# US 12,120,554 B2 · Techniques for dynamic time duplex division with reservation signal and contention > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,554 B2 - Document ID: US12120554B2 - Status: Granted - Kind: B2 - Application number: 17/506,384 - Filed: 2021-10-20 - Published: 2023-04-20 - Granted: 2024-10-15 - Earliest claimed: 2021-10-20 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing Sun; Chih-Hao Liu; Yisheng Xue; Xiaoxia Zhang - Web page: https://patentgrep.com/patent/US12120554B2 ## CPC - H04W 28/26: Resource reservation - H04B 7/2656: {for structure of frame, burst} - H04W 72/20: Control channels or signalling for resource management - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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) - H04B: TRANSMISSION ## Abstract Techniques for dynamic time duplex division (TDD) with reservation signal and contention may include a first network node configured to select a first resource to reserve for use of a downlink (DL) transmission or an uplink (UL) transmission. The first network node may also be configured to transmit, to a second network node, a reservation signal on a reservation signal resource to announce that the first resource is reserved for use of the DL transmission or the UL transmission by the first network node. The reservation signal resource may be associated with the first resource. ## Claims ### Claim 1 A method of wireless communication by a first network node, comprising: selecting a first resource to reserve for use of a downlink (DL) transmission or an uplink (UL) transmission; and transmitting, to a second network node, a reservation signal on a reservation signal resource to announce that the first resource is reserved for use of the DL transmission or the UL transmission by the first network node, wherein the reservation signal resource is associated with the first resource and includes a system frame number (SFN) to indicate the DL transmission or the UL transmission. ### Claim 2 (depends on 1) The method of claim 1, wherein the reservation signal resource includes a transmission resource and a reception resource that are associated with the first resource. ### Claim 3 (depends on 2) The method of claim 2, further comprising: receiving a configuration signal indicating that the transmission resource or the reception resource is associated with the first resource. ### Claim 4 (depends on 2) The method of claim 2, wherein the transmission resource and the reception resource are in a same time domain but are separate resources. ### Claim 5 (depends on 2) The method of claim 2, wherein the first network node is a base station and the second network node is a user equipment (UE), and wherein the method further comprises: transmitting the reservation signal on the transmission resource for the DL transmission, or on the reception resource for the UL transmission; and monitoring the reception resource for the DL transmission or the transmission resource for the UL transmission to determine a reservation of the first resource by another base station. ### Claim 6 (depends on 5) The method of claim 5, further comprising: transmitting, to the UE, an indication of the DL transmission by the base station to inform the UE to transmit on the reception resource and monitor the transmission resource, or an indication of the UL transmission by the base station to inform the UE to transmit on the transmission resource and monitor the reception resource. ### Claim 7 (depends on 2) The method of claim 2, wherein the first network node is a user equipment (UE) and the second network node is a base station, and wherein the method further comprises: transmitting the reservation signal on the reception resource for the DL transmission, or on the transmission resource for the UL transmission; and monitoring the transmission resource for the DL transmission or the reception resource for the UL transmission to determine a reservation of the first resource by another UE. ### Claim 8 (depends on 1) The method of claim 1, further comprising: monitoring the reservation signal resource to determine a priority of a second reservation signal from another node, wherein use of the first resource by the first network node is in response to a priority of the reservation signal being greater than the priority of the second reservation signal. ### Claim 9 (depends on 8) The method of claim 8, wherein the priority of the reservation signal and the priority of the second reservation signal are based on whether the first resource is being used for the DL transmission or the UL transmission. ### Claim 10 (depends on 9) The method of claim 9, wherein the priority of the second reservation signal is indicated in the second reservation signal. ### Claim 11 A first network node, comprising: a memory storing instructions; and one or more processors coupled with the memory and configured to execute the instructions to: select a first resource to reserve for use of a downlink (DL) transmission or an uplink (UL) transmission; and transmit, to a second network node, a reservation signal on a reservation signal resource to announce that the first resource is reserved for use of the DL transmission or the UL transmission by the first network node, wherein the reservation signal resource is associated with the first resource and includes a system frame number (SFN) to indicate the DL transmission or the UL transmission. ### Claim 12 (depends on 11) The first network node of claim 11, wherein the reservation signal resource includes a transmission resource and a reception resource that are associated with the first resource. ### Claim 13 (depends on 12) The first network node of claim 12, wherein the one or more processors are further configured to execute the instructions to: receive a configuration signal indicating that the transmission resource or the reception resource is associated with the first resource. ### Claim 14 (depends on 12) The first network node of claim 12, wherein the transmission resource and the reception resource are in a same time domain but are separate resources. ### Claim 15 (depends on 12) The first network node of claim 12, wherein the first network node is a base station and the second network node is a user equipment (UE), and wherein the one or more processors are further configured to execute the instructions to: transmit the reservation signal on the transmission resource for the DL transmission, or on the reception resource for the UL transmission; and monitor the reception resource for the DL transmission or the transmission resource for the UL transmission to determine a reservation of the first resource by another base station. ### Claim 16 (depends on 15) The first network node of claim 15, wherein the one or more processors are further configured to execute the instructions to: transmit, to the UE, an indication of the DL transmission by the base station to inform the UE to transmit on the reception resource and monitor the transmission resource, or an indication of the UL transmission by the base station to inform the UE to transmit on the transmission resource and monitor the reception resource. ### Claim 17 (depends on 12) The first network node of claim 12, wherein the first network node is a user equipment (UE) and the second network node is a base station, and wherein the one or more processors are further configured to execute the instructions to: transmit the reservation signal on the reception resource for the DL transmission, or on the transmission resource for the UL transmission; and monitor the transmission resource for the DL transmission or the reception resource for the UL transmission to determine a reservation of the first resource by another UE. ### Claim 18 (depends on 11) The first network node of claim 11, wherein the one or more processors are further configured to execute the instructions to: monitor the reservation signal resource to determine a priority of a second reservation signal from another node, wherein use of the first resource by the first network node is in response to a priority of the reservation signal being greater than the priority of the second reservation signal. ### Claim 19 (depends on 18) The first network node of claim 18, wherein the priority of the reservation signal and the priority of the second reservation signal are based on whether the first resource is being used for the DL transmission or the UL transmission. ### Claim 20 (depends on 18) The first network node of claim 18, wherein the priority of the second reservation signal is indicated in the second reservation signal. ### Claim 21 A non-transitory computer-readable medium storing computer-executable code for a first network node, the computer-readable medium comprising code to: select a first resource to reserve for use of a downlink (DL) transmission or an uplink (UL) transmission; and transmit, to a second network node, a reservation signal on a reservation signal resource to announce that the first resource is reserved for use of the DL transmission or the UL transmission by the first network node, wherein the reservation signal resource is associated with the first resource and includes a system frame number (SFN) to indicate the DL transmission or the UL transmission. ### Claim 22 (depends on 21) The non-transitory computer-readable medium of claim 21, wherein the reservation signal resource includes a transmission resource and a reception resource that are associated with the first resource. ### Claim 23 (depends on 22) The non-transitory computer-readable medium of claim 22, further comprising code to: receive a configuration signal indicating that the transmission resource or the reception resource is associated with the first resource. ### Claim 24 (depends on 22) The non-transitory computer-readable medium of claim 22, wherein the transmission resource and the reception resource are in a same time domain but are separate resources. ### Claim 25 (depends on 22) The non-transitory computer-readable medium of claim 22, wherein the first network node is a base station and the second network node is a user equipment (UE), and wherein the computer-readable medium further comprises code to: transmit the reservation signal on the transmission resource for the DL transmission, or on the reception resource for the UL transmission; and monitor the reception resource for the DL transmission or the transmission resource for the UL transmission to determine a reservation of the first resource by another base station. ### Claim 26 (depends on 25) The non-transitory computer-readable medium of claim 25, further comprising code to: transmit, to the UE, an indication of the DL transmission by the base station to inform the UE to transmit on the reception resource and monitor the transmission resource, or an indication of the UL transmission by the base station to inform the UE to transmit on the transmission resource and monitor the reception resource. ### Claim 27 (depends on 22) The non-transitory computer-readable medium of claim 22, wherein the first network node is a user equipment (UE) and the second network node is a base station, and wherein the computer-readable medium further comprises code to: transmit the reservation signal on the reception resource for the DL transmission, or on the transmission resource for the UL transmission; and monitor the transmission resource for the DL transmission or the reception resource for the UL transmission to determine a reservation of the first resource by another UE.