# US 2014/0194086 A1 · Adaptive Network Searching in Out-of-Service Scenarios > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194086 A1 - Document ID: US20140194086A1 - Status: Published application - Kind: A1 - Application number: 14/152,594 - Filed: 2014-01-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Muhammad A. Alam; Giri Prassad Deivasigamani; Gaurav Nukala - Web page: https://patentgrep.com/patent/US20140194086A1 ## CPC - H04W 52/0254: {detecting a user operation or a tactile contact or a motion of the device} - H04W 48/16: Discovering, processing access restriction or access information - H04W 52/0241: {where no transmission is received, e.g. out of range of the transmitter} - H04W 48/18: Selecting a network or a communication service - H04W 52/0251: {using monitoring of local events, e.g. events related to user activity} - H04W 52/0277: {according to available power supply, e.g. switching off when a low battery condition is detected} - 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 Adaptive out-of-service search behavior by a wireless user equipment (UE) device. The UE may perform cellular communications according to a radio access technology (RAT). It may be determined that cellular service according to the RAT is not available. A search algorithm may be selected from at least two possible search algorithms. A search for cellular service according to the RAT may be performed according to the search algorithm. The various possible search algorithms may specify different ratios of time spent scanning for cellular service to time spent sleeping. The selected search algorithm may be chosen based on any or all of an estimated remaining battery life of the UE, a user activity level, user input, or various other considerations. ## Claims ### Claim 1 A non-transitory computer accessible memory medium comprising program instructions which, when executed at a wireless user equipment (UE) device, cause the UE to: perform cellular communications according to a first radio access technology (RAT); determine that cellular service according to the first RAT is not available; determine a user activity level of the UE; select a first search algorithm from at least two possible search algorithms, wherein the first search algorithm is selected based at least in part on the determined user activity level of the UE; and perform a first search for cellular service according to the first RAT, wherein the first search is performed according to the first search algorithm. ### Claim 2 (depends on 1) The memory medium of claim 1, wherein the user activity level is determined based on one or more user activity level indicators, wherein the one or more user activity level indicators comprise one or more of: a state of a display of the UE; a state of an application processor of the UE; or presence or absence of active user-initiated data transfers. ### Claim 3 (depends on 1) The memory medium of claim 1, wherein the program instructions further cause the UE to: estimate remaining battery life of the UE; wherein the first search algorithm is selected based at least in part on the estimated remaining battery life of the UE. ### Claim 4 (depends on 1) The memory medium of claim 1, wherein the program instructions further cause the UE to: receive user input via a user interface; wherein the first search algorithm is selected based at least in part on the received user input. ### Claim 5 (depends on 1) The memory medium of claim 1, wherein the program instructions further cause the UE to: determine that one or more pre-configured conditions for modifying out-of-service search behavior of the UE have occurred; select a second search algorithm from the at least two possible search algorithms based on the one or more pre-configured conditions having occurred; interrupt the first search and initiate a second search for cellular service according to the first RAT, wherein the second search is performed according to the second search algorithm. ### Claim 6 (depends on 5) The memory medium of claim 5, wherein the one or more pre-configured conditions comprise one or more of: crossing a pre-configured estimated remaining battery life threshold; crossing a pre-configured user activity level threshold; or receiving user input specifying a modification of out-of-service search behavior of the UE. ### Claim 7 (depends on 5) The memory medium of claim 5, wherein the first search algorithm and the second search algorithm each specify that the UE alternately scan for cellular service according to the first RAT and sleep, wherein the first search algorithm specifies a higher ratio of time spent scanning for cellular service to time spent sleeping than the second search algorithm. ### Claim 8 A wireless user equipment (UE) device, the UE comprising: a radio, comprising one or more antennas for performing wireless communication; a processing element operably coupled to the radio; wherein the radio and the processing element are configured to: establish a wireless link with a base station, wherein the base station acts as a serving cell for the UE; determine that the wireless link with the base station has been broken; perform a search for cellular service according to a first search configuration based on determining that the wireless link with the base station has been broken; detect a first pre-configured condition for modifying the search configuration, wherein the first pre-determined condition comprises user activity crossing a user activity threshold; and perform a search for cellular service according to a second search configuration based on determining that the wireless link with the base station has been broken and detecting the first pre-configured condition for modifying the search configuration. ### Claim 9 (depends on 8) The UE of claim 8, wherein the UE is configured to detect the first pre-determined condition based on one or more user activity level indicators, wherein the one or more user activity level indicators comprise one or more of: a state of a display of the UE; a state of an application processor of the UE; or presence or absence of active user-initiated data transfers ### Claim 10 (depends on 8) The UE of claim 8, wherein the first pre-determined condition further comprises crossing a battery level threshold. ### Claim 11 (depends on 8) The UE of claim 8, wherein the second search configuration specifies a lesser proportion of search time to sleep time than the first search configuration. ### Claim 12 (depends on 8) The UE of claim 8, wherein the radio and the processing element are further configured to: detect a second pre-configured condition for modifying the search configuration; and perform a search for cellular service according to a third search configuration based on determining that the wireless link with the base station has been broken and detecting the second pre-configured condition for modifying the search configuration. ### Claim 13 A method for operating a wireless user equipment (UE) device, the method comprising: detecting an out-of-service (OOS) condition; at a first time: determining that a user activity level of the UE is above a first threshold; and performing a search for cellular service in a first manner based on determining that the user activity level of the UE is above the first threshold; and at a second time: determining that the user activity level of the UE is below the first threshold; and performing a search for cellular service in a second manner based on determining that the user activity level of the UE is below the first threshold. ### Claim 14 (depends on 13) The method of claim 13, wherein the method further comprises, at each of the first time and the second time: determining whether battery level of the UE is above or below a battery level threshold, wherein performing the search for cellular service in the first manner at the first time and performing the search for cellular service in the second manner at the second time are also based on determining whether battery level of the UE is above or below the battery level threshold. ### Claim 15 (depends on 13) The method of claim 13, wherein performing a search for cellular service comprises alternately scanning one or more frequency bands for cellular signals and sleeping according to a pre-configured schedule, wherein a larger proportion of time is spent sleeping while performing a search for cellular service in the second manner than while performing a search for cellular service in the first manner. ### Claim 16 (depends on 13) The method of claim 13, wherein the method further comprises: receiving user input configuring at least one condition for adaptively modifying OOS search behavior of the UE; and receiving user input configuring at least two search configurations for performing OOS network searches. ### Claim 17 (depends on 16) The method of claim 16, wherein the at least one condition comprises the user activity level of the UE crossing the first threshold. ### Claim 18 (depends on 17) The method of claim 17, wherein the at least one condition is based on one or more user activity level indicators, wherein the one or more user activity level indicators comprise one or more of: a state of a display of the UE; a state of an application processor of the UE; or presence or absence of active user-initiated data transfers. ### Claim 19 (depends on 16) The method of claim 16, wherein performing the search for cellular service in the first manner at the first time comprises utilizing a first search configuration of the at least two search configurations, wherein performing the search for cellular service in the second manner at the second time comprises utilizing a second search configuration of the at least two search configurations. ### Claim 20 (depends on 16) The method of claim 16, the method further comprising: receiving user input re-configuring one or more of the at least one condition for adaptively modifying OOS search behavior of the UE or the at least two search configurations for performing OOS network searches; performing subsequent OOS network searches according to the re-configured at least one condition for adaptively modifying OOS search behavior of the UE and at least two search configurations for performing OOS network searches.