(12) United States Patent ao) Patent No.: us 6,765,893 Bi
Bayley (45) Date of Patent: Jul. 20,2004
(54) DYNAMIC RECOGNITION OF AN EMPTY GENERAL PAGING MESSAGE
(75) Inventor: Gwain Bayley, Carlsbad, CA (US)
(73) Assignee: Qualcomm Incorporated, San Diego, CA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/540,797
(22) Filed: Mar. 31, 2000
(51) Int. CI.7 H04B 7/216
(52) U.S. CI 370/335; 370/342; 370/441
(58) Field of Search 370/311, 335,
370/342, 441, 313; 375/140, 147, 149, 152; 455/33.1, 33.2, 33.3, 33.4, 38.1, 38.3, 63, 311, 343, 403, 458, 504, 572, 574,
(56) References Cited
U.S. PATENT DOCUMENTS
5,930,706 A * 7/1999 Raith 455/422.1
6,041,217 A 3/2000 Martin et al.
6,240,304 Bl 5/2001 Blankenstein et al.
FOREIGN PATENT DOCUMENTS
0780989 A2 * 6/1997 H04B/1/16
A method of and an apparatus for reducing the average power consumption in a remote unit in a wireless communication system. When a remote unit in a slotted mode communication system receives a general paging massage, it deinterleaves and decodes the raw data samples. Prior to parsing, it compares the decoded data samples with samples stored in a memory. Based on this comparison, the remote unit determines whether or not the message is empty. If the message is empty, the remote unit transitions to an inactive state. By comparing before parsing, the remote unit is able to conserve power by entering the inactive state sooner. If no samples are stored in the memory, instead of comparing, the remote unit parses the message and executes any instructions. If, upon parsing, the remote unit determines the message to be empty, at least a portion of the message is stored in the memory.
29 Claims, 6 Drawing Sheets