# US 2021/0345401 A1 · Spatial reuse for wireless network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345401 A1 - Document ID: US20210345401A1 - Status: Published application - Kind: A1 - Application number: 17/270,800 - Filed: 2018-10-05 - Published: 2021-11-04 - Earliest claimed: 2018-10-05 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: David LOPEZ-PEREZ; Mika KASSLIN; Lorenzo GALATI GIORDANO; Adrian GARCIA RODRIGUEZ - Web page: https://patentgrep.com/patent/US20210345401A1 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 84/12: WLAN [Wireless Local Area Networks] - H04B 7/0617: {for beam forming} - 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 According to an example aspect of the present invention, there is provided a method, comprising: receiving from a first wireless device a first transmission comprising information on beamforming and/or null steering for a second transmission from the first wireless device, and controlling a third transmission from a second wireless device to a third wireless device during the second transmission on the basis of the information on beamforming and/or null steering. ## Claims ### Claim at position 1 -27. (canceled) ### Claim 28 An apparatus comprising at least one processor, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to: receive from a first wireless device a first transmission comprising information on beamforming and/or null steering for a second transmission from the first wireless device, and control a third transmission from a second wireless device to a third wireless device during the second transmission on the basis of the information on beamforming and/or null steering. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to: determine a duration of the second transmission on the basis of the first transmission, and determine during the determined duration if the second wireless device is allowed to transmit the third transmission on the basis of the information on beamforming and/or null steering. ### Claim 30 (depends on 28) The apparatus of claim 28, wherein the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to: in response to detecting the information on beamforming and/or null steering, measure by the second wireless device power received during the first transmission and/or a first period of the second transmission, and control the third transmission during the second transmission on the basis of the measured power. ### Claim 31 (depends on 28) The apparatus of claim 28, wherein the information on beamforming and/or null steering comprises parameters indicative of at least one target area or direction of at least one null radiation null during the second transmission and the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to: determine on the basis of the information on beamforming and/or null steering if the second wireless device is located in a target area or direction of the at least one target area or direction, and enable the third transmission during the second transmission in response to detecting the second wireless device located in the target area or direction. ### Claim 32 (depends on 28) The apparatus of claim 28, wherein the information on beamforming and/or null steering indicates number of beams and/or number of null radiation nulls during the second transmission and the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to enable the third transmission during the second transmission in response to the number of beams and/or the number of null radiation nulls exceeding a threshold value. ### Claim 33 (depends on 28) The apparatus of claim 28, wherein the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to adapt a signal detection threshold on the basis of the information on beamforming and/or null steering. ### Claim 34 (depends on 28) The apparatus of claim 28, wherein the first transmission comprises an omnidirectionally-transmitted preamble of a physical layer protocol data unit and the second transmission comprises a remaining portion of the physical layer protocol data unit. ### Claim 35 (depends on 28) The apparatus of claim 28, wherein the first wireless device is an access node of a first wireless network and the second wireless device is a station of a second wireless network, different from the first wireless network. ### Claim 36 (depends on 28) The apparatus of claim 28, wherein the first wireless device and/or the second wireless device is a station or an access point of a wireless local area network and the information on beamforming and/or null steering is included in a preamble field of physical layer convergence protocol data unit. ### Claim 37 An apparatus comprising at least one processor, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to: send, from a first wireless device to a second wireless device, a first transmission comprising information on beamforming and/or null steering for a second transmission from the first wireless device, for controlling a third transmission from the second wireless device to a third wireless device during the second transmission from the first wireless device. ### Claim 38 (depends on 37) The apparatus of claim 37, wherein the at least one memory and the computer program code is configured to, with the at least one processor, further cause the apparatus to indicate in the information on beamforming and/or null steering at least one of number of null radiation nulls, at least one target area of at least one null radiation null, and direction of at least one null radiation null during the second transmission. ### Claim 39 A method comprising: receiving from a first wireless device a first transmission comprising information on beamforming and/or null steering for a second transmission from the first wireless device, and controlling a third transmission from a second wireless device to a third wireless device during the second transmission on the basis of the information on beamforming and/or null steering. ### Claim 40 (depends on 39) The method of claim 39, further comprising: determining a duration of the second transmission on the basis of the first transmission, and determining during the determined duration if the second wireless device is allowed to transmit the third transmission on the basis of the information on beamforming and/or null steering. ### Claim 41 (depends on 39) The method of claim 39, further comprising: in response to detecting the information on beamforming and/or null steering, measuring by the second wireless device power received during the first transmission and/or a first period of the second transmission, and controlling the third transmission during the second transmission on the basis of the measured power. ### Claim 42 (depends on 39) The method of claim 39, wherein the information on beamforming and/or null steering comprises parameters indicative of at least one target area or direction of at least one null radiation null during the second transmission, the method further comprising: determining on the basis of the information on beamforming and/or null steering if the second wireless device is located in a target area or direction of the at least one target area or direction, and enabling the third transmission during the second transmission in response to detecting the second wireless device located in the target area or direction. ### Claim 43 (depends on 39) The method of claim 39, wherein the information on beamforming and/or null steering indicates number of beams and/or number of null radiation nulls during the second transmission and the third transmission is enabled during the second transmission in response to the number of beams and/or the number of null radiation nulls exceeding a threshold value. ### Claim 44 (depends on 39) The method of claim 39, further comprising adapting a signal detection threshold on the basis of the information on beamforming and/or null steering. ### Claim 45 (depends on 39) The method of claim 39, wherein the first transmission comprises an omnidirectionally-transmitted preamble of a physical layer protocol data unit and the second transmission comprises a remaining portion of the physical layer protocol data unit. ### Claim 46 (depends on 39) The method of claim 39, wherein the first wireless device is an access node of a first wireless network and the second wireless device is a station of a second wireless network, different from the first wireless network. ### Claim 47 (depends on 39) The method of claim 39, wherein the first wireless device and/or the second wireless device is a station or an access point of a wireless local area network and the information on beamforming and/or null steering is included in a preamble field of physical layer convergence protocol data unit.