Prosecution Insights
Last updated: July 17, 2026
Application No. 18/459,150

SUCCESSIVE CONDITIONAL HANDOVER

Non-Final OA §103
Filed
Aug 31, 2023
Priority
Aug 05, 2021 — continuation of PCTCN2021110914
Examiner
ACOLATSE, KODZOVI
Art Unit
2478
Tech Center
2400 — Computer Networks
Assignee
ZTE Corporation
OA Round
2 (Non-Final)
84%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allowance Rate
777 granted / 929 resolved
+25.6% vs TC avg
Strong +21% interview lift
Without
With
+21.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
51 currently pending
Career history
985
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
85.1%
+45.1% vs TC avg
§102
12.1%
-27.9% vs TC avg
§112
0.8%
-39.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 929 resolved cases

Office Action

§103
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 . Claims 1-4, 6-10, 12-15 and 17-19 are presented for examination. Response to Arguments Applicant’s arguments with respect to amendment of 1/22/2026 have been considered but are moot in view of new grounds of rejection. 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 1-4, 6-10, 12-15 and 17-19 are rejected under 35 U.S.C. 103 as being unpatentable over Fehrenbach et al (US 2022/0078684 A1) in view of Xu et al (US 2021/0051534 A1). Regarding claim 1, Fehrenbach teaches a method for wireless communication comprising: sending, by a source node to a target node, a conditional handover (CHO) request that includes candidate cell information (Fehrenbach: Fig. 2; step 240, [0101]; CHO request; Figs. 3 and 9, [0139], [0295]-[0297] the CHO including candidate target cells); receiving, by the source node from the target node, at least one candidate cell configuration in a CHO request response to the CHO request (Fehrenbach: Fig. 2; step 250, [0102] CHO ACK; Fig. 9, [0233]-[0234]); and sending, by the source node to a user equipment (UE), a radio resource control (RRC) message including at least one candidate cell configuration and one or more CHO execution conditions for each candidate cell to cause a CHO process from a source cell to a target candidate cell based on a candidate cell configuration among the at least one candidate cell configuration when the one or more CHO execution conditions for an associated candidate cell are met (Fehrenbach: Fig. 2: step 140, [0015], [103]-[0104] CHO configuration 140; Fig. 9). Fehrenbach does not explicitly disclose but Xu teaches wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration (Xu: Fig. 15:2524; [0097]-[0098], [0105] UE receives CHO configuration that need to be kept/maintained and performs handover based on the maintained CHO configurations). It would have been obvious to a person having an ordinary skill in the art before the effective filling date of the claimed invention to modify the system of Fehrenbach wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration as disclosed by Xu to provide a system for consecutive conditional handovers (Xu: Abstract). Regarding claim 7, Fehrenbach teaches a method for wireless communication comprising: receiving, by a target node from a source node, a conditional handover (CHO) request that includes candidate cell information (Fehrenbach: Fig. 2; step 240, [0101]; CHO request; Figs. 3 and 9, [0139], [0295]-[0297] the CHO including candidate target cells); sending, by the target node to the source node, at least one candidate cell configuration in a CHO request response to the CHO request (Fehrenbach: Fig. 2; step 250, [0102] CHO ACK; Fig. 9, [0233]-[0234]); and wherein the source node sends to a user equipment (UE), a radio resource control (RRC) message including at least one candidate cell configuration and one or more CHO execution conditions for each candidate cell to cause a CHO process from a source cell to a target candidate cell based on a candidate cell configuration among the at least one candidate cell configuration when the one or more CHO execution conditions for an associated candidate cell are met (Fehrenbach: Fig. 2: step 140, [0015], [103]-[0104] CHO configuration 140; Fig. 9). Fehrenbach does not explicitly disclose but Xu teaches wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration (Xu: Fig. 15:2524; [0097]-[0098], [0105] UE receives CHO configuration that need to be kept/maintained and performs handover based on the maintained CHO configurations). It would have been obvious to a person having an ordinary skill in the art before the effective filling date of the claimed invention to modify the system of Fehrenbach wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration as disclosed by Xu to provide a system for consecutive conditional handovers (Xu: Abstract). Regarding claim 14, Fehrenbach teaches a method for wireless communication comprising: receiving, by a user equipment (UE) from a source node, a radio resource control (RRC) message including at least one candidate cell configuration and one or more conditional handover (CHO) execution conditions for each candidate cell (Fehrenbach: Fig. 2: step 140, [0015], [103]-[0104] CHO configuration 140; Fig. 9); and performing, by the UE, a CHO process from a source cell to a target candidate cell based on the candidate cell configuration when the one or more CHO execution conditions for an associated candidate cell are met (Fehrenbach: Fig. 2: step 150 and 350, [103]-[0104] CHO configuration 140; Fig. 9, CHO completed). Fehrenbach does not explicitly disclose but Xu teaches wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration (Xu: Fig. 15:2524; [0097]-[0098], [0105] UE receives CHO configuration that need to be kept/maintained and performs handover based on the maintained CHO configurations). It would have been obvious to a person having an ordinary skill in the art before the effective filling date of the claimed invention to modify the system of Fehrenbach wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration as disclosed by Xu to provide a system for consecutive conditional handovers (Xu: Abstract). Regarding claim 18, Fehrenbach teaches a wireless communications apparatus comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement a method: receiving, by a user equipment (UE) from a source node, a radio resource control (RRC) message including at least one candidate cell configuration and one or more conditional handover (CHO) execution conditions for each candidate cell (Fehrenbach: Fig. 2: step 140, [0015], [103]-[0104] CHO configuration 140; Fig. 9); and performing, by the UE, a CHO process from a source cell to a target candidate cell based on a candidate cell configuration among the at least one candidate cell configuration when the one or more CHO execution conditions for an associated candidate cell are met (Fehrenbach: Fig. 2: step 150 and 350, [103]-[0104] CHO configuration 140; Fig. 9, CHO completed). Fehrenbach does not explicitly disclose but Xu teaches wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration (Xu: Fig. 15:2524; [0097]-[0098], [0105] UE receives CHO configuration that need to be kept/maintained and performs handover based on the maintained CHO configurations). It would have been obvious to a person having an ordinary skill in the art before the effective filling date of the claimed invention to modify the system of Fehrenbach wherein the RRC message comprises, for each candidate cell configuration, an indication indicating whether a corresponding candidate cell configuration is maintained after completion of the CHO process, wherein the UE maintains only the candidate cell configuration that is indicated as being maintained in the RRC message after completion of the conditional handover, and wherein the UE performs a subsequent conditional handover based on the maintained candidate cell configuration as disclosed by Xu to provide a system for consecutive conditional handovers (Xu: Abstract). Regarding claims 2 and 8, Fehrenbach teaches wherein the candidate cell information comprises at least one of a candidate cell identification information that is requested to prepare the CHO ((Fehrenbach: Figs. 2 and 9, [0296] cell identifiers of the candidate target cells), or a candidate cell identification information that has been configured as a CHO candidate. Regarding claims 3 and 9, Fehrenbach teaches wherein the CHO request comprises at least one of an indication to indicate a CHO from the target cell back to the source cell after execution of a CHO to one target cell is allowed, or an indication to indicate a CHO from the target cell to other target cells after execution of a CHO to one target cell is allowed (Fehrenbach: Figs. 2 and 9, [0166]). Regarding claims 4 and 10, Fehrenbach teaches wherein the candidate cell configuration of the at least one candidate cell configuration includes the execution condition for at least one of source primary cell (PCell), or the candidate cell that has been configured as a CHO candidate (Fehrenbach: Fig. 2: step 140 and Fig. 9, [0102]-[0104]). Regarding claims 6 and 12, Fehrenbach teaches receiving, by the source node from the target node, a CHO success message to inform a successful completion of the CHO process; and sending, by the source node to the target node, a candidate cell identification information configured by other target nodes (Fehrenbach: Fig. 2 and Fig. 9, [0103], [0125]). Regarding claims 13, 15, 17 and 19, Fehrenbach teaches receiving, by the target node from the UE, an RRC complete message that includes a candidate cell identification information whose candidate cell configuration is maintained at the UE after completion of the CHO process (Fehrenbach: Fig. 2: step 270; Fig. 9, [0235]-[0237]). Conclusion THIS ACTION IS MADE FINAL. 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 KODZOVI ACOLATSE whose telephone number is (571)270-1999. The examiner can normally be reached Monday to Friday 10 am to 6pm. 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, Avellino Joseph can be reached at (571) 272-3905. 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. /KODZOVI ACOLATSE/Primary Examiner, Art Unit 2478
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Prosecution Timeline

Aug 31, 2023
Application Filed
Oct 23, 2023
Response after Non-Final Action
Oct 28, 2025
Non-Final Rejection mailed — §103
Jan 22, 2026
Response Filed
Apr 17, 2026
Final Rejection mailed — §103
Jun 17, 2026
Response after Non-Final Action

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Prosecution Projections

2-3
Expected OA Rounds
84%
Grant Probability
99%
With Interview (+21.4%)
2y 6m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 929 resolved cases by this examiner. Grant probability derived from career allowance rate.

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