WiMax Enhanced Sleep Mode

• US 20140169250A1
• Filed: 02/24/2014
• Published: 06/19/2014
• Est. Priority Date: 02/09/2006
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Banerjea, Raja, Ganton, Robert B., Donovan, Timothy J., Chowdhuri, Bhaskar
• Granted Patent: US 9,037,198 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0293 having a sub-controller with a low clock frequency switching on and off a main controller with a high clock frequency
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Enhancements are provided to lower power consumption in a wireless communication device. A traffic indicator message is designated to be positioned at or near a first burst to be transmitted to a subscriber station. Further, a clock signal provided to a decoder in the subscriber station has a variable frequency, the frequency being chosen based on the nature of the data to be decoded. Data needing immediate decoding is processed with a high speed clock. Other data are processed with a lower speed clock to reduce power consumption. Also, control information that is demodulated when the subscriber station is in sleep mode is batch processed when the subscriber station becomes active again.

Claims

1. A method for managing power consumption in a subscriber station in a wireless communication system, the method comprising:

engaging the subscriber station in sleep mode;

receiving a first burst of a frame;

analyzing the first burst while the subscriber station is in sleep mode to determine if there is a wake up indicator;

directing the subscriber station to exit sleep mode if the wake up indicator is present in the first burst or otherwise maintaining the subscriber station in the sleep mode.