Invention Grant
US09049650B2 Methods and apparatus for selecting an inter-radio access technology for an electronic device 有权
用于选择电子设备的无线电接入技术的方法和装置

Methods and apparatus for selecting an inter-radio access technology for an electronic device
Abstract:
Methods and apparatus for selecting an inter-radio access technology for an electronic device are disclosed. In an embodiment, a wireless electronic device determines if a first radio signal strength (e.g., LTE) is weak enough that the device should start scanning for another radio access technology (e.g., CDMA). If the first radio signal strength (e.g., LTE) is very weak (e.g., even weaker than the level that caused the device to start scanning), and a second radio signal strength (e.g., CDMA) is above a second threshold, then the device selects the second radio access technology (e.g., switches from LTE to CDMA). If (a) the first radio signal strength (e.g., LTE) is not weak enough to warrant a move to another radio access technology, (b) the second radio signal strength (e.g., CDMA) is not above the second threshold (e.g., not strong enough to warrant a move), and/or (c) a motion sensor determines that the device is relatively stationary (e.g., signal strengths are unlikely to change), then the device sets a back-off timer (e.g., set to expire in one second before trying again, and then two seconds before trying again, then three seconds etc).
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