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AssigneeNtt Docomo, Inc.
InventorsHiroki Harada, Yongbo Zeng, Qun Zhao, Yongsheng Zhang
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The present invention is designed so that, when a plurality of inter-terminal discovery signals with varying numbers of information bits are used in a radio communication system in which inter-terminal communication is carried out, user terminals can be discovered based on the inter-terminal discovery signals. According to the inter-terminal communication method of the present invention, a user terminal (#1) determines the signal format of a discovery signal based on the number of information bits of the discovery signal, transmits the discovery signal based on the signal format, and also transmits signal format information to represent this signal format. A user terminal (#2) receives the signal format information from the user terminal (#1), and, based on the signal format represented by the signal format information, detects the discovery signal.
A user terminal that transmits an inter-terminal discovery signal to another user terminal without involving a radio base station, the user terminal comprising:
A user terminal that receives an inter-terminal discovery signal from another user terminal without involving a radio base station, the user terminal comprising:
An inter-terminal communication method for use in a radio communication system in which an inter-terminal discovery signal is transmitted from a first user terminal to a second user terminal without involving a radio base station, the inter-terminal communication method comprising the steps of:
Dependencies are inferred from the claim text.