# US 10,484,882 B2 · Radio resource management in wireless communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,882 B2 - Document ID: US10484882B2 - Status: Granted - Kind: B2 - Application number: 15/760,747 - Filed: 2017-11-22 - Published: 2019-08-22 - Granted: 2019-11-19 - Earliest claimed: 2017-11-22 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Johan Torsner; Jani-Pekka Kainulainen; Anna Larmo; Osman Nuri Can Yilmaz - Web page: https://patentgrep.com/patent/US10484882B2 ## CPC - H04W 16/22: Traffic simulation tools or models - G01S 5/16: using electromagnetic waves other than radio waves - G06T 7/20: Analysis of motion (motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51) - G06T 17/05: Geographic models - H04B 7/088: {using beam selection} - H04L 5/0023: {Time-frequency-space} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0069: {Allocation based on distance or geographical location} - H04L 5/0085: {when channel conditions change} - H04L 5/0096: {Indication of changes in allocation} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 36/0085: {Hand-off measurements} - H04W 36/085: {involving beams of access points} - G06T 2207/10032: Satellite or aerial image; Remote sensing - G06T 2207/30232: Surveillance - H04B 7/0617: {for beam forming} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04W 16/28: using beam steering - H04W 36/0088: {Scheduling hand-off measurements} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The proposed technology generally relates to radio resource management in wireless communication systems, which operate based on directive beams for serving one or more wireless user devices (120). A basic idea is to process image information obtained from one or more image sensors (115) to predict a change in radio propagation characteristics between a network node (110) of the wireless communication system and a user device (120), and to control a mobility reference signal for at least one directive beam in the wireless communication system and/or configure measurements of the mobility reference signal and/or configure reporting and/or processing of measurement results from measurements of the mobility reference signal, based on the predicted change in radio propagation characteristics. ## Claims ### Claim 1 A method for performing radio resource management in a wireless communication system adapted to use directive beams for serving at least one user device, wherein the method comprises: obtaining image information from at least one image sensor monitoring at least part of a radio coverage area that is covered by a plurality of directive beams provided by at least one network node of the wireless communication system; processing the obtained image information to predict a change in radio propagation characteristics that affects one of the directive beams that serves a user device; based on the change in radio propagation characteristics predicted from the obtained image information, performing one or more of the following operations with respect to at least one of the directive beams selected based on the obtained image information: controlling transmission of mobility reference signals within the at least one directive beam; configuring the user device to perform measurements of mobility reference signals transmitted within the at least one directive beam; and configuring reporting and/or processing of measurements of mobility reference signals transmitted within the at least one directive beam. ### Claim 2 (depends on 1) The method of claim 1, wherein processing the obtained image information to predict a change in radio propagation characteristics comprises estimating relative movement between the user device and at least one obstacle in the radio coverage area and/or relative movement between the user device and the network node and predicting the change in radio propagation characteristics based on the estimated relative movement. ### Claim 3 (depends on 1) The method of claim 1, wherein controlling transmission of a mobility reference signal comprises at least one of: turning the mobility reference signal on and/or off; and configuring transmission of the mobility reference signal. ### Claim 4 (depends on 1) The method of claim 1, wherein configuring the user device to perform measurements of the mobility reference signal comprises configuring the measurements in at least one of frequency and time. ### Claim 5 (depends on 1) The method of claim 1, wherein configuring reporting and/or processing of measurements comprises configuring at least one of: reporting thresholds; measurement thresholds; and timers. ### Claim 6 (depends on 1) The method of claim 1, wherein the image information is obtained from multiple image sensors monitoring at least part of a radio coverage area of the wireless communication system. ### Claim 7 (depends on 6) The method of claim 6, wherein processing the obtained image information to predict a change in radio propagation characteristics comprises: dynamically producing an image-based geospatial model of the environment related to the radio coverage area or at least part thereof based on the image information obtained from the multiple image sensors; producing information related to radio resource management associated with the radio coverage area or at least part thereof; and processing information from the geospatial model of the environment and the information related to radio resource management to predict the change in radio propagation characteristics. ### Claim 8 (depends on 7) The method of claim 7, wherein the information related to radio resource management is produced as a layer of radio resource management related information on top of the geospatial model of the environment. ### Claim 9 (depends on 1) The method of claim 1, wherein performing the one or more operations, based on the predicted change in radio propagation characteristics, comprises generating control information, based on the predicted change in radio propagation characteristics, usable for performing the one or more operations. ### Claim 10 (depends on 9) The method of claim 9, further comprising transferring the generated control information to at least one of the network node and the user device. ### Claim 11 (depends on 1) The method of claim 1, wherein the at least one image sensors are: arranged in connection with at least one network node of the wireless communication system; and/or integrated with the at least one network node. ### Claim 12 (depends on 1) The method of claim 1, wherein the method is performed by a network unit associated with the wireless communication system. ### Claim 13 A system for radio resource management in a wireless communication system adapted to use directive beams for serving at least one user device, the system for radio resource management comprising: at least one processor; and at least one memory storing computer-executable instructions that, when executed by the at least one processor, configure the system to: obtain image information from at least one image sensor monitoring at least part of a radio coverage area that is covered by a plurality of directive beams provided by at least one network node of the wireless communication system; process the obtained image information to predict a change in radio propagation characteristics that affects one of the directive beams that serves a user device; based on the change in radio propagation characteristics predicted from the obtained image information, perform one or more of the following operations with respect to at least one of the directive beams selected based on the obtained image information: control transmission of mobility reference signals within the at least one directive beam; configure the user device to perform measurements of mobility reference signals transmitted within the at least one directive beam; and configure reporting and/or processing of measurements of mobility reference signals transmitted within the at least one directive beam. ### Claim 14 (depends on 13) The system of claim 13, wherein execution of the instructions further configures the system to process the obtained image information to predict a change in radio propagation characteristics based on estimating relative movement between the user device and at least one obstacle in the radio coverage area and/or relative movement between the user device and the network node and predicting the change in radio propagation characteristics based on the estimated relative movement. ### Claim 15 (depends on 13) The system of claim 13, wherein execution of the instructions further configures the system to control transmission of a mobility reference signal by at least one of: turning the mobility reference signal on and/or off; and configuring transmission of the mobility reference signal. ### Claim 16 (depends on 13) The system of any claim 13, wherein execution of the instructions further configures the system to configure the user device to perform measurements of the mobility reference signal in at least one of frequency and time. ### Claim 17 (depends on 13) The system of claim 13, wherein execution of the instructions further configures the system to configure reporting and/or processing of measurements by configuring at least one of: reporting thresholds; measurement thresholds; and timers. ### Claim 18 (depends on 13) The system of claim 13, wherein execution of the instructions further configures the system to obtain the image information from multiple image sensors monitoring at least part of a radio coverage area of the wireless communication system. ### Claim 19 (depends on 18) The system of claim 18, wherein execution of the instructions further configures the system to: dynamically produce an image-based geospatial model of the environment related to the radio coverage area or at least part thereof based on the image information obtained from the multiple image sensors; produce information related to radio resource management associated with the radio coverage area or at least part thereof; and process information from the geospatial model of the environment and the information related to radio resource management to predict the change in radio propagation characteristics. ### Claim 20 (depends on 19) The system of claim 19, wherein execution of the instructions further configures the system to produce the information related to radio resource management as a layer of radio resource management related information on top of the geospatial model of the environment. ### Claim 21 (depends on 13) The system of claim 13, wherein execution of the instructions further configures the system generate, based on the predicted change in radio propagation characteristics, control information usable for performing the one or more operations. ### Claim 22 (depends on 21) The system of claim 21, wherein execution of the instructions further configures the system to transfer the generated control information to at least one of the network node and the user device. ### Claim 23 (depends on 13) The system of claim 13, wherein the at least one image sensors are: arranged in connection with at least one network node of the wireless communication system; and/or integrated with the at least one network node. ### Claim 24 (depends on 13) A network unit comprising a system for radio resource management according to claim 13. ### Claim 25 (depends on 24) The network unit of claim 24, wherein the network unit is one of a radio access network node and a cloud-based network device. ### Claim 26 A radio resource management controller for a wireless communication system adapted to use directive beams for serving at least one user device, the controller comprising: at least one processor; and at least one memory storing computer-executable instructions that, when executed by the at least one processor, configure the controller to perform, based on image information obtained from at least one image sensor monitoring at least part of a radio coverage area that is covered by a plurality of directive beams provided by at least one network node of the wireless communication system, at least one of the following operations with respect to at least one of the directive beams selected based on the obtained image information: control transmission of mobility reference signals within the at least one directive beam; configure a user device to perform measurements of mobility reference signals transmitted within the at least one directive beam; and configure reporting and/or processing of measurements of mobility reference signals transmitted within the at least one directive beam. ### Claim 27 (depends on 26) A network unit comprising a radio resource management controller of claim 26. ### Claim 28 A non-transitory, computer-readable medium storing computer-executable instructions that, when executed by at least one processor comprising a wireless communication system adapted to use directive beams for serving at least one user device, configures the at least one processor to: obtain image information from at least one image sensor monitoring at least part of a radio coverage area that is covered by a plurality of directive beams provided by at least one network node of the wireless communication system; process the obtained image information to predict a change in radio propagation characteristics that affects one of the directive beams that serves a user device; based on the change in radio propagation characteristics predicted from the obtained image information, generate control information usable for performing one or more of the following operations with respect to at least one of the directive beams selected based on the obtained image information: controlling transmission of mobility reference signals within the at least one directive beam; configuring the user device to perform measurements of mobility reference signals transmitted within the at least one directive beam; and configuring reporting and/or processing of measurements of mobility reference signals transmitted within the at least one directive beam.