| 发明名称 | Communication system, communication apparatus and communication method | ||
| 摘要 | A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal. | ||
| 申请公布号 | US9094058(B2) | 申请公布日期 | 2015.07.28 |
| 申请号 | US201414333082 | 申请日期 | 2014.07.16 |
| 申请人 | SONY CORPORATION | 发明人 | Fujii Kunihide;Morita Tadashi;Arisawa Shigeru;Takayama Yoshihisa |
| 分类号 | H04B5/00;H04W74/08 | 主分类号 | H04B5/00 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A method for a communication device, comprising: determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected; generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected; and receiving a modulated RF signal in response to the second RF signal. | ||
| 地址 | Tokyo JP | ||