# US 2013/0281143 A1 · Method and apparatus for interference-aware wireless communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0281143 A1 - Document ID: US20130281143A1 - Status: Published application - Kind: A1 - Application number: 13/822,046 - Filed: 2010-09-14 - Published: 2013-10-24 - Earliest claimed: 2010-09-14 - Assignees: Nokia Corporation - Inventors: Markus Nentwig; Pekka Jänis; Cássio Ribeiro; Chunyan Gao; Haiming Wang - Web page: https://patentgrep.com/patent/US20130281143A1 ## CPC - H04W 72/542: using measured or perceived quality - H04B 17/318: Received signal strength - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04B 17/102: {Power radiated at antenna} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 52/242: {taking into account path loss} - H04W 52/244: {Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/386: {centralized, e.g. when the radio network controller or equivalent takes part in the power control} - H04W 72/541: using the level of interference - 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 In accordance with an example embodiment of the present invention, a method comprises receiving at a controlling node an interference measurement report from a first node; determining from a transmission schedule a transmit activity by a second node during an interference measurement period associated with the interference measurement report; estimating a contributing interference from the transmit activity by the second node during the measurement period; and causing an adjustment to the contributing interference. ## Claims ### Claim at position 1 -36. (canceled) ### Claim 37 a method, comprising: receiving, at a controlling node, an interference measurement report from a first node; determining, from a transmission schedule, a transmit activity by a second node during an interference measurement period associated with the interference measurement report; estimating a contributing interference from the transmit activity by the second node during the measurement period; and causing an adjustment to the contributing interference. ### Claim 38 (depends on 37) The method of claim 37, wherein the determining the transmit activity further comprises determining whether the second node is transmitting during the interference measurement period. ### Claim 39 (depends on 37) The method of claim 37, wherein the determining the transmit activity further comprises determining a transmit energy emitted by the second node during the interference measurement period. ### Claim 40 (depends on 37) The method of claim 37, wherein the determining the transmit activity further comprises determining the interference measurement period from an earlier request for the interference measurement report or based on a first time offset t1 and a second time offset t2, relative to a time when the interference measurement report is received. ### Claim 41 (depends on 37) The method of claim 37, wherein the estimating the contributing interference comprises estimating a path loss to the first node on a radio resource by measuring a received signal strength of a report message, and comparing the received signal strength to a known transmit signal strength of the report message. ### Claim 42 (depends on 37) The method of claim 37, further comprising: determining, from a plurality of transmission schedules, a plurality of transmit activities by a plurality of controlled nodes; estimating the contributing interference from each of the plurality of the transmit activities; and causing an adjustment to the contributing interference based on each of the plurality of transmit activities. ### Claim 43 (depends on 42) The method of claim 42, wherein the estimating the contributing interference comprises obtaining a remaining interference by subtracting contributing interference caused by each of the plurality of the controlled nodes from the interference measurement report. ### Claim 44 (depends on 37) The method of claim 37, wherein the causing the adjustment to the contributing interference further comprises performing, upon determining that the contributing interference is a main contributor to the interference measurement report, at least one of: selecting a transmit power that does not exceed a maximum level of interference at the first node; and preventing a transmission from the second node on a resource reserved for the first node. ### Claim 45 (depends on 37) The method of claim 37, wherein the causing the adjustment to the contributing interference further comprises performing at least one of: determining a maximum tolerable level of interference; determining a maximum transmit power by scaling the maximum tolerable level of interference with a path loss estimate; choosing a second transmit power not exceeding the maximum transmit power; and configuring transmissions of the second node based on the chosen second transmit power. ### Claim 46 (depends on 45) The method of claim 45, wherein the causing the adjustment to the contributing interference further comprises choosing a transmit power based on a utility function that depends on an interference generated at multiple interfered nodes, and their respective background interference levels. ### Claim 47 (depends on 45) The method of claim 45, wherein the causing the adjustment to the contributing interference further comprises causing the second node to adjust its transmission power to reach an optimal trade-off between a gained throughput and a lost throughput using a utility function for downlink and uplink resources. ### Claim 48 (depends on 37) The method of claim 37, wherein the estimating the contributing interference comprises obtaining a remaining interference by subtracting the contributing interference caused by the second node from the interference measurement report. ### Claim 49 (depends on 37) The method of claim 37, wherein the second node and the controlling node are same node. ### Claim 50 An apparatus, comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform, at least, receiving an interference measurement report from a first node; determining from a transmission schedule a transmit activity by a second node during an interference measurement period associated with the interference measurement report; estimating a contributing interference from the transmit activity by the second node during the measurement period; and causing an adjustment to the contributing interference. ### Claim 51 (depends on 50) The apparatus of claim 50, wherein the apparatus is a controlling node and comprises one of an access point, a user equipment and a LTE eNode B, wherein the second node is a controlled node and comprises one of a user equipment, an access point and a fourth generation mobile station, and wherein the first node is an interfered node and comprises one of an access point and a user equipment. ### Claim 52 (depends on 50) The apparatus of claim 50, wherein the transmission schedule comprises at least one of an instruction from the apparatus to the second node to indicate when to transmit data, on what resource and at what time interval to transmit the data for an uplink transmission; a record including a permission from the apparatus to the second node for a transmission of data and an time interval associated with transmission; and a record including a grant for a frequency resource, a time period for a device-to-device (D2D) pair or cluster including the second node, and a transmission grant and a resource allocation instruction on how to allocate resource among the D2D pair or cluster. ### Claim 53 (depends on 50) The apparatus of claim 50, wherein the interference measurement period is determined from an earlier request for the interference measurement report. ### Claim 54 (depends on 50) The apparatus of claim 50, wherein the interference measurement period is marked by two time offsets t1, and t2 with the first time offset t1 marking a start of the interference measurement period and the second time offset t2 marking an end of the interference measurement period based on either predetermined constants or values encoded in the interference measurement report. ### Claim 55 (depends on 50) The apparatus of claim 50, wherein the transmission schedule comprises one of a one-bit binary value to indicate whether the second node contributed to the contributing interference; and a continuous or quantized value indicating an amount of the contributing interference of the second node. ### Claim 56 A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations, said operations comprising: receiving, at a controlling node, an interference measurement report from a first node; determining from a transmission schedule a transmit activity by a second node during an interference measurement period associated with the interference measurement report; estimating a contributing interference from the transmit activity by the second node during the measurement period; and causing an adjustment to the contributing interference.