# US 10,772,033 B2 · Avoiding reselection of a fake cell in a wireless communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,033 B2 - Document ID: US10772033B2 - Status: Granted - Kind: B2 - Application number: 15/416,718 - Filed: 2017-01-26 - Published: 2017-07-27 - Granted: 2020-09-08 - Earliest claimed: 2016-01-27 - Assignees: MediaTek Singapore Pte. Ltd. - Applicants: MediaTek Singapore Pte. Ltd. - Inventors: Matti Moisanen; Marko Niemi - Web page: https://patentgrep.com/patent/US10772033B2 ## CPC - H04W 48/16: Discovering, processing access restriction or access information - H04B 7/0413: MIMO systems - H04B 7/0417: Feedback systems - H04B 7/0452: Multi-user MIMO systems - H04B 7/0613: {using simultaneous transmission (H04B7/0686 takes precedence)} - H04L 1/06: using space diversity - H04W 16/18: Network planning tools - H04W 16/24: Cell structures - H04W 48/20: Selecting an access point - H04W 52/242: {taking into account path loss} - H01Q 1/246: {specially adapted for base stations} - H01Q 25/002: {providing at least two patterns of different beamwidth; Variable beamwidth antennas} - H04L 1/0681: {adapting space time parameters, i.e. modifying the space time matrix} - H04L 1/0687: {Full feedback} - H04W 24/06: Testing, {supervising or monitoring} using simulated traffic - H04W 88/02: Terminal devices - 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) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - 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 Aspects of the disclosure provide a method for avoiding reselection of fake cell. The method includes transmitting a first request for network service of a wireless communication network in a first cell from user equipment, receiving a first reject message without integrity protection, adding the first cell to a set-aside cell list, and selecting a cell from other cells that are not included in the set-aside cell list to request network service. ## Claims ### Claim 1 A method, comprising: transmitting a first request for a network service in a first cell of a wireless communication network of a radio access technology (RAT) belonging to a selected public land mobile network (PLMN) from user equipment; receiving a first reject message without integrity protection in the first cell of the wireless communication network of the RAT belonging to the selected PLMN at the user equipment; in response to receiving the first reject message, adding the first cell of the wireless communication network of the RAT belonging to the selected PLMN to a set-aside cell list that uses a cell identity (ID) to represent each cell on the set-aside cell list, wherein each cell on the set-aside cell list is added to the set-aside cell list in response to receiving a reject message without integrity protection in the respective cell; and in response to receiving the first reject message, selecting a cell from other cells of the wireless communication network of the RAT belonging to the selected PLMN that are not included in the set-aside cell list to request the network service, wherein the selected cell and the first cell belong to the same PLMN, and are of the same RAT. ### Claim 2 (depends on 1) The method of claim 1, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service includes: selecting a second cell excluded from the set-aside cell list to transmit a second request for the network service; and when a second reject message without integrity protection is received, adding the second cell to the set-aside cell list. ### Claim 3 (depends on 2) The method of claim 2, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: repeating selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until a second request for the network service is accepted. ### Claim 4 (depends on 3) The method of claim 3, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: repeating selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until times of receiving the second reject messages reach a threshold. ### Claim 5 (depends on 4) The method of claim 4, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: when no more cells are available for selection, allowing to request network services from cells previously added to the set-aside cell list. ### Claim 6 (depends on 1) The method of claim 1, further comprising: allowing to request network services from a third cell previously added to the set-aside cell list after the third cell has been added to the set-aside cell list for a preconfigured period of time. ### Claim 7 (depends on 1) The method of claim 1, further comprising: allowing to request network services from a fourth cell previously added to the set-aside cell list when the user equipment travels a preconfigured distance from a location where the fourth cell is added to the set-aside cell list. ### Claim 8 (depends on 1) The method of claim 1, wherein the first reject message indicates the user equipment is illegal mobile equipment. ### Claim 9 (depends on 1) The method of claim 1, wherein the selected cell and the first cell have same system information. ### Claim 10 User equipment, comprising processing circuitry configured to: transmit a first request for a network service in a first cell of a wireless communication network of a radio access technology (RAT) belonging to a selected public land mobile network (PLMN) from user equipment; receive a first reject message without integrity protection in the first cell of the wireless communication network of the RAT belonging to the selected PLMN; in response to receiving the first message, add the first cell of the wireless communication network of the RAT belonging to the selected PLMN to a set-aside cell list that uses a cell identity (ID) to represent each cell on the set-aside cell list, wherein each cell on the set-aside cell list is added to the set-aside cell list in response to receiving a reject message without integrity protection in the respective cell; and in response to receiving the first reject message, select a cell from other cells of the wireless communication network of the RAT belonging to the selected PLMN that are not included in the set-aside cell list to request the network service, wherein the selected cell and the first cell belong to the same PLMN, and are of the same RAT. ### Claim 11 (depends on 10) The user equipment of claim 10, wherein the processing circuitry is further configured to: select a second cell excluded from the set-aside cell list to transmit a second request for the network service; and when a second reject message without integrity protection is received, add the second cell to the set-aside cell list. ### Claim 12 (depends on 11) The user equipment of claim 11, wherein the processing circuitry is further configured to: repeat selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until a second request for the network service is accepted. ### Claim 13 (depends on 12) The user equipment of claim 12, wherein the processing circuitry is further configured to: repeat selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until times of receiving the second reject messages reach a threshold. ### Claim 14 (depends on 13) The user equipment of claim 13, wherein the processing circuitry is further configured to: when no more cells are available for selection, allow to request network services from cells previously added to the set-aside cell list. ### Claim 15 (depends on 10) The user equipment of claim 10, wherein the processing circuitry is further configured to: allow to request network services from a third cell previously added to the set-aside cell list after the third cell has been added to the set-aside cell list for a preconfigured period of time. ### Claim 16 (depends on 10) The user equipment of claim 10, wherein the processing circuitry is further configured to: allow to request network services from a fourth cell previously added to the set-aside cell list when the user equipment travels a preconfigured distance from a location where the fourth cell is added to the set-aside cell list. ### Claim 17 A non-transitory computer readable medium storing program instructions for causing a processor to perform operations, the operations comprising: transmitting a first request for a network service in a first cell of a wireless communication network of the wireless communication network of the RAT belonging to the selected PLMN from user equipment; receiving a first reject message without integrity protection in the first cell of the wireless communication network of the RAT belonging to the selected PLMN at the user equipment; in response to receiving the first reject message, adding the first cell of the wireless communication network of the RAT belonging to the selected PLMN to a set-aside cell list that uses a cell identity (ID) to represent each cell on the set-aside cell list, wherein each cell on the set-aside cell list is added to the set-aside cell list in response to receiving a reject message without integrity protection in the respective cell; and in response to receiving the first reject message, selecting a cell from other cells of the wireless communication network of the wireless communication network of the RAT belonging to the selected PLMN that are not included in the set-aside cell list to request the network service, wherein the selected cell and the first cell belong to the same PLMN, and are of the same RAT. ### Claim 18 (depends on 17) The non-transitory computer readable medium of claim 17, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service includes: selecting a second cell excluded from the set-aside cell list to transmit a second request for the network service: and when a second reject message without integrity protection is received, adding the second cell to the set-aside cell list. ### Claim 19 (depends on 18) The non-transitory computer readable medium of claim 18, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: repeating selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until a second request for the network service is accepted. ### Claim 20 (depends on 19) The non-transitory computer readable medium of claim 19, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: repeating selecting a second cell excluded from the set-aside cell list and adding the second cell to the set-aside cell list when a second reject message without integrity protection is received until times of receiving the second reject messages reach a threshold. ### Claim 21 (depends on 20) The non-transitory computer readable medium of claim 20, wherein selecting a cell from other cells of the same wireless communication network that are not included in the set-aside cell list to request network service further includes: when no more cells are available for selection, allowing to request network services from cells previously added to the set-aside cell list. ### Claim 22 (depends on 17) The non-transitory computer readable medium of claim 17, wherein the operations further comprising: allowing to request network services from a third cell previously added to the set-aside cell list after the third cell has been added to the set-aside cell list for a preconfigured period of time.