Source: http://www.google.com/patents/US7221664?dq=7181427
Timestamp: 2014-03-11 15:29:27
Document Index: 624640518

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'art 1', 'art 1', 'art%201', 'art 2', 'art 2', 'art%202']

Patent US7221664 - Transmittal of heartbeat signal at a lower level than heartbeat request - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers allows the base station to identify the...http://www.google.com/patents/US7221664?utm_source=gb-gplus-sharePatent US7221664 - Transmittal of heartbeat signal at a lower level than heartbeat requestAdvanced Patent SearchPublication numberUS7221664 B2Publication typeGrantApplication numberUS 10/171,080Publication dateMay 22, 2007Filing dateJun 12, 2002Priority dateJun 1, 1998Fee statusPaidAlso published asCA2450680A1, CA2450680C, CA2689861A1, CN1528094A, CN100534236C, CN101692744A, EP1396158A1, EP1396158A4, EP1396158B1, EP2479903A1, US8369277, US20030086399, US20120170484, WO2002102095A1Publication number10171080, 171080, US 7221664 B2, US 7221664B2, US-B2-7221664, US7221664 B2, US7221664B2InventorsJames A. Proctor, Jr.Original AssigneeInterdigital Technology CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (99), Non-Patent Citations (40), Referenced by (2), Classifications (64), Legal Events (9) External Links: USPTO, USPTO Assignment, EspacenetTransmittal of heartbeat signal at a lower level than heartbeat requestUS 7221664 B2Abstract A communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers allows the base station to identify the request markers using alternative criteria with a low probability of error, where the alternative criteria may include comparing the markers to respective energy level thresholds, monitoring occupancy of time slots, occupancy of mutually exclusive code channels, or combinations thereof. For example, in one particular embodiment, a request marker, which is generally a high priority marker, is transmitted with higher power, which improves the probability of detection and reduces the probability of false detection of the request marker.
RELATED APPLICATION(S) This application claims the benefit of U.S. Provisional Application No. 60/378,697, filed on May 7, 2002; U.S. Provisional Application No. 60/297,925, filed on Jun. 13, 2001; and is a continuation-in-part of U.S. application Ser. No. 09/775,305, filed Feb. 1, 2001, now U.S. Pat. No. 7,079,523, entitled �Maintenance Link Using Active/Standby Request Channels,� by G. Rodney Nelson, Jr., et al; and U.S. application Ser. No. 09/997,621, filed Nov. 29, 2001, now U.S. Pat. No. 6,678,260, entitled �System and Method for Maintaining Wireless Channels Over a Reverse Link of a CDMA Wireless Communication System,� by James A. Proctor, Jr., which is a continuation of application Ser. No. 09/730,376, filed Dec. 5, 2000, now U.S. Pat. No. 6,707,804, which is a continuation of application Ser. No. 09/088,413, filed Jun. 1, 1998, now U.S. Pat. No. 6,222,832, which is a continuation-in-part of application Ser. No. 08/992,760, filed Dec. 17, 1997, now U.S. Pat. No. 6,081,536, and a continuation-in-part of application Ser. No. 08/992,759, filed Dec. 17, 1997, now U.S. Pat. No. 6,151,332 and a continuation-in-part of application Ser. No. 09/030,049, filed Feb. 24, 1998; now U.S. Pat. No. 6,236,647, the entire teachings of the above applications are incorporated herein by reference.
Before discussing an example detector system (FIG. 2) that can be used to distinguish a heartbeat from a heartbeat-with-request signal, a brief discussion of example signals will be discussed in reference to FIGS. 3A�3C.
Pfd ⁢ ⁢ ( RQST ) = ( 1 - Pd ⁢ ⁢ ( HB ) ) * Pfd ⁢ ⁢ ( HB ) = 5 ⁢ % * 0.1 ⁢ % = 5 ⁢ E - 5 , ( 2 ) where Pfd is the probability of false detection and Pd is the probability of detection.
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III, pp. 1548-1551.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7394791 *Jun 12, 2002Jul 1, 2008Interdigital Technology CorporationMulti-detection of heartbeat to reduce error probabilityUS7817972 *Oct 29, 2004Oct 19, 2010Telefonaktiebolaget Lm Ericsson (Publ)Method and arrangement for mutual information based power control* Cited by examinerClassifications U.S. Classification370/335, 370/352, 455/445, 370/336International ClassificationH04J3/00, H04W28/04, H04J11/00, H04B7/005, H04B7/216, H04J13/00, H04W52/28, H04W52/50, H04B7/208, H04B1/707, H04L27/26, H04L1/00, H04L25/14, H04B7/26, H04L12/28, H04L1/18, H04L1/16, H04Q11/04, H04L7/06, H04W84/14, H04W74/04, H04W72/04Cooperative ClassificationH04W76/02, H04Q2213/13202, H04Q2213/13332, H04Q2213/13209, H04W76/048, H04W52/50, H04L7/06, H04L27/2601, H04Q11/0428, H04W28/26, H04W24/00, H04W8/005, H04W84/14, Y02B60/50, H04Q2213/13204, H04Q2213/1327, H04Q2213/1336, H04L25/14, H04Q2213/13098, H04Q2213/13298, H04Q2213/13389, H04W52/325, H04W74/0866, H04W28/04, H04W74/04, H04L1/165, H04Q2213/13216, H04W52/16, H04W88/02, H04W48/08, H04B1/707European ClassificationH04B1/707, H04W28/26, H04W52/32C, H04L25/14, H04Q11/04S, H04L7/06, H04L1/16F9WLegal EventsDateCodeEventDescriptionJan 2, 2013ASAssignmentOwner name: INTEL CORPORATION, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:IPR LICENSING, INC.;REEL/FRAME:029555/0660Effective date: 20120904Oct 25, 2011CCCertificate of correctionFeb 23, 2011ASAssignmentEffective date: 20101130Owner name: IPR LICENSING, INC., DELAWAREFree format text: MERGER;ASSIGNOR:TANTIVY COMMUNICATIONS, INC.;REEL/FRAME:025852/0304Oct 20, 2010FPAYFee paymentYear of fee payment: 4Aug 12, 2008CCCertificate of correctionFeb 26, 2004ASAssignmentOwner name: INTERDIGITAL ACQUISITION CORP., DELAWAREFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TANTIVY COMMUNICATIONS, INC.;REEL/FRAME:015000/0141Effective date: 20030730Owner name: INTERDIGITAL PATENT CORPORATION, DELAWAREFree format text: MERGER;ASSIGNOR:INTERDIGITAL ACQUISITION CORP.;REEL/FRAME:015000/0577Effective date: 20040218Owner name: TANTIVY COMMUNICATIONS, INC., DELAWAREFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERDIGITAL PATENT CORPORATION;REEL/FRAME:015017/0577Effective date: 20040225Feb 19, 2004ASAssignmentOwner name: INTERDIGITAL PATENT CORPORATION, DELAWAREFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERDIGITAL ACQUISITION CORPORATION;REEL/FRAME:014351/0777Effective date: 20040218Jul 24, 2003ASAssignmentOwner name: IPR HOLDINGS DELAWARE, INC., PENNSYLVANIAFree format text: SECURITY INTEREST;ASSIGNOR:TANTIVY COMMUNICATIONS, INC.;REEL/FRAME:014289/0207Effective date: 20030722Jan 13, 2003ASAssignmentOwner name: TANTIVY COMMUNICATIONS, INC., FLORIDAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PROCTOR, JAMES A. JR.;REEL/FRAME:013658/0384Effective date: 20021213RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google