| 摘要 |
A two-way communication system includes an in-vehicle unit and a plurality of portable units. The in-vehicle unit includes a plurality of in-vehicle communication units, and an in-vehicle control unit. The in-vehicle unit or the portable units each include a received electric field strength detection unit that detects received electric field strength, and a received electric field strength determination unit that performs determination, based on the received electric field strength. In a case where the received electric field strength is less than a predetermined value, the plural in-vehicle communication units and one of the portable units are communication-connected to each other, and in a case where the received electric field strength is greater than or equal to the predetermined value, the plural in-vehicle communication units and the plural portable units are communication-connected to each other on a one-to-one basis. |
| 主权项 |
1. A two-way communication system comprising:
an in-vehicle unit installed in a vehicle; and a plurality of portable units that perform two-way communication with the in-vehicle unit, wherein the in-vehicle unit includes a plurality of in-vehicle communication units configured to perform two-way communication with the portable units, and an in-vehicle control unit configured to control communication connections between the in-vehicle communication units and the portable units, and one of the in-vehicle unit or the portable units each include: a received electric field strength detection unit configured to detect received electric field strength in the two-way communication between the in-vehicle unit and the portable units, and a received electric field strength determination unit configured to perform determination, based on the received electric field strength, wherein in a case where the received electric field strength is less than a predetermined value, the plural in-vehicle communication units and one of the portable units are communication-connected to each other, and in a case where the received electric field strength is greater than or equal to the predetermined value, the plural in-vehicle communication units and the plural portable units are communication-connected to each other on a one-to-one basis. |
