| 摘要 |
When a wireless base station temporarily runs short of communication resources, the base station searches for a portable telephone having a relay function of mobile communication. Based on a demand of the wireless base station, the portable telephone having the relay function relays communication of a portable telephone within a communication area of the base station on behalf of the base station. This portable telephone can communicate with an adjacent wireless base station and can communicate with a receiving portable telephone and another portable telephone having the relay function.
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