# US 12,003,460 B2 · Data transmission using bandwidth parts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,460 B2 - Document ID: US12003460B2 - Status: Granted - Kind: B2 - Application number: 17/288,059 - Filed: 2018-11-05 - Published: 2021-12-09 - Granted: 2024-06-04 - Earliest claimed: 2018-11-05 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Daniela Laselva; Frank Frederiksen; Klaus Ingemann Pedersen - Web page: https://patentgrep.com/patent/US12003460B2 ## CPC - H04L 5/0092: {Indication of how the channel is divided} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1848: {Time-out mechanisms} - H04L 1/188: {Time-out mechanisms} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 72/044: based on the type of the allocated resource - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 includes: detecting a need for a retransmission of a data transmission on one or more bandwidth parts (BWP) between a user apparatus and a radio access network; and in response to detecting the need for the retransmission, resetting a timer, wherein an expiration of the timer causes automatic switching from using the one or more BWPs for the data transmission to using a default BWP for the data transmission. ## Claims ### Claim 1 An apparatus comprising: processing circuitry; and memory circuitry including computer program code, where the memory circuitry and the computer program code configured to, with the processing circuitry, cause the apparatus to: detect a need for a retransmission of a data transmission on one or more bandwidth parts (BWP) between a user apparatus and a radio access network in response to triggering a hybrid automatic repeat request negative acknowledgement (HARQ-NACK) indications to the radio access network; and in response to detecting the need for the retransmission, reset a BWP-HARQ inactivity timer to a time value that is larger than the following: a maximum number of consecutive new radio units until a downlink retransmission is received multiplied by a minimum amount of new radio units before a downlink assignment for HARQ retransmission is expected by a media access control entity, wherein an expiration of the timer is configured to cause automatic switching from using the one or more bandwidth parts for the data transmission to using a default bandwidth part for the data transmission. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the new radio units refer to a scheduling time unit. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the data transmission is sent or received. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the user apparatus is portable computing device that includes wireless mobile communication devices. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the BWP-HARQ inactivity timer is a new BWP-HARQ inactivity timer. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the one or more bandwidth parts is one or more active bandwidth parts of a component carrier allocated during a connected mode for the user apparatus. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the default bandwidth part is an initial active bandwidth part allocated during an initial access with the user apparatus. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the apparatus is the user apparatus. ### Claim 9 A method comprising: detecting a need for a retransmission of a data transmission on one or more bandwidth parts BWP between a user apparatus and a radio access network in response to triggering a hybrid automatic repeat request negative acknowledgement (HARQ-NACK) indications to the radio access network; and in response to detecting the need for the retransmission, resetting a BWP-HARQ inactivity timer to a time value that is larger than the following: a maximum number of consecutive new radio units until a downlink retransmission is received multiplied by a minimum amount of new radio units before a downlink assignment for HARQ retransmission is expected by a media access control entity, wherein an expiration of the timer causes automatic switching from using the one or more bandwidth parts for the data transmission to using a default bandwidth part for the data transmission. ### Claim 10 (depends on 9) The method of claim 9, wherein the new radio units refer to a scheduling time unit. ### Claim 11 (depends on 9) The method of claim 9, wherein the user apparatus is portable computing device that includes wireless mobile communication devices. ### Claim 12 (depends on 9) The method of claim 9, wherein the data transmission is sent or received. ### Claim 13 (depends on 9) The method of claim 9, wherein the BWP-HARQ inactivity timer is a new BWP-HARQ inactivity timer. ### Claim 14 (depends on 9) The method of claim 9, wherein the one or more bandwidth parts is one or more active bandwidth parts of a component carrier allocated during a connected mode for the user apparatus. ### Claim 15 (depends on 9) The method of claim 9, wherein the default bandwidth part is an initial active bandwidth part allocated during an initial access with the user apparatus. ### Claim 16 A non-transitory computer-readable medium comprising computer program code, which, when loaded into one or more processors and executed by the one or more processors, causes an apparatus to perform a method comprising: detecting a need for a retransmission of a data transmission on one or more bandwidth parts BWP between a user apparatus and a radio access network in response to triggering a hybrid automatic repeat request negative acknowledgement (HARQ-NACK) indications to the radio access network; and in response to detecting the need for the retransmission, resetting a BWP-HARQ inactivity timer to a time value that is larger than the following: a maximum number of consecutive new radio units until a downlink retransmission is received multiplied by a minimum amount of new radio units before a downlink assignment for HARQ retransmission is expected by a media access control entity, wherein an expiration of the timer causes automatic switching from using the one or more bandwidth parts for the data transmission to using a default bandwidth part for the data transmission. ### Claim 17 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the new radio units refer to a scheduling time unit. ### Claim 18 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the user apparatus is portable computing device that includes wireless mobile communication devices. ### Claim 19 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the data transmission is sent or received. ### Claim 20 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the BWP-HARQ inactivity timer is a new BWP-HARQ inactivity timer.