Adaptive transmit power adjustment for phone in hand detection using wearable device

• Main Authors: YING ZHINONG, AGARDH K RE, STRAND PER, RODZEVSKI ALEKSANDAR, BENGTSSON HENRIK
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2016
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; WIRELESS COMMUNICATIONS NETWORKS

A system including a wireless communication device and a peripheral device communicate with each other using radio frequency (RF) waves that are propagated using a user's own body as a transmission medium. The wireless communication device selectively controls the transmit output power of the peripheral device to cause the peripheral device to transmit data and information in a low-power transmission mode. This minimizes the amount of RF waves that are received at the wireless communication device as reflected RF waves, but helps to ensure that the RF waves that do reach the wireless communication device are transmitted as surface waves along the user's skin. Responsive to the receipt of the surface waves, and based on a validity of the information carried by those surface waves, the wireless communication device transitions from a locked state to an unlocked state. 包括无线通信设备和外围设备的系统，无线通信设备和外围设备使用射频(RF)波彼此通信，使用用户自己的身体作为传输介质传播射频(RF)波。无线通信设备选择性地控制外围设备的发送输出功率，以使外围设备在低功率传输模式下发送数据和信息。这最小化在无线通信设备处被接收作为反射RF波的RF波的量，但是