# US 2013/0156019 A1 · Method and apparatus for unlicensed band operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156019 A1 - Document ID: US20130156019A1 - Status: Published application - Kind: A1 - Application number: 13/327,225 - Filed: 2011-12-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Renesas Mobile Corporation - Inventors: Tao CHEN - Web page: https://patentgrep.com/patent/US20130156019A1 ## CPC - H04W 72/1215: {for collaboration of different radio technologies} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method, apparatus and computer program product are provided in order to enable operation of both cellular and WLAN on a shared unlicensed band. In this regard, a method is provided that includes causing a primary transmission mode period of operation, a secondary transmission mode period of operation, and an idle mode period of operation on an unlicensed frequency band to be transmitted to a mobile terminal. The method further includes receiving an interfered ratio report from the mobile terminal. The method also includes causing the mobile terminal to be classified as at least one of a primary user or a secondary user based on the interfered ratio report. The method also includes causing the classification to be transmitted to the mobile terminal. ## Claims ### Claim 1 A method comprising: receiving an operation mode indication, wherein the operation mode indication comprises an indication of a primary transmission mode period of operation, a secondary transmission mode period of operation, and an idle transmission mode period of operation on an unlicensed frequency band; causing an interfered ratio report to be transmitted, wherein the interfered ratio report is calculated as a total number of interfered symbols over a sensing period; determining whether to operate as at least one of a primary user or a secondary user based on the interfered ratio report; and determining whether to operate during the primary transmission mode period of operation, the secondary transmission mode period of operation, and the idle transmission mode period of operation. ### Claim 2 (depends on 1) A method according to claim 1 further comprising: causing operation during the primary transmission mode period of operation, wherein the primary transmission mode period of operation enables the operation without need of interference coordination with another user of an unlicensed band; ### Claim 3 (depends on 1) A method according to claim 1 further comprising: causing operation in the secondary transmission mode period of operation; wherein the secondary transmission mode period of operation is configured to operate on predefined resources of the unlicensed frequency band. ### Claim 4 (depends on 1) A method according to claim 1 further comprising causing operation in the idle transmission mode period of operation. ### Claim 5 (depends on 1) A method according to claim 1, further comprising: causing, when in the primary transmission mode period of operation, a transition to the secondary transmission mode period of operation in an instance in which a primary mode transition timer expires; causing, when in the idle transmission mode period of operation, a transition to the primary transmission mode period of operation in an instance in which a primary mode transition timer expires and there is no activity detected on a wireless local area network; and causing, when in the secondary transmission mode period of operation, a transition to the idle transmission mode period of operation in an instance in which at least one of a quality of service is below a predetermined threshold or a packet loss is detected. ### Claim 6 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 at least: receive an operation mode indication, wherein the operation mode indication comprises an indication of a primary transmission mode period of operation, a secondary transmission mode period of operation, and an idle mode period of operation on an unlicensed frequency band; cause an interfered ratio report to be transmitted, wherein the interfered ratio report is calculated as a total number of interfered symbols over a sensing period; determine whether to operate as at least one of a primary user or a secondary user based on the interfered ratio report; and determine whether to operate during the primary transmission mode period of operation, the secondary transmission mode period of operation, and the idle mode period of operation. ### Claim 7 (depends on 6) An apparatus according to claim 6, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause operation during the primary transmission mode period of operation, wherein the primary transmission mode period of operation enables the operation without need of interference coordination with another user of an unlicensed band. ### Claim 8 (depends on 6) An apparatus according to claim 6, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause operation in the secondary transmission mode period of operation; wherein the secondary transmission mode period of operation is configured to operate on predefined resources of the unlicensed frequency band. ### Claim 9 (depends on 6) An apparatus according to claim 6, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to cause operation in the idle mode period of operation. ### Claim 10 (depends on 6) An apparatus according to claim 6, wherein a transition between the primary transmission mode period of operation, the secondary transmission mode period of operation, and the idle mode period of operation is controlled by a timer. ### Claim 11 (depends on 6) An apparatus according to claim 6, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause, when in the primary transmission mode period of operation, a transition to the secondary transmission mode period of operation in an instance in which a primary mode transition timer expires. ### Claim 12 (depends on 6) An apparatus according to claim 6, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause, when in the idle mode period of operation, a transition to the primary transmission mode period of operation in an instance in which a primary mode transition timer expires and there is no activity detected on a wireless local area network; and cause, when in the secondary transmission mode period of operation, a transition to the idle mode period of operation in an instance in which at least one of a quality of service is below a predetermined threshold or a packet loss is detected. ### Claim 13 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 at least: cause a primary transmission mode period of operation, a secondary transmission mode period of operation, and an idle mode period of operation on an unlicensed frequency band to be transmitted to a mobile terminal; receive an interfered ratio report from the mobile terminal, wherein the interfered ratio report is calculated as a total number of interfered symbols over a sensing period; and cause the mobile terminal to be classified as at least one of a primary user or a secondary user based on the interfered ratio report; and cause the classification to be transmitted to the mobile terminal, wherein the mobile terminal is configured to operate during the primary transmission mode period of operation, the secondary transmission mode period of operation, and the idle mode period of operation based on the classification. ### Claim 14 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause the mobile terminal to operate during the primary transmission mode period of operation, wherein the primary transmission mode period of operation enables the mobile terminal to operate normally without interference coordination with another device operating on an unlicensed band. ### Claim 15 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause the mobile terminal to operate in the secondary transmission mode period of operation, wherein the secondary transmission mode period of operation is configured to operate on predefined resources of the unlicensed frequency band. ### Claim 16 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: receive measurement information from the primary user, wherein primary user measurement information comprises at least one of block error rate information, interference sensing on a scheduled resource, or passive sensing on an idle resource; and receive measurement information from the secondary user, wherein the measurement information comprises interference sensing on the idle resource. ### Claim 17 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to causing a mobile terminal to operate in an idle transmission mode. ### Claim 18 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: cause a sensing threshold and an interfered ratio threshold to be transmitted to the mobile terminal, wherein the sensing threshold and the interfered ratio threshold enable the mobile terminal to determine whether it is the primary user or the secondary user. ### Claim 19 (depends on 13) An apparatus according to claim 13, wherein the primary user is configured to operate on the primary transmission mode period of operation and the secondary transmission mode period of operation and the secondary user is configured to operate on the primary transmission mode period of operation. ### Claim 20 (depends on 13) An apparatus according to claim 13, wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to: determine an activity level of a wireless local area network based on a time domain for the interfered ratio report; and derive periods of operation for the primary transmission mode period of operation, the secondary transmission mode period of operation, and the idle mode period of operation based on the activity level.