# US 9,519,327 B2 · Communication apparatus and control method therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,327 B2 - Document ID: US9519327B2 - Status: Granted - Kind: B2 - Application number: 14/044,002 - Filed: 2013-10-02 - Published: 2014-04-17 - Granted: 2016-12-13 - Earliest claimed: 2012-10-15 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Eiji Imao - Web page: https://patentgrep.com/patent/US9519327B2 ## CPC - G06F 1/3209: Monitoring remote activity, e.g. over telephone lines or network connections - G06F 1/3278: {Power saving in modem or I/O interface} - G06F 1/3296: by lowering the supply or operating voltage - G06F 1/3203: Power management, i.e. event-based initiation of a power-saving mode - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract There is provided a communication apparatus in which power consumption by wired connection is reduced in a standby state. An acquisition unit acquires information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a function of waiting in a power saving state in the wired connection. Based on the acquired information, a setting unit sets a communication speed with the partner apparatus. The function of waiting in the power saving state in the wired connection is, for example, LPI (Low Power Idle). ## Claims ### Claim 1 A communication apparatus comprising: an acquisition unit configured to acquire information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; a setting unit configured to set a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquisition unit; a determination unit configured to determine whether or not the partner apparatus has the predetermined function, in a case where the communication apparatus transits from the first state into a second state that requires more power consumption than the first state; and a resetting unit configured to execute a reset process of the communication speed with the partner apparatus, in a case where it is determined that the partner apparatus does not have the predetermined function, wherein the communication apparatus maintains, in the second state, the communication speed set by the setting unit in the first state without executing the reset process by the resetting unit, in a case where it is determined that the partner apparatus has the predetermined function. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the predetermined function is LPI (Low Power Idle). ### Claim 3 (depends on 2) The apparatus according to claim 2, further comprising a detection unit configured to detect a change in state of the wired connection with the partner apparatus, wherein when the detection unit detects the change in state, the setting unit sets the communication speed with the partner apparatus. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein when the detection unit detects the change in a case where the communication apparatus is in the first state and the predetermined function has been enabled, the setting unit sets the communication speed to a maximum speed at which communication with the partner apparatus is possible. ### Claim 5 (depends on 3) The apparatus according to claim 3, wherein when the detection unit detects the change in a case where the communication apparatus is in the first state and the predetermined function has been disabled, the setting unit sets the communication speed to a minimum speed at which communication with the partner apparatus is possible. ### Claim 6 A method of controlling a communication apparatus, comprising the steps of: acquiring information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; setting a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquisition unit; determining whether or not the partner apparatus has the predetermined function, in a case where the communication apparatus transits from the first state into a second state that requires more power consumption than the first state; and resetting a communication speed with the partner apparatus, in a case where it is determined that the partner apparatus does not have the predetermined function; and maintaining, in the second state, the communication speed set by the setting unit in the first state without executing the reset process by the resetting unit, in a case where it is determined that the partner apparatus has the predetermined function. ### Claim 7 A non-transitory computer-readable storage medium storing a program for causing a computer to perform a method of a communication apparatus, the method comprising: acquiring information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; setting a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquisition unit; determining whether or not the partner apparatus has the predetermined function, in a case where the communication apparatus transits from the first state into a second state that requires more power consumption than the first state; and resetting a communication speed with the partner apparatus, in a case where it is determined that the partner apparatus does not have the predetermined function; and maintaining, in the second state, the communication speed set by the setting unit in the first state without executing the reset process by the resetting unit, in a case where it is determined that the partner apparatus has the predetermined function. ### Claim 8 A communication apparatus comprising: an acquisition unit configured to acquire information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; a setting unit configured to set a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquisition unit; a determination unit configured to determine whether or not the partner apparatus has the predetermined function; and a resetting unit configured to execute a reset process of the communication speed with the partner apparatus when the communication apparatus transits from the first state into a second state that requires more power consumption than the first state, in a case where it is determined that the partner apparatus does not have the predetermined function, wherein the communication apparatus maintains, in the second state, the communication speed set by the setting unit in the first state without executing the reset process by the resetting unit when the communication apparatus transits from the first state into the second state, in a case where it is determined that the partner apparatus has the predetermined function. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein the predetermined function is LPI (Low Power Idle). ### Claim 10 (depends on 8) The apparatus according to claim 8, further comprising a detection unit configured to detect a change in state of the wired connection with the partner apparatus, wherein when the detection unit detects the change in state, the setting unit sets the communication speed with the partner apparatus. ### Claim 11 (depends on 8) The apparatus according to claim 8, wherein when the detection unit detects the change in a case where the communication apparatus is in the first state and the predetermined function has been enabled, the setting unit sets the communication speed to a maximum speed at which communication with the partner apparatus is possible. ### Claim 12 (depends on 8) The apparatus according to claim 8, wherein when the detection unit detects the change in a case where the communication apparatus is in the first state and the predetermined function has been disabled, the setting unit sets the communication speed to a minimum speed at which communication with the partner apparatus is possible. ### Claim 13 A communication method for a communication apparatus, the method comprising: acquiring information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; setting a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquiring; determining whether or not the partner apparatus has the predetermined function; and executing a reset process of the communication speed with the partner apparatus when the communication apparatus transits from the first state into a second state that requires more power consumption than the first state, in a case where it is determined that the partner apparatus does not have the predetermined function, wherein the communication apparatus maintains, in the second state, the communication speed set by the setting in the first state without executing the reset process when the communication apparatus transits from the first state into the second state, in a case where it is determined that the partner apparatus has the predetermined function. ### Claim 14 A non-transitory computer-readable storage medium storing a program for causing a computer to perform a method of a communication apparatus, the method comprising: acquiring information indicating whether a partner apparatus connected to the communication apparatus by wired connection has a predetermined function of waiting in a power saving state in the wired connection; setting a communication speed with the partner apparatus in a case where the communication apparatus is in a first state based on the information acquired by the acquiring; determining whether or not the partner apparatus has the predetermined function; and executing a reset process of the communication speed with the partner apparatus when the communication apparatus transits from the first state into a second state that requires more power consumption than the first state, in a case where it is determined that the partner apparatus does not have the predetermined function, wherein the communication apparatus maintains, in the second state, the communication speed set by the setting in the first state without executing the reset process when the communication apparatus transits from the first state into the second state, in a case where it is determined that the partner apparatus has the predetermined function.