# US 12,114,354 B2 · Resource selection based on latency requirements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,354 B2 - Document ID: US12114354B2 - Status: Granted - Kind: B2 - Application number: 18/153,600 - Filed: 2023-01-12 - Published: 2023-05-18 - Granted: 2024-10-08 - Earliest claimed: 2017-02-13 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Ricardo Blasco Serrano; Stefano Sorrentino - Web page: https://patentgrep.com/patent/US12114354B2 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 1/0003: {by switching between different modulation schemes} - H04L 5/0082: {at predetermined intervals} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 28/0289: {Congestion control (load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and wireless device for determining a time interval, T2, for selecting a time-frequency resource are disclosed. According to one aspect, a method includes determining the time interval based on at least one parameter serving as a proxy indicative of a likelihood of collision. In some embodiments, at least one of the at least one parameter is a priority level indication, such that a higher priority transmission results in a lower value of T2. ## Claims ### Claim 1 A method for use in a wireless device, WD, for determining a second time, T2, for selecting a resource in a time interval, where T2>T1≥0, T1 is a first time, the method comprising: determining a minimum value of T2 based on a priority level indication; determining T2 considering the minimum value of T2; selecting the resource in the time interval; and transmitting data in the selected resource. ### Claim 2 (depends on 1) The method of claim 1, wherein the resource is a time-frequency resource. ### Claim 3 (depends on 2) The method of claim 2, wherein time-frequency resources in the time interval [n+T1, n+T2] are not selected with equal probability. ### Claim 4 (depends on 1) The method of claim 1, wherein the priority level indication is a proximity services per packet priority (PPPP) value. ### Claim 5 (depends on 1) The method of claim 1, wherein the priority level indication causes a higher priority transmission to result in a lower value of the minimum value of T2. ### Claim 6 (depends on 1) The method of claim 1, wherein the minimum value of T2 depends on which one pool of a plurality of pool of resources is to be employed, the selected resource being part of the one pool. ### Claim 7 (depends on 1) The method of claim 1, wherein determining the minimum value of T2 is based on at least one parameter serving as a proxy indicative of a likelihood of collision and comprises selecting the minimum value of T2 from a set of predetermined minimum T2 values. ### Claim 8 (depends on 7) The method of claim 7, wherein the at least one parameter is at least one taken from a group consisting of: a number of reserved subframes that causes T2 to be a fixed value minus the number of reserved subframes; and a number of unavailable subframes that causes T2=Tfixed,2−Nunavailable, where Tfixed,2 is a fixed value associated at least with the unavailable subframes and Nunavailable is the number of unavailable subframes in the time interval [n, n+Tfixed,2]. ### Claim 9 (depends on 7) The method of claim 7, wherein at least one of the at least one parameter is a packet size, such that the smaller the packet size the lower the minimum value of T2. ### Claim 10 (depends on 7) The method of claim 7, wherein the at least one parameter is at least one taken from a group consisting of: a type of transmission that causes the minimum value of T2 to be a first value for control information and to be a second, larger value for other types of information; a characteristic of a vehicle upon which the WD is one of mounted and incorporated, the characteristic being at least one of position, speed and type of vehicle; and a budget that causes a transmitter of the WD to be enabled to select resources for a plurality packets using a first value of the minimum value of T2 a certain number of times per second and using a second value of the minimum value of T2 to select resources for remaining packets. ### Claim 11 (depends on 7) The method of claim 7, wherein at least one of the at least one parameter is a congestion control indicator that, when congestion is low, causes the minimum value of T2 to be small, and, when congestion is high, causes the minimum value of T2 to be large. ### Claim 12 (depends on 1) The method of claim 1, further comprising setting the minimum value of T2 to support a desired latency. ### Claim 13 A wireless device, WD, configured to determine a second time, T2, for selecting a resource in a time interval, where T2>T1≥0, T1 is a first time, the WD comprising processing circuitry configured to: determine a minimum value of T2 based on a priority level indication; determine T2 considering the minimum value of T2; select the resource in the time interval; and transmit data in the selected resource. ### Claim 14 (depends on 13) The WD of claim 13, wherein the resource is a time-frequency resource. ### Claim 15 (depends on 14) The WD of claim 14, wherein time-frequency resources in the time interval [n+T1, n+T2] are not selected with equal probability. ### Claim 16 (depends on 13) The WD of claim 13, wherein the priority level indication is a proximity services per packet priority (PPPP) value. ### Claim 17 (depends on 13) The WD of claim 13, wherein the priority level indication causes a higher priority transmission to result in a lower value of the minimum value of T2. ### Claim 18 (depends on 13) The WD of claim 13, wherein the minimum value of T2 depends on which one pool of a plurality of pool of resources is to be employed, the selected resource being part of the one pool. ### Claim 19 (depends on 13) The WD of claim 13, wherein determining the minimum value of T2 is based on at least one parameter serving as a proxy indicative of a likelihood of collision and comprises selecting the minimum value of T2 from a set of predetermined minimum T2 values. ### Claim 20 (depends on 19) The WD of claim 19 wherein one or more of: the at least one parameter is at least one taken from a group consisting of: a number of reserved subframes that causes T2 to be a fixed value minus the number of reserved subframes; a number of unavailable subframes that causes T2=Tfixed,2−Nunavailable, where Tfixed,2 is a fixed value associated at least with the unavailable subframes and Nunavailable is the number of unavailable subframes in the time interval [n, n+Tfixed,2]; a type of transmission that causes the minimum value of T2 to be a first value for control information and to be a second, larger value for other types of information; and a characteristic of a vehicle upon which the WD is one of mounted and incorporated, the characteristic being at least one of position, speed and type of vehicle; and a budget that causes a transmitter of the WD to be enabled to select resources for a plurality packets using a first value of the minimum value of T2 a certain number of times per second and using a second a second value of the minimum value of T2 to select resources for remaining packets; at least one of the at least one parameter is a packet size, such that the smaller the packet size the lower the minimum value of T2; and at least one of the at least one parameter is a congestion control indicator that, when congestion is low, causes the minimum value of T2 to be small, and, when suggestion is high, causes the minimum value of T2 to be large. ### Claim 21 (depends on 13) The WD of claim 13, wherein the WD is one of incorporated as part of a vehicle or mounted on the vehicle. ### Claim 22 A vehicle, configured to determine a second time, T2, for selecting a resource in a time interval, where T2>T1≥0, T1 is a first time, the vehicle comprising processing circuitry configured to: determine a minimum value of T2 based on a priority level indication; determine T2 considering the minimum value of T2; select the resource in the time interval; and transmit data in the selected resource. ### Claim 23 A non-transitory computer storage medium storing an executable computer program that, when executed by a wireless device, performs a method for determining a second time, T2, for selecting a time-frequency resource in a time interval, where T2>T1≥0, T1 is a first time, the method comprising: determining a minimum value of T2 based on a priority level indication; determining T2 considering the minimum value of T2; selecting the resource in the time interval; and transmitting data in the selected resource.