US RE40,032 E1 | ||
Wireless data communication system having power saving function | ||
Hendrik van Bokhorst, Nijkerk (Netherlands); Albertus M. G. Claessen, Oakwood, Ga. (US); Wilhelmus J. M. Diepstraten, Haghorst (Netherlands); Johannes P. N. Haagh, Eindhoven (Netherlands); Hendrik Moelard, Maarssen (Netherlands); Leo Monteban, Nieuwegein (Netherlands); and Rienk Mud, Wijk bij Duurstede (Netherlands) | ||
Assigned to Agere Systems Inc., Allentown, Pa. (US) | ||
Filed on Feb. 19, 2003, as Appl. No. 10/368,018. | ||
Application 10/368018 is a reissue of application No. 08/127268, filed on Sep. 27, 1993, now 6,192,230, filed on Feb. 20, 2001. | ||
Claims priority of application No. 9304638 (GB), filed on Mar. 06, 1993. | ||
Int. Cl. H04B 7/14 (2006.01) |
U.S. Cl. 455—343.2 [455/517; 455/574; 455/426.1; 455/41.2; 455/343.4; 370/311] | 179 Claims |
[ 18. A method of operating a wireless data communication system including a plurality of wireless stations, comprising the
steps of:
broadcasting synchronizing messages from a selected station of the plurality of stations;
identifying which of a number of non-selected stations of the plurality of stations are to receive data messages by transmitting traffic indicator information
from the selected station, wherein at least two non-selected stations were identified in the identifying step;
operating the non-selected stations in an awake state of relatively high power consumption during the broadcasting step and the identifying
step;
changing the operating state of non-selected stations that were not identified in the identifying step to a doze state of relatively low power consumption after
the broadcasting step and the identifying step is performed;
maintaining all non-selected stations that were identified in the identifying step in the awake state for at least a time period beginning immediately
after completion of the operating step so that one or more data messages are able to be transmitted to the non-selected stations which were identified in the identifying step;
transmitting all data messages exchanged between the non-selected stations via the selected station;
including in the synchronizing messages destination identifying portions identifying non-selected stations that are to receive data messages;
further including in the synchronizing messages header portions and broadcast message indicator portions to be transmitted
to the respective non-selected stations that are to receive data messages; and
returning the non-selected stations to the doze state.]
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