发明名称 |
Communication device providing out-of-range battery saving and method therefor |
摘要 |
A communication device (100) provides an out-of-range battery saving function (700) for a receiver (104) which receives messages transmitted from at least one transmitter (902) over a radio frequency channel. The communication device (100) includes a signal quality detector (154) which detects when the communication device (100) is out-of-range of the transmitter 902, and a controller (108) which determines when the communication device (100) is out-of-range for a first predetermined period of time (726), generating an out-of-range confirmation signal (728). A first visual warning (214, 216, 222) is displayed on a display (128) and power to the receiver (104) is subsequently suspended by a power control circuit (154). Alternately, when out-of-range for a second predetermined period of time (722) less than the first period of time 726, an out-of-range notification signal (724) is generated. The display (128) displays a second visual warning (210) while the power control circuit (154) maintains a supply of power to the receiver (104) to enable in-range detection of the transmitter 902.
|
申请公布号 |
US6219540(B1) |
申请公布日期 |
2001.04.17 |
申请号 |
US19980197989 |
申请日期 |
1998.11.23 |
申请人 |
MOTOROLA, INC.;TIMEX CORPORATION |
发明人 |
BESHARAT MARK;WINZER JOCHEN G.;DALY EDWARD;LIZZI RON;BENNETT LEN |
分类号 |
H04W52/02;(IPC1-7):H04Q7/32 |
主分类号 |
H04W52/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|