Prosecution Insights
Last updated: April 19, 2026
Application No. 18/003,890

RADIO LINK FAILURE IN SIDELINK RELAY

Final Rejection §102§103
Filed
Dec 29, 2022
Examiner
LIN, KENNY S
Art Unit
2416
Tech Center
2400 — Computer Networks
Assignee
Qualcomm Incorporated
OA Round
4 (Final)
69%
Grant Probability
Favorable
5-6
OA Rounds
2y 11m
To Grant
81%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allow Rate
587 granted / 847 resolved
+11.3% vs TC avg
Moderate +12% lift
Without
With
+11.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
23 currently pending
Career history
870
Total Applications
across all art units

Statute-Specific Performance

§101
6.1%
-33.9% vs TC avg
§103
41.8%
+1.8% vs TC avg
§102
27.8%
-12.2% vs TC avg
§112
13.0%
-27.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 847 resolved cases

Office Action

§102 §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 Claims 1, 3-23, 25-30 are presented for examination. Response to Arguments Applicant's arguments filed on 1/2/2026 regarding claims 1, 3-23, and 25-30 have been fully considered but they are not persuasive. In the remark, applicant argued (1) Xu does not disclose “receiving, via a first link between a relay UE and the network entity, a report indicating a RLF on a second link between the relay UE and a remote UE. (2) Xu does not teach that the report indicates “at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements”. (3) Xu does not disclose “taking one or more actions, in response to the report, to trigger relay reselection by the remote UE.” (4) Xu and Jung do not teach “detecting a RLF on at least one of a first link between the relay UE and a serving network entity or a second link between the relay UE and a remote UE”. (5) Xu and Jung do not teach “taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE”. (6) Xu and Jung do not teach where “if the second link is available, the one or more actions comprises at least one of sending a link release message to the remote UE or sending an indication by an upper layer”. Examiner traverse the argument: As to point (1), this argument was previously addressed in the 4/17/2025 Final action. Xu clearly teaches in paragraph 0004 to detect the quality of the link becoming poor and the link is of a link between the relay UE and the remote UE (PC5 link) or a link between the relay UE and the base station (Uu link) (The relay reselection may be triggered in the following two cases. In a first case a quality of a PC5 link between the remote UE and the relay UE becomes poor. In a second case, a quality of a Uu link between the relay UE and the base station becomes poor…). Xu further defines in paragraph 0108 that poor quality of the link includes RLF (During an operation of the counter T310, no in-syn event, occurs, the UE will announce that a radio failure (RLF) occurs, and reports the event to the base station). Xu’s teaching of monitoring link quality between PC5 and Uu link and defining RLF as a condition of poor link quality to results in triggering relay reselection meet the claimed limitation. Therefore, the argument is not found persuasive. As to point (2), Xu discloses the report to indicates a sidelink reference signal received power (SL-RSRP) measurements (pp. 0046: RSRPUu is a Sidelink RSRP), and an RLF cause of the RSRP less than a threshold indicating that the quality of the Uu link is poor (pp. 0049, 0054-0055). These clearly reads on the claimed limitation of “the report indicates at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements”. Therefore, the argument is not found persuasive. As to point (3), this argument was previously addressed in the 4/17/2025 Final action. Xu in multiple paragraphs discloses to take one or more actions, in response to the detection, to trigger relay reselection by the remote UE. For example, Xu in paragraph 0036 discloses “During the process, in order to ensure continuity of respective services, the source relay UE is to perform a handover process, that is, switching to a cell covered by the eNB2, and the remote UE is to perform a relay reselection process, that is reselecting a target relay UE in a coverage of other eNB” regarding the relay UE performing the action of handover. Xu in paragraph 0037 discloses another action where the source relay UE perform a relay selection process as it moves away from the eNB and becomes the remote UE, which performs a relay reselection process (…the source relay UE is to function as the remote UE. During the process, in order to ensure continuity of respective services, the remote UE is to perform a relay reselection process, that is, reselection a target relay UE in a coverage of an eNB to assist the remote UE to communicate with the eNB. The source relay UE is to perform a relay selection process, that is, selecting a relay UE in a coverage of an eNB to assist the source relay UE to communicate with the eNB). Paragraph 0108 of Xu further discloses to perform the action of RRC reestablishment when the UE needs to perform handover. Paragraph 0086 further teaches multiple actions to be performed that leads to triggering of the relay reselection (if it needs to trigger the relay reselection process, the source relay UE notifies the remote UE of relay reselection trigger information and scenario information…). Therefore, Xu teaches the claimed step of taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE. For these reasons, the argument is not found persuasive. As to point (4), this identical argument is addressed above. See point (1). As to point (5), this identical argument is addressed above. See point (3). As to point (6), Xu specifically teaches to take one or more actions in response to the detection of a RLF (see point (1) above). Jung discloses in paragraph 0009 of the case where a quality of service provided by the relay UE becomes worse, it may be necessary to release the connection. Xu defines in paragraph 0108 that poor quality of the link includes RLF (During an operation of the counter T310, no in-syn event, occurs, the UE will announce that a radio failure (RLF) occurs, and reports the event to the base station). Similar to Xu, Jung in paragraph 0140 defines deterioration of the quality of the radio link as a RLF when communication is almost impossible because of the low quality. Jung in paragraph 0260-0267 discloses to reselect relay UE when the currently connected relay UE does not satisfy the minimum condition of sidelink measurement value exceeding a specific threshold (e.g. above a certain quality). Paragraph 0009 of Jung is further explained in paragraphs 0289-0294 to select a new relay UE due to deterioration in a quality of relay service provided by the current relay UE, the currently relay UE is excluded from the candidate relay UE according to a relay link release command for relay reselection. Therefore, the combination of Xu and Jung discloses the claimed limitation of “taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE” and “if the second link is available, the one or more actions comprises at least one of sending a link release message to the remote UE or sending an indication by an upper layer”. 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. 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 20 and 29-30 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Xu et al (Xu), US2018/0343598 As per claim 20, Xu teaches the invention including a method for wireless communications by a network entity, comprising: Receiving, via a first link between a relay user equipment (UE) and the network entity, a report indicating a radio link failure (RLF) on a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the report indicates at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements (pp. 0046, 0049, 0054-0055, 0108: RSRPUu is a Sidelink RSRP); and Taking one or more actions, in response to the report, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0086, 0108). As per claim 29, Xu teaches the invention including an apparatus for wireless communications by a network entity (pp. 0180), comprising: memory comprising instructions (pp. 0182, 0189); and One or more processors configured, individually or collectively, to execute the instructions and cause the apparatus to (pp. 0183): Receive, via a first link between a relay user equipment (UE) and the network entity, a report indicating a radio link failure (RLF) on a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the report indicates at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements (pp. 0046, 0049, 0054-0055, 0108: RSRPUu is a Sidelink RSRP); and Take one or more actions, in response to the report, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0108). As per claim 30, Xu teaches the invention including an apparatus for wireless communications by a network entity, comprising: Means for receiving, via a first link between a relay user equipment (UE) and the network entity, a report indicating a radio link failure (RLF) on a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the report indicates at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements (pp. 0046, 0049, 0054-0055, 0108: RSRPUu is a Sidelink RSRP); and Means for taking one or more actions, in response to the report, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0086, 0108). 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. Claim(s) 21-23 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu et al (Xu), US2018/0343598, in view of Kim et al (Kim), US 2020/0178343. As per claim 21, Xu teaches the invention as claimed in claim 20. Xu does not teach wherein the one or more actions involves a radio resource control (RRC) state management procedure for the Remote UE. Kim teaches the one or more actions involves a radio resource control state management procedure for the Remote UE (pp. 0160, 0203, 0316, 0390-0418, 0835-0841). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Kim in order to manage connection states and reestablish the failed link. As per claim 22, Xu and Kim teach the invention as claimed in claim 21. Kim further teaches wherein the RRC state management procedure involves at least one of removing remote UE context or sending the remote UE to an idle state (pp. 0390-0418). As per claim 23, Xu teaches the invention as claimed in claim 20. Xu does not teach to further comprise, if the relay UE is in an idle or inactive state, receiving a request from the relay UE to enter a connected state before receiving the report. Kim teaches to switch from idle state to connect state for receiving information (pp. 0203, 0316, 0835-0841). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Kim in order to attempt connection reestablishment and transmit previous link failure report to notify of earlier connection issues. Claim(s) 1, 3, 5-7, 10, 12, 14, 25-28 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu et al (Xu), US2018/0343598, in view of Jung et al (Jung), US 2018/0152986. As per claim 1, Xu teaches the invention including a method for wireless communications by a relay user equipment (UE), comprising: Detecting a radio link failure (RLF) on at least one of a first link between the relay UE and a serving network entity or a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the RLF comprises an RLF on at least the first link (pp. 0004-0005, 0008, 0036-0037, 0108; quality of a Uu link between the relay UE and the base station becomes poor); and Taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0086, 0108). Xu further teaches that the second link is available (pp. 0004-0005; PC5 link in good quality). Xu does not teach wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer. Jung teaches wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer (pp. 0009, 0260-0267, 0289-0294, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). As per claim 3, Xu and Jung teach the invention as claimed in claim 1. Xu further teaches wherein, if the second link is available (pp. 0004), the one or more actions further comprises: Performing a procedure to reestablish a link with the serving network entity (pp. 0108). As per claim 5, Xu and Jung teach the invention as claimed in claim 1. Xu further teaches wherein the RLF further comprises an RLF on at least the second link (pp. 0004-0005, 0008, 0036-0037, 0108). As per claim 6, Xu and Jung teach the invention as claimed in claim 5. Xu further teaches wherein, if the first link is available, the one or more actions comprise: Sending a report indicating the RLF to the serving network entity (pp. 0047, 0059, 0086, 0108). As per claim 7, Xu and Jung teach the invention as claimed in claim 6. Xu further teaches wherein the report indicates at least one of an RLF cause, a remote UE ID, or sidelink reference signal received power (SL-RSRP) measurements (pp. 0046, 0049, 0053-0054, 0108). As per claim 10, Xu teaches the invention including a method for wireless communications by a remote user equipment (UE), comprising: Detecting a trigger event indicative of a radio link failure (RLF) on at least one of a first link between a relay UE and a serving network entity or a second link between the remote UE and the relay UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the trigger event comprises at least one of receipt, from the relay UE, a sidelink reference signal received power (SL-RSRP) measurement being below a threshold (pp. 0049, 0053-0054); and Performing relay reselection, in response to the detection, based on link quality measurements on one or more links between the remote UE and one or more relay UEs and one or more criteria (pp. 0004-0005, 0008, 0036-0037, 0043-0044, 0056, 0086, 0108). Xu does not teach wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer. Jung teaches wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer (pp. 0009, 0260-0267, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). As per claim 12, Xu and Jung teach the invention as claimed in claim 10. Xu further teaches to comprise: Performing cell selection if the relay reselection fails (pp. 0036, 0053-0054, 0061-0064). As per claim 14, Xu and Jung teach the invention as claimed in claim 10. Xu further teaches wherein the one or more criteria involve an access stratum (AS) layer of the remote UE (pp. 0108, 0144: RRC reestablishment is of AS layer). As per claim 25, Xu teaches the invention including an apparatus for wireless communications by a relay user equipment (UE) (pp. 0179), comprising: memory comprising instructions (pp. 0196-0197); and One or more processors configured, individually or collectively, to execute the instructions and cause the apparatus to (pp. 0196-0197): Detect a radio link failure (RLF) on at least one of a first link between the relay UE and a serving network entity or a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the RLF comprises an RLF on at least the first link (pp. 0004-0005, 0008, 0036-0037); and Take one or more actions, in response to the detection, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0108). Xu further teaches that the second link is available (pp. 0004-0005; PC5 link in good quality). Xu does not teach wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer. Jung teaches wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer (pp. 0009, 0260-0267, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). As per claim 26, Xu teaches the invention including an apparatus for wireless communications by a relay user equipment (UE), comprising: Means for detecting a radio link failure (RLF) on at least one of a first link between the relay UE and a serving network entity or a second link between the relay UE and a remote UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the RLF comprises an RLF on at least the first link; and Means for taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE (pp. 0004-0005, 0008, 0036-0037, 0086, 0108). Xu further teaches that the second link is available (pp. 0004-0005; PC5 link in good quality). Xu does not teach wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer to the remote UE. Jung teaches wherein, if the second link is available, the one or more actions comprise at least one of sending a link release message to the remote UE or sending an indication by an upper layer to the remote UE (pp. 0009, 0260-0267, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). As per claim 27, Xu teaches the invention including an apparatus for wireless communications by a remote user equipment (UE) (pp. 0179), comprising: memory comprising instructions (pp. 0196-0197); and One or more processors configured, individually or collectively, to execute the instructions and cause the apparatus to (pp. 0196-0197): Detect a trigger event indicative of a radio link failure (RLF) on at least one of a first link between a relay UE and a serving network entity or a second link between the remote UE and the relay UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the trigger event comprises at least one of receipt, from the relay UE, a sidelink reference signal received power (SL-RSRP) measurement being below a threshold (pp. 0049, 0053-0054); and Perform relay reselection, in response to the detection, based on link quality measurements on one or more links between the remote UE and one or more relay UEs and one or more criteria (pp. 0004-0005, 0008, 0036-0037, 0043-0044, 0056, 0108). Xu does not teach wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer. Jung teaches wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer (pp. 0009, 0260-0267, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). As per claim 28, Xu teaches the invention including an apparatus for wireless communications by a remote user equipment (UE), comprising: Means for detecting a trigger event indicative of a radio link failure (RLF) on at least one of a first link between a relay UE and a serving network entity or a second link between the remote UE and the relay UE (pp. 0004-0005, 0008, 0036-0037, 0108), wherein the trigger event comprises at least one of receipt, from the relay UE, a sidelink reference signal received power (SL-RSRP) measurement being below a threshold (pp. 0049, 0053-0054); and Means for performing relay reselection, in response to the detection, based on link quality measurements on one or more links between the remote UE and one or more relay UEs and one or more criteria (pp. 0004-0005, 0008, 0036-0037, 0043-0044, 0056, 0086, 0108). Xu does not teach wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer. Jung teaches wherein the trigger event comprises at least one of receipt, from the relay UE, of a link release message for the remote UE, receipt of an indication by an upper layer (pp. 0009, 0260-0267, 0296-0304). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu and Jung and release an established connection in case the quality of the service provided by the relay UE becomes worse and a relay UE reselection is needed (pp. 0260-0267). Claim(s) 8 and 15-19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu and Jung as applied to claims 1, 3, 5-7, 10, 12, 14, 25-28 above, and further in view of Kim et al (Kim), US 2020/0178343. As per claim 8, Xu and Jung teach the invention as claimed in claim 6. Xu and Jung do not teach wherein the one or more actions further comprise, if the relay UE is in an idle or inactive state, requesting to enter a connected state before sending the report. Kim teaches to switch from idle state to connect state for receiving information (pp. 0203, 0316, 0835-0841). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teachings of Xu, Jung and Kim in order to attempt connection reestablishment and transmit previous link failure report to notify of earlier connection issues. As per claim 15, Xu and Jung teach the invention as claimed in claim 14. Xu and Jung do not teach wherein the one or more criteria are based on: Relay discovery message contents to indicate relay UE candidates to the AS layer; and Selection of one or more of the relay UE candidates by the AS layer. Kim teaches wherein the one or more criteria are based on: Relay discovery message contents to indicate relay UE candidates to the AS layer (0102, 0290, 0507-0522, 0655-0656); and Selection of one or more of the relay UE candidates by the AS layer (0102, 0290, 0507-0522, 0655-0656). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teaching of Xu, Jung and Kim and further perform relay reselection based on the conditions of the discovered relay UE having specific service code parameter and other configurations to rank and select the best candidate relay UE. As per claim 16, Xu, Jung and Kim teach the invention as claimed in claim 15. Kim further teaches wherein the relay UE candidates satisfy link quality criteria (pp. 0507-0522, 0667, 0658-0686). As per claim 17, Xu and Jung teach the invention as claimed in claim 14. Xu and Jung do not teach wherein the one or more criteria are based on: An ordered list of relay UE candidates provided to the AS layer; and Selection of one or more of the relay UE candidates by the AS layer based on content of relay discovery message. Kim teaches wherein the one or more criteria are based on: An ordered list of relay UE candidates provided to the AS layer (0102, 0290, 0507-0522, 0655-0656; ranking of candidates); and Selection of one or more of the relay UE candidates by the AS layer based on content of relay discovery message (0102, 0290, 0507-0522, 0655-0656). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teaching of Xu, Jung and Kim and further perform relay reselection based on the conditions of the discovered relay UE having specific service code parameter and other configurations to rank and select the best candidate relay UE. As per claim 18, Xu, Jung and Kim teach the invention as claimed in claim 17. Kim further teaches wherein the relay UE candidates satisfy link quality criteria (pp. 0507-0522, 0667, 0658-0686). As per claim 19, Xu and Jung teach the invention as claimed in claim 14. Xu and Jung do not teach wherein the one or more criteria are based on at least one of QoS of relay discovery messages or content of relay discovery messages. Kim further teaches wherein the one or more criteria are based on at least one of QoS of relay discovery messages or content of relay discovery messages (pp. 0507-0522, 0667, 0658-0686). It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teaching of Xu, Jung and Kim and further perform relay reselection based on the conditions of the discovered relay UE having specific service code parameter and other configurations to rank and select the best candidate relay UE. Claim(s) 4, 9 and 13 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu and Jung as applied to claims 1, 3, 5-7, 10, 12, 14, 25-28 above, and further in view of obviousness. As per claim 4, Xu and Jung teach the invention as claimed in claim 1. Xu and Jung do not teach wherein, if the second link is unavailable, the one or more actions comprise: Ceasing sending relay messages. However, ceasing to send data over unavailable link is obvious and common practice in the art to prevent resource congestion and data buffering. It would have been obvious to one of ordinary skill in the art at the time the invention was made to combine the teaching of Xu, Jung and in response to a link failure, stop all data transmission on the failure link to prevent data buffering for sending and/or data lost in transmissions. As per claim 9, Xu and Jung teach the invention as claimed in claim 5. Xu and Jung do not teach wherein, if the first link is unavailable, the one or more actions comprise: Ceasing sending relay discovery messages. However, ceasing to send data over unavailable link is obvious and common practice in the art to prevent resource congestion and data buffering. It would have been obvious to one of ordinary skill in the art at the time the invention was made to combine the teaching of Xu, Jung and in response to a link failure, stop all data transmission on the failure link to prevent data buffering for sending and/or data lost in transmissions. As per claim 13, Xu and Jung teach the invention as claimed in claim 12. Xu and Jung do not further teach comprising: Declaring an out of coverage state if the cell selection fails. However, providing a notification of out of coverage state is obvious when there is no cell selection possible to provide any service in the area. It would have been obvious to one of ordinary skill in the art at the time the invention was filed to combine the teaching of Xu, Jung and further implement the UE to provide an indication of when there is no cell service coverage at the current location. Claim(s) 11 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu and Jung as applied to claims 1, 3, 5-7, 10, 12, 14, 25-28 above, and further in view of Xu et al (Xu606), US 2021/0144606. As per claim 11, Xu and Jung teach the invention as claimed in claim 10. Xu and Jung do not teach wherein the trigger event further comprises: Absent of relay discovery message from the relay UE. Xu606 teaches to utilize absent of relay discovery message from the relay UE as a trigger criterion (pp. 0139, 0179). It would have been obvious to one of ordinary skill in the art at the time the invention was made to combine the teachings of Xu, Jung and Xu606 to determine RLF with the relay UE and trigger relay reselection when relay discovery message is no longer being received from the relay UE. 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 KENNY S LIN whose telephone number is (571) 272-3968. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Noel Beharry can be reached on 571-270-5630. The fax phone number for the organization where this application or proceeding is assigned is (571) 273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). KENNY S. LIN Examiner Art Unit 2416 /Kenny S Lin/ Primary Examiner, Art Unit 2416 February 2, 2026
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Prosecution Timeline

Dec 29, 2022
Application Filed
Dec 23, 2024
Non-Final Rejection — §102, §103
Mar 26, 2025
Response Filed
Apr 14, 2025
Final Rejection — §102, §103
Jun 09, 2025
Response after Non-Final Action
Jul 16, 2025
Request for Continued Examination
Jul 18, 2025
Response after Non-Final Action
Sep 29, 2025
Non-Final Rejection — §102, §103
Nov 11, 2025
Interview Requested
Nov 25, 2025
Applicant Interview (Telephonic)
Nov 25, 2025
Examiner Interview Summary
Jan 02, 2026
Response Filed
Feb 02, 2026
Final Rejection — §102, §103
Apr 02, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12598485
COMMUNICATION METHOD AND APPARATUS FOR PLURALITY OF ADMINISTRATIVE DOMAINS
2y 5m to grant Granted Apr 07, 2026
Patent 12593371
NETWORK NODE APPARATUS AND METHODS FOR ACHIEVING END-TO-END RELIABILITY AND IMPROVING FAULT TOLERANCE IN WIRELESS SYSTEMS
2y 5m to grant Granted Mar 31, 2026
Patent 12587221
Device for improving reception and method for improving reception
2y 5m to grant Granted Mar 24, 2026
Patent 12587938
CELL HANDOVER METHOD AND APPARATUS, AND STORAGE MEDIUM
2y 5m to grant Granted Mar 24, 2026
Patent 12588053
TRANSMISSION METHOD AND APPARATUS, PRIORITY DEFINITION METHOD AND APPARATUS, AND COMMUNICATION DEVICE
2y 5m to grant Granted Mar 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
69%
Grant Probability
81%
With Interview (+11.6%)
2y 11m
Median Time to Grant
High
PTA Risk
Based on 847 resolved cases by this examiner. Grant probability derived from career allow rate.

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