| US 7,555,663 B2 | ||
| Method and apparatus for managing power in network interface modules | ||
| Anton W. Krantz, Kirkland, Wash. (US); Abhishek Abhishek, Woodinville, Wash. (US); Arun Ayyagari, Seattle, Wash. (US); Jiandong Ruan, Bellevue, Wash. (US); Timothy M. Moore, Bellevue, Wash. (US); Avi R. Geiger, Seattle, Wash. (US); and Warren V. Barkley, Mill Creek, Wash. (US) | ||
| Assigned to Microsoft Corporation, Redmond, Wash. (US) | ||
| Filed on Jan. 12, 2006, as Appl. No. 11/330,766. | ||
| Application 11/330766 is a division of application No. 10/355412, filed on Jan. 13, 2003. | ||
| Prior Publication US 2006/0112291 A1, May 25, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 1/32 (2006.01) | ||
| U.S. Cl. 713—324 [713/300; 713/320; 713/323] | 14 Claims |
| 1. A method to send packets in a device having a network interface module operating in a power saving mode, the network interface
module transmitting the packets from a plurality of sessions and the method comprising the steps of:
sending a packet to an access point for distribution;
determining a delay sleep time for the packet by performing steps comprising:
determining an estimated actual round trip time for the packet by determining a largest actual round trip time for the plurality
of sessions;
setting the delay sleep time to the largest actual round trip time if the estimated actual round trip time is lower than a
beacon interval time; and
setting the delay sleep time to a beacon interval time if the largest actual round trip time is at least a beacon interval
time;
setting a delay sleep timer to time out after the delay sleep time;
sending a message to the access point after the delay sleep timer has timed out to indicate the network interface module is
entering a doze state in which a transmit and/or a receive component of the network interface module is powered down; and
setting the network interface module to the doze state,
wherein the steps of sending the packet, setting the delay sleep timer, sending the message and setting the network interface
module to the doze state occur while the device is associated with the access point.
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