# US 11,122,521 B2 · Method for controlling random access power of UE, UE and computer storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,521 B2 - Document ID: US11122521B2 - Status: Granted - Kind: B2 - Application number: 16/912,610 - Filed: 2020-06-25 - Published: 2020-10-15 - Granted: 2021-09-14 - Earliest claimed: 2017-12-26 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Hai Tang - Web page: https://patentgrep.com/patent/US11122521B2 ## CPC - H04W 52/282: {taking into account the speed of the mobile} - H04W 52/322: {Power control of broadcast channels} - H04W 52/36: with a discrete range or set of values, e.g. step size, ramping or offsets - H04W 52/362: {Aspects of the step size} - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 52/146: {Uplink power control} - 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 for controlling random access power of a user equipment (UE), a UE, and a computer storage medium. The method includes: receiving system broadcast information sent from a network side; obtaining a scaling factor corresponding to a speed of the UE from the system broadcast information, wherein the scaling factor corresponding to the speed of the UE comprises at least one of the following: a power adjustment parameter for the UE to perform random access, an adjustment parameter for a power ramp step, or an adjustment parameter for a random access fallback; and correcting a power in a random access procedure of the UE and a time for transmitting a preamble in the random access procedure based on the scaling factor corresponding to the speed of the UE. ## Claims ### Claim 1 A method for controlling random access power of a user equipment (UE), which is applied to the UE, wherein the method comprises: receiving system broadcast information sent from a network side; obtaining, from the system broadcast information, a scaling factor corresponding to a speed of the UE, wherein the scaling factor corresponding to the speed of the UE comprises at least one of the following: a power adjustment parameter for the UE to perform random access, an adjustment parameter for a power ramp step, or an adjustment parameter for a random access fallback, wherein the power adjustment parameter for the UE to perform random access comprises a factor or offset for a target receive power of an initially transmitted preamble for the UE to perform the random access, the adjustment parameter for the power ramp step comprises a factor or offset for the power ramp step when the UE performs the random access, and the adjustment parameter for the random access fallback comprises a factor or offset for the random access fallback; and correcting, based on the scaling factor corresponding to the speed of the UE, a power in a random access procedure of the UE and a time for transmitting a preamble in the random access procedure; wherein the method further comprises: obtaining a corrected reference value for the random access fallback based on multiplication of a random access fallback indicated by the network side and the factor for the random access fallback; or obtaining the corrected reference value for the random access fallback based on addition of the random access fallback indicated by the network side and the offset for the random access fallback; and generating a corrected value for the random access fallback according to the corrected reference value for the random access fallback, wherein the corrected value for the random access fallback is greater than zero and smaller than the corrected reference value for the random access fallback. ### Claim 2 (depends on 1) The method according to claim 1, wherein the obtaining a scaling factor corresponding to a speed of the UE comprises: determining, by the UE, a speed range corresponding to the UE based on a moving speed; and selecting, based on the speed range corresponding to the UE, a corresponding scaling factor. ### Claim 3 (depends on 1) The method according to claim 1, wherein the correcting, based on the scaling factor corresponding to the speed of the UE, a power in a random access procedure of the UE, comprises: obtaining a corrected target receive power of the initially transmitted preamble based on multiplication of the target receive power of the initially transmitted preamble for the UE to perform the random access and the factor for the target receive power of the initially transmitted preamble for the UE to perform the random access. ### Claim 4 (depends on 1) The method according to claim 1, wherein the correcting, based on the scaling factor corresponding to the speed of the UE, a power in a random access procedure of the UE, comprises: obtaining a corrected target receive power of the initially transmitted preamble based on addition of the target receive power of the initially transmitted preamble for the UE to perform the random access and the offset for the target receive power of the initially transmitted preamble for the UE to perform the random access. ### Claim 5 (depends on 1) The method according to claim 1, wherein the correcting, based on the scaling factor corresponding to the speed of the UE, a power in a random access procedure of the UE, comprises: obtaining a corrected power ramp step when the UE performs the random access based on multiplication of the power ramp step when the UE performs the random access and the factor for the power ramp step when the UE performs the random access. ### Claim 6 (depends on 1) The method according to claim 1, wherein the correcting, based on the scaling factor corresponding to the speed of the UE, a power in a random access procedure of the UE, comprises: obtaining a corrected power ramp step when the UE performs the random access based on addition of the power ramp step when the UE performs the random access and the offset for the power ramp step when the UE performs the random access. ### Claim 7 (depends on 1) The method according to claim 1, wherein the correcting a power in a random access procedure of the UE and a time for transmitting a preamble in the random access procedure comprises: determining a transmit power of the preamble based on at least one of a corrected target receive power of an initially transmitted preamble or a corrected power ramp step when the UE performs the random access; and determining the time for transmitting the preamble based on a corrected random access fallback. ### Claim 8 (depends on 1) A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores computer executable instructions, and steps of the method according to claim 1 are implemented when the computer executable instructions are executed. ### Claim 9 A user equipment (UE), comprising a processor, a network interface, and a memory for storing a computer program which is runnable on the processor, wherein the processor is configured to: control the network interface to receive system broadcast information sent from a network side; obtain a scaling factor corresponding to a speed of the UE from the system broadcast information, wherein the scaling factor corresponding to the speed of the UE comprises at least one of the following: a power adjustment parameter for the UE to perform random access, an adjustment parameter for a power ramp step, or an adjustment parameter for a random access fallback, wherein the power adjustment parameter for the UE to perform random access comprises a factor or offset for a target receive power of an initially transmitted preamble for the UE to perform the random access, the adjustment parameter for the power ramp step comprises a factor or offset for the power ramp step when the UE performs the random access, and the adjustment parameter for the random access fallback comprises a factor or offset for the random access fallback; and correct a power in a random access procedure of the UE and a time for transmitting a preamble in the random access procedure based on the scaling factor corresponding to the speed of the UE; wherein the processor is further configured to obtain a corrected random access fallback based on multiplication of a random access fallback that is randomly generated and the factor for the random access fallback; or obtain the corrected random access fallback based on addition of the random access fallback that is randomly generated and the offset for the random access fallback. ### Claim 10 (depends on 9) The UE according to claim 9, wherein the processor is further configured to: determine a speed range corresponding to the UE based on a moving speed; and select a corresponding scaling factor based on the speed range corresponding to the UE. ### Claim 11 (depends on 9) The UE according to claim 9, wherein the processor is further configured to obtain a corrected target receive power of the initially transmitted preamble based on multiplication of the target receive power of the initially transmitted preamble for the UE to perform the random access and the factor for the target receive power of the initially transmitted preamble for the UE to perform the random access. ### Claim 12 (depends on 9) The UE according to claim 9, wherein the processor is further configured to obtain a corrected target receive power of the initially transmitted preamble based on addition of the target receive power of the initially transmitted preamble for the UE to perform the random access and the offset for the target receive power of the initially transmitted preamble for the UE to perform the random access. ### Claim 13 (depends on 9) The UE according to claim 9, wherein the processor is further configured to obtain a corrected power ramp step when the UE performs the random access based on multiplication of the power ramp step when the UE performs the random access and the factor for the power ramp step when the UE performs the random access. ### Claim 14 (depends on 9) The UE according to claim 9, wherein the processor is further configured to obtain a corrected power ramp step when the UE performs the random access based on addition of the power ramp step when the UE performs the random access and the offset for the power ramp step when the UE performs the random access. ### Claim 15 (depends on 9) The UE according to claim 9, wherein the processor is further configured to: determine a transmit power of the preamble based on at least one of a corrected target receive power of an initially transmitted preamble or a corrected power ramp step when the UE performs the random access; and determine the time for transmitting the preamble based on a corrected random access fallback. ### Claim 16 A user equipment (UE), comprising a processor, a network interface, and a memory for storing a computer program which is runnable on the processor, wherein the processor is configured to: control the network interface to receive system broadcast information sent from a network side; obtain a scaling factor corresponding to a speed of the UE from the system broadcast information, wherein the scaling factor corresponding to the speed of the UE comprises at least one of the following: a power adjustment parameter for the UE to perform random access, an adjustment parameter for a power ramp step, or an adjustment parameter for a random access fallback, wherein the power adjustment parameter for the UE to perform random access comprises a factor or offset for a target receive power of an initially transmitted preamble for the UE to perform the random access, the adjustment parameter for the power ramp step comprises a factor or offset for the power ramp step when the UE performs the random access, and the adjustment parameter for the random access fallback comprises a factor or offset for the random access fallback; and correct a power in a random access procedure of the UE and a time for transmitting a preamble in the random access procedure based on the scaling factor corresponding to the speed of the UE; wherein the processor is further configured to: obtain a corrected reference value for the random access fallback based on multiplication of a random access fallback indicated by the network side and the factor for the random access fallback; or obtain the corrected reference value for the random access fallback based on addition of the random access fallback indicated by the network side and the offset for the random access fallback; and generate a corrected value for the random access fallback according to the corrected reference value for the random access fallback, wherein the corrected value for the random access fallback is greater than zero and smaller than the corrected reference value for the random access fallback.