# US 12,604,270 B2 · Method to fast recover UE from PS call failure in 5G NSA > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,270 B2 - Document ID: US12604270B2 - Status: Granted - Kind: B2 - Application number: 17/760,307 - Filed: 2020-04-07 - Published: 2023-03-09 - Granted: 2026-04-14 - Earliest claimed: 2020-04-07 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Fojian Zhang; Jian Li; Chaofeng Hui; Quanling Zhang; Hao Zhang - Web page: https://patentgrep.com/patent/US12604270B2 ## CPC - H04W 52/0235: {where the received signal is a power saving command} - H04W 36/00698: {using different RATs} - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Embodiments include systems and methods for enabling fast recovery by a user equipment (UE) from packet switched (PS) call failure in a fifth generation (5G) non-standalone (NSA) network. Various embodiments for recovering from PS call failure in a 5G NSA network may include determining whether a total number of Evolved Packet System (EPS) bearer deactivation requests received from a base station of a 5G NSA network during a time period exceeds a maximum counter value, and disabling 5G data calls on the UE in response to determining that the total number of EPS bearer deactivation requests received from the base station of the 5G NSA network during the time period exceeds the maximum counter value. ## Claims ### Claim 1 A method for recovering from packet switched (PS) call failure in a fifth generation (5G) non-standalone (NSA) network, comprising: determining, by a processor of a user equipment (UE), whether a total number of Evolved Packet System (EPS) bearer deactivation requests received from a base station of a 5G NSA network during a time period exceeds a maximum counter value; and disabling, by the processor, 5G data calls on the UE in response to determining that the total number of EPS bearer deactivation requests received from the base station of the 5G NSA network during the time period exceeds the maximum counter value. ### Claim 2 (depends on 1) The method of claim 1, further comprising: falling back, by the processor, to fourth generation (4G) mode for data calls in response to disabling 5G data calls on the UE. ### Claim 3 (depends on 1) The method of claim 1, further comprising: starting, by the processor, a back-off timer in response to disabling 5G data calls on the UE; determining, by the processor, whether the back-off timer has expired; and enabling, by the processor, 5G data calls on the UE in response to determining that the back-off timer has expired. ### Claim 4 (depends on 3) The method of claim 3, wherein the back-off timer expires one hour after starting. ### Claim 5 (depends on 3) The method of claim 3, further comprising: sending, by the processor, a first tracking area update request to the base station of the 5G NSA network prior to receiving any EPS bearer deactivation requests from the base station of the 5G NSA network, the first tracking area update request indicating dual connectivity with new radio (DCNR) is supported by the UE; and sending, by the processor, a second tracking area update request to the base station of the 5G NSA network in response to disabling 5G data calls on the UE, the second tracking area update request indicating DCNR is not supported. ### Claim 6 (depends on 1) The method of claim 1, wherein the time period is sixty seconds and the maximum counter value is five. ### Claim 7 A user equipment (UE), comprising: a processor configured to: determine whether a total number of Evolved Packet System (EPS) bearer deactivation requests received from a base station of a fifth generation (5G) non-standalone (NSA) network during a time period exceeds a maximum counter value; and disable 5G data calls on the UE in response to determining that the total number of EPS bearer deactivation requests received from the base station of the 5G NSA network during the time period exceeds the maximum counter value. ### Claim 8 (depends on 7) The UE of claim 7, wherein the processor is further configured to: fallback to fourth generation (4G) for data calls in response to disabling 5G data calls on the UE. ### Claim 9 (depends on 7) The UE of claim 7, wherein the processor is further configured to: start a back-off timer in response to disabling 5G data calls on the UE; determine whether the back-off timer has expired; and enable 5G data calls on the UE in response to determining that the back-off timer has expired. ### Claim 10 (depends on 9) The UE of claim 9, wherein the back-off timer expires one hour after starting. ### Claim 11 (depends on 9) The UE of claim 9, wherein the processor is further configured to: send a first tracking area update request to the base station of the 5G NSA network prior to receiving any EPS bearer deactivation requests from the base station of the 5G NSA network, the first tracking area update request indicating dual connectivity with new radio (DCNR) is supported by the UE; and send a second tracking area update request to the base station of the 5G NSA network in response to disabling 5G data calls on the UE, the second tracking area update request indicating DCNR is not supported. ### Claim 12 (depends on 7) The UE of claim 7, wherein the time period is sixty seconds and the maximum counter value is five. ### Claim 13 A user equipment (UE), comprising: means for determining whether a total number of Evolved Packet System (EPS) bearer deactivation requests received from a base station of a fifth generation (5G) non-standalone (NSA) network during a time period exceeds a maximum counter value; and means for disabling 5G data calls on the UE in response to determining that the total number of EPS bearer deactivation requests received from the base station of the 5G NSA network during the time period exceeds the maximum counter value. ### Claim 14 (depends on 13) The UE of claim 13, further comprising: means for falling back to fourth generation (4G) for data calls in response to disabling 5G data calls on the UE. ### Claim 15 (depends on 13) The UE of claim 13, further comprising: means for starting a back-off timer in response to disabling 5G data calls on the UE; means for determining whether the back-off timer has expired; and means for enabling 5G data calls on the UE in response to determining that the back-off timer has expired. ### Claim 16 (depends on 15) The UE of claim 15, wherein the back-off timer expires one hour after starting. ### Claim 17 (depends on 15) The UE of claim 15, further comprising: means for sending a first tracking area update request to the base station of the 5G NSA network prior to receiving any EPS bearer deactivation requests from the base station of the 5G NSA network, the first tracking area update request indicating dual connectivity with new radio (DCNR) is supported by the UE; and means for sending a second tracking area update request to the base station of the 5G NSA network in response to disabling 5G data calls on the UE, the second tracking area update request indicating DCNR is not supported. ### Claim 18 (depends on 13) The UE of claim 13, wherein the time period is sixty seconds and the maximum counter value is five. ### Claim 19 A non-transitory processor readable medium having stored thereon processor-executable instructions configured to cause a processor of a user equipment (UE) to perform operations comprising: determining whether a total number of Evolved Packet System (EPS) bearer deactivation requests received from a base station of a fifth generation (5G) non-standalone (NSA) network during a time period exceeds a maximum counter value; and disabling 5G data calls on the UE in response to determining that the total number of EPS bearer deactivation requests received from the base station of the 5G NSA network during the time period exceeds the maximum counter value. ### Claim 20 (depends on 19) The non-transitory processor readable medium of claim 19, wherein the stored processor-executable instructions are further configured to cause a processor of a UE to perform operations further comprising: falling back to fourth generation (4G) for data calls in response to disabling 5G data calls on the UE. ### Claim 21 (depends on 19) The non-transitory processor readable medium of claim 19, wherein the stored processor-executable instructions are further configured to cause a processor of a UE to perform operations further comprising: starting a back-off timer in response to disabling 5G data calls on the UE; determining whether the back-off timer has expired; and enabling 5G data calls on the UE in response to determining that the back-off timer has expired. ### Claim 22 (depends on 21) The non-transitory processor readable medium of claim 21 wherein the stored processor-executable instructions are further configured to cause a processor of a UE to perform operations such that the back-off timer expires one hour after starting. ### Claim 23 (depends on 21) The non-transitory processor readable medium of claim 21, wherein the stored processor-executable instructions are further configured to cause a processor of a UE to perform operations further comprising: sending a first tracking area update request to the base station of the 5G NSA network prior to receiving any EPS bearer deactivation requests from the base station of the 5G NSA network, the first tracking area update request indicating dual connectivity with new radio (DCNR) is supported by the UE; and sending a second tracking area update request to the base station of the 5G NSA network in response to disabling 5G data calls on the UE, the second tracking area update request indicating DCNR is not supported. ### Claim 24 (depends on 19) The non-transitory processor readable medium of claim 19, wherein the stored processor-executable instructions are further configured to cause a processor of a UE to perform operations such that the time period is sixty seconds and the maximum counter value is five.