# US 2019/0173714 A1 · Electronic device and method for synchronous detection between time division duplex wireless communication cells > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173714 A1 - Document ID: US20190173714A1 - Status: Published application - Kind: A1 - Application number: 16/271,902 - Filed: 2019-02-11 - Published: 2019-06-06 - Earliest claimed: 2014-05-29 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Wei BAI - Web page: https://patentgrep.com/patent/US20190173714A1 ## CPC - H04L 27/2655: {Synchronisation arrangements} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 27/2656: {Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation} - H04W 24/00: Supervisory, monitoring or testing arrangements - H04W 56/00: Synchronisation arrangements - H04W 56/0015: {one node acting as a reference for the others} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An electronic device and method for synchronous detection between time division duplex wireless communication cells. The electronic device can access a communication channel of a time division duplex wireless communication system, and includes: an acquisition unit configured to acquire an actual time slot proportion of a target cell and a cell ID and an operator ID of the target cell at a specific moment; and a reporting unit configured to transmit the actual time slot proportion of the target cell and the cell ID and the operator ID thereof to a designee. By this technology, networks of different operators can be detected effectively, and by a comparison with a reference time or a coordinated uplink/downlink time slot proportion, a meaningful comparison result is obtained. Moreover, the measurement or comparison result is provided for a third party, such as a network manager, to confirm, so that the result is more credible. ## Claims ### Claim 1 An electronic device capable of accessing a communication channel of a time division duplex wireless communication system, comprising: acquiring circuitry configured to acquire, at a specific time, an actual time slot allocation of a target cell by synchronizing to the target cell based on a detection period or a maximum detection time interval, as well as a cell ID and an operator ID of the target cell, the target cell serving as a target of synchronization detection of the electronic device; and reporting circuitry configured to transmit the actual time slot allocation of the target cell as well as the cell ID and the operator ID of the target cell to a designated party, wherein the acquiring circuitry is configured to acquire an actual frame start time of the target cell at the specific time; and the reporting circuitry is configured to transmit the actual frame start time of the target cell as well as the cell ID and the operator ID of the target cell to the designated party. ### Claim 2 (depends on 1) The electronic device according to claim 1, wherein: the acquiring circuitry is configured to acquire a target time slot allocation of the target cell, the electronic device further comprises a comparing circuitry which is configured to compare the actual time slot allocation of the target cell with the target time slot allocation, and the reporting circuitry is configured to transmit at least the actual time slot allocation inconsistent with the target time slot allocation as well as the cell ID and the operator ID of the corresponding target cell to the designated party. ### Claim 3 (depends on 2) The electronic device according to claim 2, wherein: the acquiring circuitry is configured to acquire the actual frame start time of the target cell, and acquire a reference time as a time reference, the comparing circuitry is further configured to calculate a difference between the actual frame start time of the target cell and a desired frame start time based on the reference time, and the reporting circuitry is configured to transmit at least the difference having an absolute value greater than a predetermined threshold, as well as the cell ID and the operator ID of the corresponding target cell, to the designated party. ### Claim 4 (depends on 1) The electronic device according to claim 1, wherein: the acquiring circuitry is configured to acquire the actual time slot allocation and the actual frame start time by monitoring system information and a downlink synchronization signal of the target cell respectively. ### Claim 5 (depends on 1) The electronic device according to claim 1, wherein the reporting circuitry is capable of reporting by using radio resource control connection request signaling. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein the acquiring circuitry is configured to receive a designation of the target cell. ### Claim 7 (depends on 1) The electronic device according to claim 1, wherein the electronic device is a dedicated synchronization detection device, which adaptively selects the specific time based on a configured maximum detection time interval. ### Claim 8 (depends on 1) The electronic device according to claim 1, wherein the electronic device is a user equipment capable of performing wireless communication which is configured to perform detection within a specific synchronization interval. ### Claim 9 (depends on 8) The electronic device according to claim 8, wherein the reporting circuitry is further capable of reporting by using radio resource control signaling other than the radio resource control connection request signaling. ### Claim 10 An electronic device for a time division duplex wireless communication system, wherein the electronic device comprises: command circuitry configured to notify a specific terminal device of a target cell serving as a target of synchronization detection, as well as a detection period or a maximum detection time interval for the synchronization detection; and receiving circuitry configured to receive an actual time slot allocation of the target cell as well as a cell ID and an operator ID of the target cell reported by the specific terminal device, wherein the receiving circuitry is configured to receive an actual frame start time of the target cell as well as the cell ID and the operator ID of the target cell reported by the specific terminal device. ### Claim 11 (depends on 10) The electronic device according to claim 10, wherein the command circuitry is further configured to notify the specific terminal device of a target time slot allocation of the target cell. ### Claim 12 (depends on 10) The electronic device according to claim 10, wherein the command circuitry is further configured to notify the specific terminal device of a time source serving as a reference, and wherein the receiving circuitry is configured to receive a difference between the actual frame start time of the target cell and a desired frame start time based on a time of the time source, as well as the cell ID and the operator ID of the target cell reported by the specific terminal device. ### Claim 13 (depends on 10) The electronic device according to claim 10, wherein: the receiving circuitry is configured to perform the reception by detecting radio resource control connection request signaling or measurement result signaling. ### Claim 14 (depends on 10) The electronic device according to claim 10, wherein the electronic device is a base station, and the target cell comprises a cell of the base station, wherein the base station further comprises: determining circuitry configured to determine, based on content received by the receiving circuitry, whether or not the target cell is out of step; and control circuitry configured to perform control to readjust time synchronization of itself when it is determined that itself is out of step, and perform control to send a notification to a designated party when it is determined that a cell other than itself is out of step. ### Claim 15 (depends on 14) The electronic device according to claim 14, wherein the command circuitry is further configured to: measure or estimate a distance from a candidate terminal device to a base station of the target cell based on an advanced amount of an uplink transmission time of the candidate terminal device, a path loss of the present cell or a signal arrival angle of the candidate terminal device, and select and activate a candidate terminal device at a distance from the base station of the target cell less than or equal to a predetermined distance threshold as the specific terminal device for performing the synchronization detection on the target cell. ### Claim 16 (depends on 10) The electronic device according to claim 10, wherein: the command circuitry is further configured to activate the detection of the specific terminal device in response to detecting that interference exceeds a predetermined threshold. ### Claim 17 A method of detecting synchronization between cells in a time division duplex wireless communication system, comprising: acquiring, at a specific time, an actual time slot allocation of a target cell by synchronizing to the target cell based on a detection period or a maximum detection time interval, as well as a cell ID and an operator ID of the target cell, the target cell serving as a target of synchronization detection of the electronic device; and transmitting the actual time slot allocation and an actual frame start time of the target cell as well as the cell ID and the operator ID of the target cell to a designated party. ### Claim 18 A method of detecting synchronization between cells in a time division duplex wireless communication system, comprising: notifying a specific terminal device of a target cell serving as a target of synchronization detection, as well as a detection period or a maximum detection time interval of the synchronization detection; and receiving an actual allocation of the target cell and an actual frame start time of the target cell as well as a cell ID and an operator ID of the target cell reported by the specific terminal device.