous art, equivalently disclose the wireless device, wherein the discarding the information on the cell from the CHO configuration comprises, discarding a cell identifier (ID) for the cell and a corresponding configuration for the cell (= discarding/cancelling conditional handover information, see [0084]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have combined the teaching of Xu with Ulupinar for the benefit of achieving a conditional handoff communication system where handover condition information received by the mobile device could be retained and reuse if similar handoff conditions are met. CONCLUSION 7. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. a. Roy et al., (US 2020/0314914) teaches broadcast and group-based handover in NR-based LEO-NTN. b. Mangalvedhe et al., (US 2020/0107237) teaches method and apparatus for deploying a moving base station for internet of things application. c. Dou et al., (US 2021/0235416) teaches tracking area update and paging method for non-terrestrial satellite networks. 7. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KWASI KARIKARI whose telephone number is (571)272-8566. The examiner can normally be reached M-Sat: 6am-10pm. 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, Charles Appiah can be reached on 571-272-7904. 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. /Kwasi Karikari/ Primary Examiner: Art Unit 2641.
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Prosecution Timeline

Mar 20, 2024
Application Filed
Feb 10, 2026
Non-Final Rejection — §102, §103, §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

1-2
Expected OA Rounds
80%
Grant Probability
87%
With Interview (+6.8%)
2y 7m
Median Time to Grant
Low
PTA Risk
Based on 1279 resolved cases by this examiner. Grant probability derived from career allow rate.

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