# US 2025/0159710 A1 · Sidelink resource reservation in a shared band > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0159710 A1 - Document ID: US20250159710A1 - Status: Published application - Kind: A1 - Application number: 18/839,919 - Filed: 2022-04-29 - Published: 2025-05-15 - Earliest claimed: 2022-04-29 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Yisheng XUE; Xiaoxia ZHANG; Chih-Hao LIU; Jing SUN; Siyi CHEN; Giovanni CHISCI; Arumugam CHENDAMARAI KANNAN - Web page: https://patentgrep.com/patent/US20250159710A1 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/535: {based on resource usage policies} - H04W 72/40: Resource management for direct mode communication, e.g. D2D or sidelink - H04W 72/542: using measured or perceived quality - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods, systems, and devices for wireless communication are described to support determining, at one or more sidelink user equipments (UEs), a competition level associated with another radio access technology (RAT) sharing a frequency band with the one or more sidelink UEs. A UE may determine a competition level from another RAT and may reserve resources in a sidelink resource pool based on the based on the determined competition level. For example, the UE may determine a signal strength associated with the other RAT, or may determine a ratio of failed LBT procedures, or both, based on monitoring one or more resources of the sidelink resource pool. Based on the determined competition level, the UE may determine a number of resources to reserve, or a reservation reliability, or both. The UE may transmit a resource reservation indicating the number of reserved resources, the reservation reliability, or both. ## Claims ### Claim 1 A method for wireless communication of a user equipment (UE) operating using a first radio access technology, comprising: identifying a sidelink resource pool of a shared resource band and a parameter of a competition level metric for measuring communication activity in the shared resource band, the shared resource band associated with communication by the first radio access technology and a second radio access technology that differs from the first radio access technology; monitoring, in accordance with the parameter of the competition level metric, at least one resource of the sidelink resource pool to determine the competition level metric for the shared resource band; and transmitting one or more reservations for reserving one or more resources of the sidelink resource pool based at least on part on the competition level metric. ### Claim 2 (depends on 1) The method of claim 1, wherein identifying the sidelink resource pool and the parameter of the competition level metric further comprises: receiving control signaling that indicates the sidelink resource pool and the parameter of the competition level metric. ### Claim 3 (depends on 1) The method of claim 1, further comprising: selecting a number of reservations to send based at least in part on the competition level metric, wherein transmitting the one or more reservations comprises transmitting one or more reservations for reserving the one or more resources of the sidelink resource pool in accordance with the number of reservations. ### Claim 4 (depends on 3) The method of claim 3, further comprising: mapping the competition level metric to the number of reservations from a plurality of different numbers of resource reservations, wherein selecting the number of reservations is based at least in part the mapping. ### Claim 5 (depends on 1) The method of claim 1, wherein transmitting the one or more reservations comprises: transmitting at least one of the one or more reservations that comprises a reservation reliability indicator that is based at least in part on the competition level metric. ### Claim 6 (depends on 5) The method of claim 5, further comprising: mapping the competition level metric to the reservation reliability indicator from a set of reservation reliability indicators, wherein the reservation reliability indicator is based at least in part on the mapping. ### Claim 7 (depends on 5) The method of claim 5, wherein the reservation reliability indicator is associated with resource selection within the sidelink resource pool by one or more other UEs. ### Claim 8 (depends on 1) The method of claim 1, further comprising: mapping the competition level metric to a resource reservation restriction of a plurality of resource reservation restrictions, wherein transmitting the one or more reservations for reserving the one or more resources of the sidelink resource pool is based at least in part on the resource reservation restriction. ### Claim 9 (depends on 1) The method of claim 1, further comprising: determining a signal strength associated with the second radio access technology at one or more measurement periods associated with the sidelink resource pool, wherein the parameter of the competition level metric indicates that the competition level metric comprises the signal strength. ### Claim 10 (depends on 9) The method of claim 9, wherein each of the one or more measurement periods comprises a respective gap symbol of a respective sidelink slot, the respective gap symbol other than symbols used for sidelink transmissions by the first radio access technology. ### Claim 11 (depends on 9) The method of claim 9, wherein each of the one or more measurement periods comprises a respective sidelink slot configured for measurement of the signal strength, the respective sidelink slot other than slots used for sidelink transmissions by the first radio access technology. ### Claim 12 (depends on 9) The method of claim 9, further comprising: determining a second signal strength associated with the second radio access technology over a first slot other than a slot in which sidelink control information is decoded. ### Claim 13 (depends on 1) The method of claim 1, further comprising: determining a ratio of failed clear channel assessment procedures within the sidelink resource pool of the shared resource band over a time period, wherein the parameter of the competition level metric indicates that the competition level metric comprises the ratio. ### Claim 14 (depends on 13) The method of claim 13, wherein the ratio of failed clear channel assessment procedures is based at least in part on one or more clear channel assessment procedures other than clear channel assessment procedures performed for sidelink resources selected for communication by the UE. ### Claim 15 (depends on 13) The method of claim 13, wherein the ratio of failed clear channel assessment procedures is associated with clear channel assessment procedures performed for a channel access priority class corresponding to the sidelink resource pool. ### Claim 16 (depends on 13) The method of claim 13, further comprising: determining whether a clear channel assessment level associated with the second radio access technology satisfies a threshold at each of a set of measurement periods, wherein the ratio of failed clear channel assessment procedures is based at least in part on clear channel assessment procedures associated with one or more measurement periods of the set of measurement periods in which the threshold is satisfied. ### Claim 17 (depends on 16) The method of claim 16, wherein each of the set of measurement periods comprises a respective gap symbol of a respective sidelink slot, the respective gap symbol other than symbols used for sidelink transmissions. ### Claim 18 (depends on 16) The method of claim 16, wherein each of the set of measurement periods comprises a respective sidelink slot configured for measurement of the clear channel assessment level associated with the second radio access technology, the respective sidelink slot other than slots used for sidelink transmissions. ### Claim 19 (depends on 16) The method of claim 16, further comprising: determining whether a clear channel assessment level associated with the second radio access technology satisfies a threshold over a first slot other than a slot in which sidelink control information is decoded, wherein the ratio of failed clear channel assessment procedures is based at least in part on a clear channel assessment procedure associated with the first slot in which the threshold is satisfied. ### Claim 20 A method for wireless communication of a first user equipment (UE) operating using a first radio access technology, comprising: identifying a sidelink resource pool of a shared resource band and a parameter of a competition level metric for measuring communication activity in the shared resource band, the shared resource band associated with communication by the first radio access technology and a second radio access technology that differs from the first radio access technology; and receiving, from a second UE, an indication of one or more reservations for reserving one or more resources of the sidelink resource pool, the one or more reservations indicative of the competition level metric for the second UE in the shared resource band. ### Claim 21 (depends on 20) The method of claim 20, wherein identifying the sidelink resource pool and the parameter of the competition level metric further comprises: receiving control signaling that indicates the sidelink resource pool and the parameter of the competition level metric. ### Claim 22 (depends on 20) The method of claim 20, wherein a number of the one or more reservations is associated with the competition level metric for the second UE. ### Claim 23 (depends on 22) The method of claim 22, wherein the number of the one or more reservations is based at least in part a mapping between the competition level metric and the number of the one or more reservations. ### Claim 24 (depends on 20) The method of claim 20, wherein receiving the one or more reservations comprises: receiving at least one of the one or more reservations that comprises a reservation reliability indicator that is based at least in part on the competition level metric. ### Claim 25 (depends on 24) The method of claim 24, wherein the reservation reliability indicator is based at least in part a mapping between the competition level metric and the reservation reliability indicator. ### Claim 26 (depends on 24) The method of claim 24, further comprising: selecting one or more second resources within the sidelink resource pool based at least in part on the reservation reliability indicator. ### Claim 27 (depends on 20) The method of claim 20, wherein the parameter of the competition level metric indicates that the competition level metric comprises a signal strength associated with the second radio access technology measured at one or more measurement periods associated with the sidelink resource pool. ### Claim 28 (depends on 20) The method of claim 20, wherein the parameter of the competition level metric indicates that the competition level metric comprises a ratio of failed clear channel assessment procedures within the sidelink resource pool of the shared resource band over a time period. ### Claim 29 An apparatus for wireless communication of a user equipment (UE) operating using a first radio access technology, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: identify a sidelink resource pool of a shared resource band and a parameter of a competition level metric for measuring communication activity in the shared resource band, the shared resource band associated with communication by the first radio access technology and a second radio access technology that differs from the first radio access technology; monitor, in accordance with the parameter of the competition level metric, at least one resource of the sidelink resource pool to determine the competition level metric for the shared resource band; and transmit one or more reservations for reserving one or more resources of the sidelink resource pool based at least on part on the competition level metric. ### Claim 30 An apparatus for wireless communication of a first user equipment (UE) operating using a first radio access technology, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: identify a sidelink resource pool of a shared resource band and a parameter of a competition level metric for measuring communication activity in the shared resource band, the shared resource band associated with communication by the first radio access technology and a second radio access technology that differs from the first radio access technology; and receive, from a second UE, an indication of one or more reservations for reserving one or more resources of the sidelink resource pool, the one or more reservations indicative of the competition level metric for the second UE in the shared resource band.