# US 11,910,260 B2 · Cell selection method and device, user equipment, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,260 B2 - Document ID: US11910260B2 - Status: Granted - Kind: B2 - Application number: 17/354,915 - Filed: 2021-06-22 - Published: 2022-07-28 - Granted: 2024-02-20 - Earliest claimed: 2021-01-25 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Wei Chen; Guangkuo Niu; Xinnan Wu - Web page: https://patentgrep.com/patent/US11910260B2 ## CPC - H04W 36/36: by user or terminal equipment - H04W 36/008375: {based on historical data} - H04W 36/14: Reselecting a network or an air interface - H04W 36/24: Reselection being triggered by specific parameters - H04W 36/302: {due to low signal strength} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The embodiments of the disclosure relate to a cell selection method and device, user equipment (UE), and a storage medium. The cell selection method may include: a parameter value of a transmission link allocated to the UE by a network side is acquired; and responsive to determining, according to the parameter value, that the transmission link allocated to the UE does not support a transmission requirement of a present service scenario of the UE, cell selection of the UE is triggered. ## Claims ### Claim 1 A cell selection method, applied to user equipment (UE), comprising: determining whether reference signal strength of a serving cell of the UE meets a first triggering condition; determining to execute a second triggering condition responsive to that the reference signal strength of the serving cell of the UE does not meet the first triggering condition; wherein the second triggering condition of determining whether to trigger the UE to perform cell selection based on a parameter value of a transmission link allocated to the UE by a network side; acquiring the parameter value of the transmission link allocated to the UE by the network side; and triggering cell selection of the UE responsive to determining, according to the parameter value, that the transmission link allocated to the UE does not support a transmission requirement of a present service scenario of the UE, wherein triggering the cell selection of the UE responsive to determining, according to the parameter value, that the transmission link allocated to the UE does not support the transmission requirement of the present service scenario of the UE comprises: triggering the cell selection of the UE responsive to determining, according to the parameter value, at least one of following: a transmission resource of the transmission link allocated to the UE not supporting a resource quantity required by transmission of the present service scenario of the UE; or transmission quality of the transmission link allocated to the UE not supporting quality of service (QoS) of the present service scenario of the UE. ### Claim 2 (depends on 1) The method of claim 1, wherein the transmission link comprises an uplink (UL) and a downlink; wherein the triggering cell selection of the UE responsive to determining, according to the parameter value, that the transmission link allocated to the UE does not support the transmission requirement of the present service scenario of the UE comprises: triggering cell selection of the UE responsive to determining, according to the parameter value, that at least one of the UL or the downlink allocated to the UE does not support the transmission requirement of the present service scenario of the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein acquiring a resource parameter allocated to the UE by the network side comprises acquiring at least one of: a parameter value of a downlink allocated to the UE by the network side; or a parameter value of an uplink (UL) allocated to the UE by the network side; wherein the parameter value of the downlink comprises at least one of following parameters: reference signal received power (RSRP) of the downlink; a signal to noise ratio (SNR) of the downlink; or a bit error rate of the downlink; wherein the parameter value of the UL comprises at least one of following parameters: a UL grant of the UL; a buffer size report (BSR) to be transmitted through the UL; a channel quality indication (CQI) of the UL; a link loss of the UL; or a modulation and coding scheme (MCS) of the UL. ### Claim 4 (depends on 1) The method of claim 1, wherein the determining to execute the second triggering condition responsive to that the reference signal strength of the serving cell of the UE does not meet the first triggering condition comprises: determining to execute the second triggering condition responsive to that the reference signal strength of the serving cell of the UE does not meet the first triggering condition and the present service scenario of the UE is a preset service scenario. ### Claim 5 (depends on 4) The method of claim 4, further comprising: determining to execute the first triggering condition responsive to that the present service scenario of the UE is not the preset service scenario. ### Claim 6 (depends on 4) The method of claim 4, wherein the preset service scenario comprises at least one of following scenarios: the UE has started an application in a preset application list; the UE has activated a function in a preset function list; or a preset phenomenon that the transmission requirement of the present service scenario is not met occurs during present running of the UE. ### Claim 7 (depends on 6) The method of claim 6, wherein the preset phenomenon comprises at least one of following events: a buffer queue of a present data packet to be transmitted of the UE is full; a packet loss phenomenon occurs to the buffer queue of the present data packet to be transmitted of the UE; the packet loss phenomenon occurs when the UE receives a data packet; a transmission delay of a data packet transmitted by the UE reaches a preset delay value; a nonfluency phenomenon occurs when a user interface (UI) of the UE is switched; or the nonfluency phenomenon occurs when multimedia information is played through a play window in the UI of the UE. ### Claim 8 (depends on 1) The method of claim 1, further comprising: triggering cell selection of the UE responsive to that reference signal quality of the serving cell of the UE does not support the first triggering condition. ### Claim 9 (depends on 1) The method of claim 1, further comprising: determining the transmission requirement of the present service scenario of the UE according to preset information; wherein the preset information comprises at least one of following data: present running information of the present service scenario; historical running information of the present service scenario; operational behavior information in the present service scenario; or attribute information of the present service scenario, the attribute information at least comprising an application type of an application corresponding to the present service scenario. ### Claim 10 A cell selection device, applied to a user equipment (UE), comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to: determine whether reference signal strength of a serving cell of the UE meets a first triggering condition; determine to execute a second triggering condition responsive to that the reference signal strength of the serving cell of the UE does not meet the first triggering condition; wherein the second triggering condition of determining whether to trigger the UE to perform cell selection based on a parameter value of a transmission link allocated to the UE by a network side; acquire the parameter value of the transmission link allocated to the UE by the network side; and trigger cell selection of the UE responsive to determining, according to the parameter value, that the transmission link allocated to the UE does not support a transmission requirement of a present service scenario of the UE, wherein the processor is further configured to trigger the cell selection of the UE responsive to determining, according to the parameter value, at least one of following: a transmission resource of the transmission link allocated to the UE not supporting a resource quantity required by transmission of the present service scenario of the UE; or transmission quality of the transmission link allocated to the UE not supporting quality of service (QoS) of the present service scenario of the UE. ### Claim 11 (depends on 10) The device of claim 10, wherein the transmission link comprises an uplink (UL) and a downlink; wherein the processor is specifically configured to trigger cell selection of the UE responsive to determining, according to the parameter value, that at least one of the UL or the downlink allocated to the UE does not support the transmission requirement of the present service scenario of the UE. ### Claim 12 (depends on 10) The device of claim 10, wherein the processor is specifically configured to acquire at least one of: a parameter value of a downlink allocated to the UE by the network side, or a parameter value of an uplink (UL) allocated to the UE by the network side; wherein the parameter value of the downlink comprises at least one of following parameters: reference signal received power (RSRP) of the downlink; a signal to noise ratio (SNR) of the downlink; or a bit error rate of the downlink; wherein the parameter value of the UL comprises at least one of following parameters: a UL grant of the UL; a buffer size report (BSR) to be transmitted through the UL; a channel quality indication (CQI) of the UL; a link loss of the UL; or a modulation and coding scheme (MCS) of the UL. ### Claim 13 (depends on 10) The device of claim 10, wherein the processor is configured to determine to execute the second triggering condition responsive to that the reference signal strength of the serving cell of the UE does not meet the first triggering condition and the present service scenario of the UE is a preset service scenario. ### Claim 14 (depends on 13) The device of claim 13, wherein the processor is further configured to: determine to execute the first triggering condition responsive to that the present service scenario of the UE is not the preset service scenario. ### Claim 15 (depends on 13) The device of claim 13, wherein the preset service scenario comprises at least one of following scenarios: the UE has started an application in a preset application list; the UE has activated a function in a preset function list; or a preset phenomenon that the transmission requirement of the present service scenario is not met occurs during present running of the UE. ### Claim 16 (depends on 15) The device of claim 15, wherein the preset phenomenon comprises at least one of following events: a buffer queue of a present data packet to be transmitted of the UE is full; a packet loss phenomenon occurs to the buffer queue of the present data packet to be transmitted of the UE; the packet loss phenomenon occurs when the UE receives a data packet; a transmission delay of a data packet transmitted by the UE reaches a preset delay value; or a nonfluency phenomenon occurs when a user interface (UI) of the UE is switched. ### Claim 17 (depends on 10) The device of claim 10, wherein the processor is further configured to: trigger cell selection of the UE responsive to that reference signal quality of the serving cell of the UE does not support the first triggering condition. ### Claim 18 (depends on 10) The device of claim 10, wherein the processor is further configured to: determine the transmission requirement of the present service scenario of the UE according to preset information; wherein the preset information comprises at least one of following data: present running information of the present service scenario; historical running information of the present service scenario; operational behavior information in the present service scenario; or attribute information of the present service scenario, the attribute information at least comprising an application type of an application corresponding to the present service scenario.