Patent ID: 8767624

Claim:
A power control method by a mobile station (MS) in a communication system, the method comprising: activating, by the MS, a first communication module by supplying power only to the first communication module of a plurality of modules included in the MS; determining, by the MS, whether data is received while activating the first communication module; activating, by the MS, a second communication module of the plurality of modules by supplying power to the second communication module when the data is received; and performing, by the MS, data transmission/reception with an MS-assistant device interacting with the MS using the second communication module, the MS-assistant device being an external device separated from the MS; interrupting, by the MS, power supply to the second communication module when the data transmission/reception is completed; and activating, by the MS, the first communication module by supplying power only to the first communication module.