# US 2024/0205262 A1 · Preventing delivery of service attacks on a communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0205262 A1 - Document ID: US20240205262A1 - Status: Published application - Kind: A1 - Application number: 18/287,175 - Filed: 2021-04-14 - Published: 2024-06-20 - Earliest claimed: 2021-04-14 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget Lm Ericsson (Publ) - Inventors: Shah Nauman Nizami; Raya Altarabulsi; Magnus Almgren; Amel Mujkanovic - Web page: https://patentgrep.com/patent/US20240205262A1 ## CPC - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 63/1458: {Denial of Service} - H04L 1/0026: {Transmission of channel quality indication} - H04L 2463/142: Denial of service attacks against network infrastructure - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present disclosure relates to a control unit arrangement (6, 6′, 6″) that is adapted to acquire instructions relating to one or more certain predefined scheduling communication patterns for communication between a wireless communication node (2) and a served user terminal (3a, 3b, 3c) comprised in a wireless communication system (1), and to determine if the user terminal (3a, 3b, 3c) is scheduled according to any one of the predefined scheduling communication patterns for a number of times that exceeds a predetermined number of times. If that is the case, the control unit arrangement (6, 6′, 6″) is adapted to report the user terminal (3a, 3b, 3c) to a communication traffic handling function (4, 5) comprised in the wireless communication system (1). ## Claims ### Claim 1 A control unit arrangement comprising processing circuitry, memory and transceiver circuitry collectively configured to perform operations comprising: acquire instructions relating to one or more certain predefined scheduling communication patterns for communication between a wireless communication node and a served user terminal comprised in a wireless communication system, and to determine if the user terminal is scheduled according to any one of the predefined scheduling communication patterns for a number of times that exceeds a predetermined number of times, and if that is the case, comprising processing circuitry, memory and transceiver circuitry further configured to perform operations comprising: reporting the user terminal to a communication traffic handling function comprised in the wireless communication system. ### Claim 2 (depends on 1) The control unit arrangement according to claim 1, wherein a predefined scheduling communication pattern comprises that the number of re-transmissions in downlink, DL, from the node to the user terminal, has reached or falls below a predefined first maximum number of re-transmissions by a predefined number of times for a certain transmission. ### Claim 3 (depends on 2) The control unit arrangement according to claim 2, wherein the predefined number of times is 1 or 2. ### Claim 4 (depends on 2) The control unit arrangement according to claim 2, wherein the predefined scheduling communication pattern comprises that a channel quality indication, provided by the user terminal, exceeds a certain threshold value. ### Claim 5 (depends on 2) The control unit arrangement according to claim 2, wherein the number of re-transmissions is determined by means of a hybrid automatic repeat request, HARQ, response received from the user terminal. ### Claim 6 (depends on 2) The control unit arrangement according to claim 2, wherein a predefined scheduling communication pattern comprises that the number of re-transmissions in uplink, UL, from the user terminal to the node, has reached or falls below a predefined second maximum number of re-transmissions by a predefined number of times for a certain transmission. ### Claim 7 (depends on 6) The control unit arrangement according to claim 6, wherein the predefined number of times is 1 or 2. ### Claim 8 (depends on 6) The control unit arrangement according to claim 6, wherein the predefined scheduling communication pattern comprises that a signal to interference plus noise ratio, SINR, value calculated for said certain transmission exceeds a certain SINR threshold value. ### Claim 9 (depends on 6) The control unit arrangement according to claim 6, wherein the predefined scheduling communication pattern comprises that for each re-transmission, there is a user terminal data buffer status report, BSR, from the user terminal that exceeds a certain BSR threshold value. ### Claim at position 10 10-25. (canceled) ### Claim 26 A method in a wireless communication system, comprising: acquiring instructions relating to one or more certain predefined scheduling communication patterns for communication between a wireless communication node and a served user terminal in the wireless communication system, and determining if the served user terminal is scheduled according to any one of the predefined scheduling communication patterns for a number of times that exceeds a predetermined number of times, and if that is the case, the method comprises: reporting the user terminal to a communication traffic handling function in the wireless communication system. ### Claim 27 (depends on 26) The method according to claim 26, wherein the method comprises: receiving the reports at the communication traffic handling function; and discontinuing operation of the reported user terminal. ### Claim 28 (depends on 27) The method according to claim 27, wherein the discontinuation of operation is upheld for a certain time period. ### Claim 29 (depends on 27) The method according to claim 27, wherein the discontinuation of operation is permanent. ### Claim 30 (depends on 27) The method according to claim 27, wherein the discontinuation of operation is permanent if the operation of the user terminal previously has been discontinued during a certain time period for a predetermined number of times. ### Claim 31 (depends on 26) The method according to claim 26, wherein a predefined scheduling communication pattern comprises that the number of re-transmissions in downlink, DL, from the node to the user terminal, has reached or falls below a predefined first maximum number of re-transmissions by a predefined number of times for a certain transmission. ### Claim 32 (depends on 31) The method according to claim 31, wherein the predefined number of times is 1 or 2. ### Claim 33 (depends on 31) The method according to claim 31, wherein the predefined scheduling communication pattern comprises that a channel quality indication, provided by the user terminal, exceeds a certain threshold value. ### Claim at position 19 34-43. (canceled)