# US 2024/0205677 A1 · Authentication relay procedure for passive iot > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0205677 A1 - Document ID: US20240205677A1 - Status: Published application - Kind: A1 - Application number: 18/497,180 - Filed: 2023-10-30 - Published: 2024-06-20 - Earliest claimed: 2022-12-20 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Oana-Elena BARBU; Benny Vejlgaard; Paolo Baracca - Web page: https://patentgrep.com/patent/US20240205677A1 ## CPC - H04W 12/12: Detection or prevention of fraud - G16Y 10/35: Utilities, e.g. electricity, gas or water - G16Y 40/50: Safety; Security of things, users, data or systems - H04L 63/08: {for authentication of entities (cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32)} - H04L 63/1441: {Countermeasures against malicious traffic (countermeasures against attacks on cryptographic mechanisms H04L9/002)} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 12/06: Authentication - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G16Y: INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In a system, apparatus, method, and non-transitory computer readable medium related to an authentication relay procedure for passive Internet of Things (IoT) devices, a network node may be caused to receive a first transmission signal from at least one IoT device in response to a first activation signal transmitted by an activator node, determine an authentication test condition based on the received first transmission signal, and transmit a request to the activator node based on the determined authentication test condition, the request enabling the activator node to transmit a second activation signal generated based on the determined authentication test condition. ## Claims ### Claim 1 A network node, comprising: a memory storing computer readable instructions; and processing circuitry configured to execute the computer readable instructions to cause the network node to, receive a first transmission signal from at least one Internet of Things (IoT) device in response to a first activation signal transmitted by an activator node, determine an authentication test condition based on the received first transmission signal, and transmit a request to the activator node based on the determined authentication test condition, the request enabling the activator node to transmit a second activation signal generated based on the determined authentication test condition. ### Claim 2 (depends on 1) The network node of claim 1, wherein the network node is further caused to: set the authentication test condition to instruct the activator node to use a desired precoder to generate the second activation signal. ### Claim 3 (depends on 1) The network node of claim 1, wherein the network node is further caused to: estimate initial channel information of the received first transmission signal; and determine the authentication test condition based on at least the estimated initial channel information. ### Claim 4 (depends on 1) The network node of claim 1, wherein the network node is further caused to: set the authentication test condition to instruct the activator node to use a desired precoder configured using the estimated initial channel information. ### Claim 5 (depends on 1) The network node of claim 1, wherein the network node is further caused to: set the authentication test condition to instruct the activator node to use a desired precoder configured to generate the second activation signal, the generated second activation signal being a matched filter response to the estimated initial channel information. ### Claim 6 (depends on 1) The network node of claim 1, wherein the network node is further caused to: set the authentication test condition to instruct the activator node to use a desired precoder configured to generate the second activation signal, the generated second activation signal being a desired target channel associated with the estimated initial channel information. ### Claim 7 (depends on 1) The network node of claim 1, wherein the network node is further caused to: receive a second transmission signal from the at least one IoT device in response to the second activation signal transmitted by the activator node; and estimate second channel information of the second transmission signal. ### Claim 8 (depends on 1) The network node of claim 1, wherein the network node is further caused to: authenticate the at least one IoT device based on the authentication test condition and the estimated second channel information. ### Claim 9 (depends on 1) The network node of claim 1, wherein the network node is further caused to: forward the authentication test condition and the estimated second channel information to a network element; and receive results of an authentication of the at least one IoT device performed by the network element. ### Claim 10 A network node, comprising: a memory storing computer readable instructions; and processing circuitry configured to execute the computer readable instructions to cause the network node to, transmit a first activation signal to at least one Internet of Things (IoT) device, the first activation signal causing the at least one IoT device to transmit a first transmission signal, receive a request from a reader node, the request including an authentication test condition, and transmit a second activation signal to the at least one IoT device, the second activation signal generated based on the authentication test condition, the second activation signal causing the at least one IoT device to transmit a second transmission signal. ### Claim 11 (depends on 10) The network node of claim 10, wherein the authentication test condition includes an instruction to use a desired precoder to generate the second activation signal; and the network node is further caused to generate the second activation signal using the desired precoder. ### Claim 12 (depends on 10) The network node of claim 10, wherein the authentication test condition includes an instruction to use a desired precoder to generate the second activation signal; and the network node is further caused to generate the second activation signal using the desired precoder, the generated second activation signal having a target channel response selected based on an initial channel information of the first transmission signal estimated by the reader node. ### Claim 13 (depends on 10) The network node of claim 10, wherein the authentication test condition includes an instruction to use a desired precoder to generate the second activation signal; and the network node is further caused to generate the second activation signal using the desired precoder, the generated second activation signal being a matched filter response to an initial channel information of the first transmission signal estimated by the reader node. ### Claim 14 (depends on 10) The network node of claim 10, wherein the authentication test condition includes an instruction to use a desired precoder configured to generate the second activation signal; and the network node is further caused to generate the second activation signal using the desired precoder, the generated second activation signal being a desired target channel associated with an initial channel information of the first transmission signal estimated by the reader node. ### Claim 15 (depends on 10) The network node of claim 10, wherein the at least one IoT device is a plurality of IoT devices; and the network node is further caused to: generate a plurality of second activation signals corresponding to the plurality of IoT devices, the plurality of second activation signals precoded such that a plurality of second transmission signals transmitted in response to the plurality of second activation signals by the plurality of IoT devices are orthogonalized to each other. ### Claim 16 A method of operating a network node comprising: receiving a first transmission signal from at least one IoT device in response to a first activation signal transmitted by an activator node; determining an authentication test condition based on the received first transmission signal; and transmitting a request to the activator node based on the determined authentication test condition, the request enabling the activator node to transmit a second activation signal generated based on the determined authentication test condition. ### Claim 17 (depends on 16) The method of claim 16, further comprising: setting the authentication test condition to instruct the activator node to use a desired precoder to generate the second activation signal. ### Claim 18 (depends on 16) The method of claim 16, further comprising: estimating initial channel information of the received first transmission signal; and determining the authentication test condition based on at least the estimated initial channel information. ### Claim 19 (depends on 16) The method of claim 16, further comprising: setting the authentication test condition to instruct the activator node to use a desired precoder using the estimated initial channel information. ### Claim 20 (depends on 16) The method of claim 16, further comprising: receiving a second transmission signal from the at least one IoT device in response to the second activation signal transmitted by the activator node; estimating second channel information of the second transmission signal; and authenticating the at least one IoT device based on the estimated second channel information and the authentication test condition.