# US 2020/0288361 A1 · Wireless communication system, wireless terminal, and wirelesscommunication metho > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288361 A1 - Document ID: US20200288361A1 - Status: Published application - Kind: A1 - Application number: 16/806,789 - Filed: 2020-03-02 - Published: 2020-09-10 - Earliest claimed: 2019-03-05 - Assignees: Renesas Electronics Corporation - Applicants: Renesas Electronics Corporation - Inventors: Kazuhisa OKADA; Hiroki SUGIMOTO - Web page: https://patentgrep.com/patent/US20200288361A1 ## CPC - H04W 52/0261: {managing power supply demand, e.g. depending on battery level} - H04W 36/385: {of the core network} - H04W 52/0212: {managed by the network, e.g. network or access point is leader and terminal is follower} - H04W 36/033: {in pre-organised networks} - H04W 36/24: Reselection being triggered by specific parameters - H04W 36/38: by fixed network equipment - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 88/12: Access point controller devices - 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) - 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 wireless communication system includes a wireless base station, a plurality of wireless terminals that communicate with the wireless base station using a first communication function, communicate with each other using a second communication function that consumes less power than the first communication function, and are driven by a battery, and a wireless controller. According to the configuration, it is possible to solve problems of the battery replacement cost of the wireless terminals in the system. ## Claims ### Claim 1 A wireless communication system comprising: a wireless base station; a plurality of wireless terminals each of which is driven by a battery; a wireless control device configured to control a communication between the wireless base station and the wireless terminals; wherein the wireless base station and the wireless terminals are configured to communicate by a first communication function or a second communication function, a power consumption of the second communication function being lower than that of the first communication function, wherein the wireless control device determines, from the wireless terminals, a first wireless terminal whose remaining battery capacity is low and a second wireless terminal whose remaining battery capacity is higher than that of the first wireless terminal, wherein the wireless control device controls a communication between the wireless base station and the second wireless terminal to be performed by the first communication function, and controls a communication between the first wireless terminal and the second wireless terminal to be performed by the second communication function. ### Claim 2 (depends on 1) The wireless communication system according to claim 1, wherein the wireless control device controls a communication between the wireless base station and the first wireless terminal to be performed via the second wireless terminal. ### Claim 3 (depends on 2) The wireless communication system according to claim 2, wherein the first wireless terminal transmits an uplink data to the second wireless terminal by the second communication function, and wherein the second wireless terminal transmits the uplink data to the wireless base station by the first communication function. ### Claim 4 (depends on 3) The wireless communication system according to claim 3, wherein the wireless base station transmits a downlink data to the second wireless terminal by the first communication function, and wherein the second wireless terminal transmits the downlink data to the first wireless terminal by the first communication function. ### Claim 5 (depends on 1) The wireless communication system according to claim 1, wherein each of the wireless terminals is configured to send own remaining battery capacity data to the base station. ### Claim 6 (depends on 1) The wireless communication system according to claim 1, wherein the wireless control device is configured to redetermine the first wireless terminal and the second wireless terminal. ### Claim 7 (depends on 1) The wireless communication system according to claim 1, wherein the wireless control device is further configured to determine a third wireless terminal which relays the communication between the first wireless terminal and the second wireless terminal. ### Claim 8 (depends on 7) The wireless communication system according to claim 7, wherein the first wireless terminal transmits an uplink data to the second wireless terminal by the second communication function via the third wireless terminal, and wherein the second wireless terminal transmits the uplink data to the wireless base station by the first communication function. ### Claim 9 (depends on 8) The wireless communication system according to claim 8, wherein the wireless base station transmits a downlink data to the second wireless terminal by the first communication function, and wherein the second wireless terminal transmits the downlink data to the first wireless terminal by the first communication function via the third wireless terminal. ### Claim 10 A wireless communication system comprising: a wireless base station; a first wireless terminal driven by a first battery; a second wireless terminal driven by a second battery; wherein a remaining capacity of the first battery is lower than that of the second battery, wherein a communication between the wireless base station and the second wireless terminal is performed by a first communication function, wherein a communication between the first wireless terminal and the second wireless terminal is performed by a second communication function whose power consumption is lower than that of the first communication function, wherein a communication between the wireless base station and the first wireless terminal is performed via the second wireless terminal. ### Claim 11 (depends on 10) The wireless communication system according to claim 10, wherein the first wireless terminal transmits an uplink data to the second wireless terminal by the second communication function, and wherein the second wireless terminal transmits the uplink data to the wireless base station by the first communication function. ### Claim 12 (depends on 11) The wireless communication system according to claim 11, wherein the wireless base station transmits a downlink data to the second wireless terminal by the first communication function, and wherein the second wireless terminal transmits the downlink data to the first wireless terminal by the first communication function. ### Claim 13 (depends on 10) The wireless communication system according to claim 10, further comprising a third wireless terminal which relays the communication between the first wireless terminal and the second wireless terminal.