# US 2019/0357176 A1 · Communication device and a method for operating a communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357176 A1 - Document ID: US20190357176A1 - Status: Published application - Kind: A1 - Application number: 16/305,067 - Filed: 2017-05-29 - Published: 2019-11-21 - Earliest claimed: 2016-06-29 - Assignees: Intel IP Corporation - Applicants: Intel IP Corporation - Inventors: Kristian BISS; Roland GRUBER - Web page: https://patentgrep.com/patent/US20190357176A1 ## CPC - H04W 48/18: Selecting a network or a communication service - H04W 72/02: Selection of wireless resources by user or terminal - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/56: based on priority criteria - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 48/12: using downlink control channel - H04W 48/20: Selecting an access point - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and a mobile device configured, when in idle mode, to select a target frequency from a network in response to a redistribution information from the network, including starting an evaluation timer; performing measurements on a first set of frequencies throughout a duration of the evaluation timer; selecting the target frequency based on the measurements of the first set of frequencies; and starting a second timer, which is distinct from the evaluation timer, during which time the device performs measurements on a second set of frequencies comprising the target frequency. ## Claims ### Claim 1 A communication device configured to select a target frequency from a network in response to a redistribution information, comprising: a radio frequency transceiver configured to receive a redistribution information from the network; a baseband modem configured to: trigger an evaluation timer; perform measurements on a first set of frequencies throughout a duration of the evaluation timer; select the target frequency based on the measurements of the first set of frequencies; and trigger a second timer, which is distinct from the evaluation timer, during which the device performs measurements on a second set of frequencies comprising the target frequency. ### Claim 2 (depends on 1) The communication device of claim 1, wherein the first set of frequencies comprises inter-frequencies with the redistribution information provided to the communication device from the network. ### Claim 3 (depends on 1) The communication device of claim 1, wherein the evaluation timer is a Radio Resource Control (RRC) timer. ### Claim 4 (depends on 1) The communication device of claim 1, the baseband modem further configured to calculate the duration of the evaluation timer based on a number of inter-frequency carriers. ### Claim 5 (depends on 1) The communication device of claim 1, the baseband modem further configured to calculate the duration of the evaluation timer based on a time needed to detect new cells. ### Claim 6 (depends on 5) The communication device of claim 5, the baseband modem further configured to calculate the duration of the evaluation timer by multiplying the number of inter-frequency carriers by the time needed to detect new cells. ### Claim 7 (depends on 1) The communication device of claim 1, the baseband modem further configured to calculate the duration of the evaluation timer based on a discontinuous reception (DRX) cycle length. ### Claim 8 (depends on 7) The communication device of claim 7, wherein the duration of the evaluation timer is at least two times the DRX cycle length. ### Claim 9 (depends on 1) The communication device of claim 1, the baseband modem further configured to measure each frequency at least two times throughout the duration of the evaluation timer. ### Claim 10 (depends on 1) The communication device of claim 1, wherein the duration of the evaluation timer is at most about one-half the length of the second timer. ### Claim 11 (depends on 1) The communication device of claim 1, the baseband modem further configured to perform a redistribution algorithm in order to select the target frequency. ### Claim 12 (depends on 1) The communication device of claim 1, wherein the second timer is a T360 timer. ### Claim 13 (depends on 1) The communication device of claim 1, the baseband modem further configured to disregard measuring one or more frequencies indicated in a redistribution information from the network during the second timer if the one or more frequencies are not high priority frequencies. ### Claim 14 (depends on 1) The communication device of claim 1, wherein the second set of frequencies comprises fewer frequencies than the first set of frequencies. ### Claim 15 A method for a mobile device in idle mode to select a target frequency from a network in response to a redistribution information, comprising: starting an evaluation timer; performing measurements on a first set of frequencies throughout a duration of the evaluation timer; selecting the target frequency based on the measurements of the first set of frequencies; and starting a second timer, which is distinct from the evaluation timer, during which the device performs measurements on a second set of frequencies comprising the target frequency. ### Claim 16 (depends on 15) The method of claim 15, wherein the first set of frequencies comprises inter-frequencies with the redistribution information provided to the device from the network. ### Claim 17 (depends on 15) The method of claim 15, further comprising calculating the duration of the evaluation timer based on a number of inter-frequency carriers. ### Claim 18 (depends on 15) The method of claim 15, further comprising calculating the duration of the evaluation timer based on a time needed to detect new cells. ### Claim 19 (depends on 15) The method of claim 15, further comprising calculating the duration of the evaluation timer based on a discontinuous reception (DRX) cycle length. ### Claim 20 (depends on 15) The method of claim 15, further comprising determining the duration of the evaluation timer by waiting for the results from a layer 1 component of the device for all cells detected during the frequency measurement while the evaluation timer is running. ### Claim 21 (depends on 15) The method of claim 15, wherein the duration of the evaluation timer is at most one-half the length of the second timer. ### Claim 22 (depends on 15) The method of claim 15, further comprising measuring each frequency at least two times throughout the duration of the evaluation timer ### Claim 23 A non-transitory computer readable medium storing instructions thereon that, when executed, cause a processor of a device to perform a selection of a target frequency from a network in response to a redistribution information comprising: starting an evaluation timer; performing measurements on a first set of frequencies throughout a duration of the evaluation timer; selecting the target frequency based on the measurements of the first set of frequencies; and starting a second timer, which is distinct from the evaluation timer, during which the device performs measurements on a second set of frequencies comprising the target frequency. ### Claim 24 (depends on 23) The non-transitory computer readable medium of claim 23, further comprising measuring each frequency at least two times throughout the duration of the evaluation timer. ### Claim 25 (depends on 23, 24) The non-transitory computer readable medium of claim 23 or 24, wherein the duration of the evaluation timer is at most one-half the length of the second timer.