Source: http://www.google.com/patents/US6870823?dq=5,581,513
Timestamp: 2016-05-26 19:10:28
Document Index: 266874366

Matched Legal Cases: ['arty 2', 'arty 1', 'arty 2', 'arty 1', 'arty 1', 'arty 2']

Patent US6870823 - Method and apparatus for providing an alert with information signal between ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention is a method and apparatus for providing an Alert With Information Message signal between a mobile switching center and a base station in a cellular communication system. The invention recognizes that current provisions of the IS-634 standard lack support for certain required functionality...http://www.google.com/patents/US6870823?utm_source=gb-gplus-sharePatent US6870823 - Method and apparatus for providing an alert with information signal between a mobile switching center and a base stationAdvanced Patent SearchPublication numberUS6870823 B2Publication typeGrantApplication numberUS 08/863,457Publication dateMar 22, 2005Filing dateMay 27, 1997Priority dateFeb 14, 1997Fee statusPaidAlso published asUS20010043580, US20050174970Publication number08863457, 863457, US 6870823 B2, US 6870823B2, US-B2-6870823, US6870823 B2, US6870823B2InventorsRajeev Krishnamurthi, Bibhu P. Mohanty, Roy F. Quick, Jr.Original AssigneeQualcomm IncExport CitationBiBTeX, EndNote, RefManPatent Citations (7), Non-Patent Citations (2), Referenced by (1), Classifications (12), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for providing an alert with information signal between a mobile switching center and a base station
US 6870823 B2Abstract
The invention is a method and apparatus for providing an Alert With Information Message signal between a mobile switching center and a base station in a cellular communication system. The invention recognizes that current provisions of the IS-634 standard lack support for certain required functionality on the interface between a mobile switching center and a base station, or the A-Interface. An Alert With Information Message signal is introduced on the A-Interface to support the required functionality. Introduction of the Alert With Information Message provides support for reliable call processing on the A-Interface for the call waiting procedure, the hard handoff procedure, and the resolution of a glare condition.
In the CDMA cellular system, a large number of mobile telephone system users, each having a transceiver, communicates through satellite repeaters or terrestrial stations which are also referred to as cells. Each cell includes a physical plant called a base station. A cell covers a limited geographic area and routes calls carried over cellular telephones to and from a telecommunication network via a mobile switching center. When a cellular telephone user moves into the geographic area of a new cell, the routing of that user's call may be eventually made through the new cell by a process called a “handoff”.
The interface between the mobile station and the base station is referred to as the Air-Interface. The telecommunications industry association (TIA) has provided a standard for CDMA call processing on the Air-Interface entitled “IS-95-A Mobile Station—Base Station Compatibility Standard for Dual Mode Wideband Spread Spectrum Cellular System,” hereinafter IS-95-A, which is incorporated by reference. The interface between the base station and the mobile switching center is referred to as the A-Interface. The TIA has provided for call processing on the A-Interface through the standard provided in “IS-634 Mobile Switching Center—Base Station Interface for Public 800 MHz,” which is also incorporated by reference. IS-95-A and IS-634 both define the messages and signals that are sent on their respective interfaces for the operation of a CDMA cellular telephone call.
An exemplary procedure in which deficiencies are recognized on the A-Interface is the call waiting procedure. Call waiting is one feature available to the CDMA cellular subscriber. The call waiting feature allows a cellular subscriber to toggle between two parties on the telephone network. Call waiting may be provided in a CDMA telephone system according to the techniques disclosed in copending U.S. patent application Ser. No. 08/535,998, entitled “Early Detection of Mobile to Mobile,” filed Sep. 29, 1995, which is assigned to the assignee of the present invention and incorporated by reference herein.
If party 2 30 calls MS 32 while MS 32 is communicating with party 1 28, MSC 36 will send signaling data to BS 34 indicating that another party is attempting to contact MS 32. The means for combining traffic data and signaling data is described in detail in U.S. Pat. No. 5,511,073, entitled “METHOD AND APPARATUS FOR THE FORMATTING OF DATA FOR TRANSMISSION,” assigned to the assignee of the present invention and incorporated by reference herein. To inform MS 32 that another call is coming in, an alerting signal is relayed by BS 34 to MS 32 either by a Flash With Information message or an inband tone. Then, MS 32 can invoke the call waiting feature by pushing a specific key on the MS keypad. This causes the generation of a Flash With Information Message, which is sent on the Air-Interface to BS 34, which in turn relays the Flash With Information Message on the A-Interface to MSC 36. MSC 36 then connects party 2 30 to MS 32 while putting party 1 on hold. Thereafter, MS 32 may toggle between party 1 28 and party 2 30 by pushing the key on the keypad to cause the generation of the Flash With Information Message. Each time MSC 36 receives the Flash With Information Message, it connects MS 32 to the party that was previously put on hold and puts on hold the party that was previously on the line.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5590177 *Sep 30, 1994Dec 31, 1996Motorola, Inc.Method for preventing a dropped call during a handoff in a radiotelephone systemUS5633868 *Oct 17, 1994May 27, 1997Lucent Technologies Inc.Virtual circuit management in cellular telecommunicationsUS5822420 *Aug 30, 1996Oct 13, 1998Digital Technics, Inc.Signaling protocol for multilink access network-local exchange interfacesUS5873036 *Sep 20, 1996Feb 16, 1999Watkins-Johnson CompanyApparatus and method for improving cellular communication by associating users on a mobile platform with a common platform identifierUS5878036 *Dec 20, 1995Mar 2, 1999Spartz; Michael K.Wireless telecommunications system utilizing CDMA radio frequency signal modulation in conjunction with the GSM A-interface telecommunications network protocolUS6049543 *Dec 27, 1996Apr 11, 2000Motorola, Inc.Transcoder for use in an ATM-based communications systemUS6157828 *Jan 31, 1997Dec 5, 2000Qualcomm IncorporatedMethod and apparatus for providing an alert with information signal between a mobile switching center and a base station* Cited by examinerNon-Patent CitationsReference1"Mobile Station-Base Station Compatibility Standard for Dual Mode Wideband Spread Spectrum Spread Spectrum Cellular System" TIA/EIA Document/IS-95-A Feb. 27, 1996, pp. 6-160 through 6-161.2"Mobile Station-Base Station Compatibility Standard for Dual Mode Wideband Spread Spectrum Spread Spectrum Cellular System" TIA/EIA Document/IS-95-A Feb. 27, 1996, pp. 6-186 through 6-202.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS20050174970 *Mar 17, 2005Aug 11, 2005Rajeev KrishnamurthiMethod and apparatus for providing an alert with information signal between a mobile switching center and a base station* Cited by examinerClassifications U.S. Classification370/335, 379/241, 370/522International ClassificationH04W76/02, H04W4/16, H04W88/18, H04W36/08Cooperative ClassificationH04W36/08, H04W88/184, H04W4/16, H04W76/028European ClassificationH04W76/02RLegal EventsDateCodeEventDescriptionNov 9, 1998ASAssignmentOwner name: QUALCOMM INCORPORATED, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRISHNAMURTHI, RAJEEV;MOHANTY, BIBHU P.;QUICK, ROY F., JR.;REEL/FRAME:009583/0165;SIGNING DATES FROM 19980108 TO 19980128Aug 19, 2008FPAYFee paymentYear of fee payment: 4Aug 28, 2012FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services