| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform control so that a communication means is switched to a power saving mode without switching a control means such as a CPU to a normal driving mode when a communication means, which has received packet data in the power saving mode, judges that the packet data are unnecessary. <P>SOLUTION: When the packet data arrive in the power saving mode, a PHY (Physical Layer Device) 40 and an MAC (Media Access Control) 42 are switched to a normal driving mode. Then, a filter part 420 extracts only packet data as the object of reception based on protocol information stored in a condition storage part 422. When the packet data are not the object of reception, the MAC 42 instructs a power supply control part 32 to supply a power in a power saving mode, and the PHY 40 and the MAC 42 are switched to the power saving mode. Thus, a device control part 20 is not switched to the normal driving mode but restored into the power saving mode. Thus, it is possible to improve the effects of power saving. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
