# US 10,873,982 B2 · Terminal apparatus, control method, and integrated circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,982 B2 - Document ID: US10873982B2 - Status: Granted - Kind: B2 - Application number: 15/328,567 - Filed: 2015-07-03 - Published: 2017-08-03 - Granted: 2020-12-22 - Earliest claimed: 2014-07-31 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Hidekazu Tsuboi; Katsunari Uemura - Web page: https://patentgrep.com/patent/US10873982B2 ## CPC - H04W 76/14: Direct-mode setup - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 76/20: Manipulation of established connections - H04W 76/25: Maintenance of established connections - H04W 92/18: between terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a technique related to a terminal apparatus, a control method, and an integrated circuit that are able to efficiently perform connection control when performing device-to-device communication. At a time of re-establishing radio resource control connection, at least on a basis of whether or not device-to-device data communication is able to be performed in a selected cell and whether or not there is data of the device-to-device data communication in the terminal apparatus, the terminal apparatus selects information about the device-to-device data communication, which is to be notified to the base station apparatus. ## Claims ### Claim 1 A terminal apparatus that performs data communication with a base station apparatus and device-to-device data communication that is direct data communication between terminal apparatuses with use of a radio resource configured by the base station apparatus, comprising: a transmitter that determines whether or not to make a notification, to the base station apparatus, of information indicating that the terminal apparatus is interested in the data communication between terminal apparatuses, wherein: the information includes a frequency of the data communication between terminal apparatuses, whether or not the information is notified to the base station apparatus is determined at least on a basis of (i) whether or not a system information block is being broadcasted in a cell of the base station apparatus, the system information block indicating that the base station apparatus supports the device-to-device data communication by the terminal apparatus and (ii) whether or not transmission, by the terminal apparatus, of the device-to-device data communication is configured, and in a case where the cell does not support the notification of the information, connection with the base station apparatus is reestablishes by ending a connection re-establishment procedure without carrying out the notification of the information to the base station apparatus. ### Claim 2 A control method applied to a terminal apparatus that performs data communication with a base station apparatus and device-to-device data communication that is direct data communication between terminal apparatuses with use of a radio resource configured by the base station apparatus, comprising at least the step of: determining, whether or not to make a notification, by a transmitter to the base station apparatus, of information indicating that the terminal apparatus is interested in the data communication between terminal apparatuses, wherein: the information includes a frequency of the data communication between terminal apparatuses, whether or not the information is notified to the base station apparatus is determined at least on a basis of (i) whether or not a system information block is being broadcasted in a cell of the base station apparatus, the system information block indicating that the base station apparatus supports the device-to-device data communication by the terminal apparatus and (ii) whether or not transmission, by the terminal apparatus, of the device-to-device data communication is configured, and in a case where the cell does not support the notification of the information, connection with the base station a aratus is reestablished b ending a connection re-establishment procedure without cam in out the notification of the information to the base station apparatus. ### Claim 3 An integrated circuit mounted in a terminal apparatus that performs data communication with a base station apparatus and device-to-device data communication that is direct data communication between terminal apparatuses with use of a radio resource configured by the base station apparatus, the integrated circuit causing the terminal apparatus to exert the function of: determining whether or not to make a notification, by a transmitter to the base station apparatus, of information indicating that the terminal apparatus is interested in the data communication between terminal apparatuses, wherein: the information includes a frequency of the data communication between terminal apparatuses, whether or not the information is notified to the base station apparatus is determined at least on a basis of (i) whether or not a system information block is being broadcasted in a cell of the base station apparatus, the system information block indicating that the base station apparatus supports the device-to-device data communication by the terminal apparatus and (ii) whether or not transmission, by the terminal apparatus, of the device-to-device data communication is configured, and in a case where the cell does not support the notification of the information, connection with the base station apparatus k reestablished by ending a connection re-establishment procedure without carrying out the notification of the information to the base station apparatus. ### Claim 4 (depends on 1) The terminal apparatus of claim 1, wherein the terminal apparatus performs data communication with the base station apparatus which has a plurality of cells having different frequencies. ### Claim 5 (depends on 2) The control method of claim 2, wherein the terminal apparatus performs data communication with the base station apparatus which has a plurality of cells having different frequencies. ### Claim 6 (depends on 3) The integrated circuit of claim 3, wherein the terminal apparatus performs data communication with the base station apparatus which has a plurality of cells having different frequencies.