1.
coverage area; communication range; signal range
The geographic area within which a wireless device can send and receive signals. Used for mobile phones, radio, Wi-Fi, and other wireless communication.
通信圏外で電話が使えない。
The phone doesn't work because it's out of coverage.
山の奥では通信圏に入れないことが多い。
Deep in the mountains, you often can't get into a coverage area.
トンネルを抜けてやっと通信圏に戻り、メッセージが一斉に届いた。
After leaving the tunnel, I finally got back into coverage and all my messages came through at once.
A compound of 通信 (communication, telecommunications) and 圏 (sphere, zone). Commonly encountered when traveling to remote areas or underground locations where mobile phone signals are weak or absent.
COMMON COLLOCATIONS:
- 通信圏外: out of range, out of coverage
- 通信圏内: within range, in coverage
- 通信圏に入る: to enter a coverage area
- 通信圏から外れる: to go out of coverage
RELATED TERMS:
- 圏外: out of range — the shorter, more casual term displayed on Japanese phones when there is no signal
- 圏内: within range — the opposite of 圏外
- 電波: radio waves, signal — the physical signal itself