# US 12,010,590 B2 · Communication device, communication method, and storage medium for implementing coexistence with legacy system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,590 B2 - Document ID: US12010590B2 - Status: Granted - Kind: B2 - Application number: 17/146,716 - Filed: 2021-01-12 - Published: 2021-05-06 - Granted: 2024-06-11 - Earliest claimed: 2018-08-06 - Assignees: Kddi Corporation - Applicants: Kddi Corporation - Inventors: Kazuya Moriwaki; Masaya Shibayama; Yasuhiro Suegara; Takeo Ohseki - Web page: https://patentgrep.com/patent/US12010590B2 ## CPC - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/1215: {for collaboration of different radio technologies} - H04W 88/08: Access point devices - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - H04W 92/20: between access points - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 A communication device, which is capable of performing communication via a second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, transmits, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period, and performs communication involving a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode. ## Claims ### Claim 1 A communication device capable of performing communication via a second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, the communication device comprising: a communication circuit; and a controller that controls the communication circuit, wherein the communication device is a base station device of the second wireless communication system capable of performing communication via the second wireless communication system in the frequency band, and the controller controls the communication circuit to transmit, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period, and controls the communication circuit to perform communication involving transmission of a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode. ### Claim 2 (depends on 1) The communication device according to claim 1, wherein the first wireless communication system conforms to the Long Term Evolution (LTE) standard, and the second wireless communication system conforms to the New Radio Access Technology (NR) standard. ### Claim 3 (depends on 2) The communication device according to claim 2, wherein the mode is a mode in which a multimedia broadcast single frequency network (MBSFN) subframe is on, and the predetermined period corresponds to a period in which the MB SFN subframe is on. ### Claim 4 (depends on 3) The communication device according to claim 3, wherein the information further contains an instruction for causing the base station device of the first wireless communication system not to transmit data in the MB SFN subframe. ### Claim 5 (depends on 1) The communication device according to claim 1, wherein the information further contains information indicating a timing to shift the base station device of the first wireless communication system to the mode. ### Claim 6 (depends on 1) The communication device according to claim 1, wherein the controller further controls the communication circuit to transmit, to the base station device of the first wireless communication system, information indicating at least either a cycle or a frequency to shift the base station device of the first wireless communication system to the mode. ### Claim 7 (depends on 6) The communication device according to claim 6, wherein the frequency is set based on the number of terminal devices capable of performing communication via the second wireless communication system in the frequency band. ### Claim 8 (depends on 6) The communication device according to claim 6, wherein the frequency is set based on the number of beams that are used by the communication device in communication in the frequency band. ### Claim 9 (depends on 1) The communication device according to claim 1, wherein the controller controls the communication circuit to transmit the information to the base station device of the first wireless communication system, in response to connection to a terminal device capable of performing communication via the second wireless communication system in the frequency band, in a second frequency band that is different from the frequency band, in a state in which communication via the second wireless communication system in the frequency band is not performed. ### Claim 10 (depends on 1) The communication device according to claim 1, wherein the controller controls the communication circuit to transmit information for interrupting the operation in the mode, to the base station device of the first wireless communication system, in response to cancellation of connection to all terminal devices capable of performing communication via the second wireless communication system in the frequency band. ### Claim 11 A communication method that is performed by a communication device that is a base station device of a second wireless communication system capable of performing communication via the second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, the communication method comprising: transmitting, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period; and performing communication involving transmission of a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode. ### Claim 12 A non-transitory computer-readable storage medium that stores a program for causing a computer included in a communication device that is a base station device of a second wireless communication system capable of performing communication via the second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, to execute: transmitting, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period; and performing communication involving transmission of a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode.