# US 12,004,227 B2 · Uplink carrier selection based on power threshold and speed > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,227 B2 - Document ID: US12004227B2 - Status: Granted - Kind: B2 - Application number: 17/895,555 - Filed: 2022-08-25 - Published: 2022-12-29 - Granted: 2024-06-04 - Earliest claimed: 2018-02-17 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Kyungmin Park; Esmael Hejazi Dinan; Hyoungsuk Jeon; Hua Zhou; Alireza Babaei; Ali Cagatay Cirik - Web page: https://patentgrep.com/patent/US12004227B2 ## CPC - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 72/0473: {the resource being transmission power} - H04W 72/542: using measured or perceived quality - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 64/006: {with additional information processing, e.g. for direction or speed determination} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 74/0838: using contention-free random access [CFRA] - H04W 74/0866: {using a dedicated channel for access} - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A wireless device receives at least one power threshold for selecting one of a first uplink carrier or a second uplink carrier of a cell. The wireless device selects, based on the at least one power threshold and a speed of the wireless device, one of the first uplink carrier and the second uplink carrier as a selected uplink carrier. The wireless device transmits a random access preamble via the selected uplink carrier. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, a power threshold and a scaling factor for selecting one of a first uplink carrier or a second uplink carrier of a cell; scaling the power threshold by the scaling factor based on a comparison of a speed of the wireless device and a speed-threshold value; determining signal powers of the first and the second uplink carriers based on received reference signals; comparing the determined signal powers to the power threshold; selecting, based on the comparison, one of the first uplink carrier and the second uplink carrier as a selected uplink carrier; and transmitting a random access preamble via the selected uplink carrier. ### Claim 2 (depends on 1) The method of claim 1, wherein the wireless device employs the scaling factor based on a service type of the wireless device. ### Claim 3 (depends on 1) The method of claim 1, wherein the first uplink carrier comprises a normal uplink carrier. ### Claim 4 (depends on 1) The method of claim 1, wherein the second uplink carrier comprises a supplementary uplink carrier. ### Claim 5 (depends on 1) The method of claim 1, wherein the first uplink carrier employs a higher frequency than the second uplink carrier. ### Claim 6 (depends on 1) The method of claim 1, further comprising receiving at least one of: a first bandwidth information of the first uplink carrier; or a second bandwidth information of the second uplink carrier. ### Claim 7 (depends on 1) The method of claim 1, wherein the cell is configured with at least one of: a time division duplex; or a frequency division duplex. ### Claim 8 (depends on 1) The method of claim 1, wherein the first uplink carrier covers a smaller area than the second uplink carrier. ### Claim 9 (depends on 1) The method of claim 1, wherein the wireless device is in a radio resource control idle state or in a radio resource control inactive state. ### Claim 10 (depends on 1) The method of claim 1, wherein the wireless device employs the scaling factor when the speed of the wireless device is higher than the speed-threshold value. ### Claim 11 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to perform operations comprising: receiving a power threshold and a scaling factor for selecting one of a first uplink carrier or a second uplink carrier of a cell; scaling the power threshold by the scaling factor based on a comparison of a speed of the wireless device and a speed-threshold value; determining signal powers of the first and the second uplink carriers based on received reference signals; comparing the determined signal powers to the power threshold; selecting, based on the comparison, one of the first uplink carrier and the second uplink carrier as a selected uplink carrier; and transmitting a random access preamble via the selected uplink carrier. ### Claim 12 (depends on 11) The wireless device of claim 11, wherein the wireless device employs the scaling factor based on a service type of the wireless device. ### Claim 13 (depends on 11) The wireless device of claim 11, wherein the first uplink carrier comprises a normal uplink carrier. ### Claim 14 (depends on 11) The wireless device of claim 11, wherein the second uplink carrier comprises a supplementary uplink carrier. ### Claim 15 (depends on 11) The wireless device of claim 11, wherein the first uplink carrier employs a higher frequency than the second uplink carrier. ### Claim 16 (depends on 11) The wireless device of claim 11, wherein the operations further comprise receiving at least one of: a first bandwidth information of the first uplink carrier; or a second bandwidth information of the second uplink carrier. ### Claim 17 (depends on 11) The wireless device of claim 11, wherein the cell is configured with at least one of: a time division duplex; or a frequency division duplex. ### Claim 18 (depends on 11) The wireless device of claim 11, wherein the first uplink carrier covers a smaller area than the second uplink carrier. ### Claim 19 A system comprising: a base station comprising: one or more first processors; and first memory storing first instructions that, when executed by the one or more first processors, cause the base station to transmit a power threshold, a scaling factor, and a reference signal for selecting one of a first uplink carrier or a second uplink carrier of a cell; and a wireless device comprising: one or more second processors; and second memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to: receive the power threshold, the scaling factor, and the reference signal; scale the power threshold by the scaling factor based on a comparison of a speed of the wireless device and a speed-threshold value; determine signal powers of the first and the second uplink carriers based on received reference signals; compare the determined signal powers to the power threshold; select, based on the comparison, one of the first uplink carrier and the second uplink carrier as a selected uplink carrier; and transmit a random access preamble via the selected uplink carrier. ### Claim 20 (depends on 11) The wireless device of claim 11, wherein the wireless device employs the scaling factor when the speed of the wireless device is higher than the speed-threshold value.