# US 2021/0243702 A1 · Management server, communication device, method and recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243702 A1 - Document ID: US20210243702A1 - Status: Published application - Kind: A1 - Application number: 17/235,963 - Filed: 2021-04-21 - Published: 2021-08-05 - Earliest claimed: 2016-07-12 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Sho FURUICHI - Web page: https://patentgrep.com/patent/US20210243702A1 ## CPC - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 52/362: {Aspects of the step size} - H04W 52/146: {Uplink power control} - H04W 52/285: {taking into account the mobility of the user} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A mechanism which enables management of frequency resources while suppressing a calculation amount under an environment where location information of a communication device changes. A management server including: a creating unit to create list information; an acquiring unit to acquire a step size relating to transmission power setting of the communication device; a re-creation judging unit to judge whether or not to re-create the list information based on first location information when the list information has been created last time, second location information to be judged and the step size; and a notification unit to notify the communication device which uses the list information, of the re-created list information in a case where it is judged to re-create the list information and the list information created last time in a case where it is judged not to re-create the list information. ## Claims ### Claim 1 A management server comprising: a creating unit configured to create list information including one or more combinations of frequency information and transmission power information in accordance with location information of a communication device; an acquiring unit configured to acquire a step size relating to transmission power setting of the communication device; a re-creation judging unit configured to judge whether or not to re-create the list information on a basis of first location information when the list information has been created last time, second location information to be judged and the step size; and a notification unit configured to notify the communication device which uses the list information, of the re-created list information in a case where it is judged to re-create the list information and the list information created last time in a case where it is judged not to re-create the list information. ### Claim 2 (depends on 1) The management server according to claim 1, wherein the re-creation judging unit judges whether or not to re-create the list information on a basis of a result of comparison between a change width of the transmission power setting at the communication device calculated from location information of a reference point, the first location information and the second location information, and the step size. ### Claim 3 (depends on 2) The management server according to claim 2, wherein the re-creation judging unit judges whether or not to re-create the list information on a basis of a result of comparison between a difference of path losses calculated on a basis of location information of the reference point, the first location information and the second location information, and the step size. ### Claim 4 (depends on 3) The management server according to claim 3, wherein the re-creation judging unit judges not to re-create the list information in a case where an absolute value of the difference of the path losses is less than the step size. ### Claim 5 (depends on 3) The management server according to claim 3, wherein the re-creation judging unit judges to re-create the list information in a case where an absolute value of the difference of the path losses is equal to or greater than the step size. ### Claim 6 (depends on 2) The management server according to claim 2, wherein the reference point is a primary system of a frequency to be judged. ### Claim 7 (depends on 1) The management server according to claim 1, wherein the frequency information is information indicating a frequency available to the communication device, and the transmission power information is information indicating a maximum value of transmission power which is settable at the communication device. ### Claim 8 A communication device comprising: a notification unit configured to notify a management server of information indicating a step size relating to transmission power setting. ### Claim 9 (depends on 8) The communication device according to claim 8, further comprising: a communication control unit, wherein the notification unit notifies the management server of location information of the communication device, and the communication control unit performs the transmission power setting on a basis of list information including one or more combinations of frequency information and transmission power information, created by the management server in accordance with the location information. ### Claim 10 (depends on 8) The communication device according to claim 8, further comprising: a communication control unit configured to perform communication with another communication device which is wirelessly connected to the communication device on a basis of the transmission power setting, and relay communication between the other communication device and a network. ### Claim 11 A method comprising: creating list information including one or more combinations of frequency information and transmission power information in accordance with location information of a communication device; acquiring a step size relating to transmission power setting of the communication device; judging by a processor whether or not to re-create the list information on a basis of first location information when the list information has been created last time, second location information to be judged and the step size; and notifying the communication device which uses the list information, of the re-created list information in a case where it is judged to re-create the list information and the list information created last time in a case where it is judged not to re-create the list information.