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    Call setup
    12.
    发明专利
    Call setup 未知

    公开(公告)号：GB2366142A

    公开(公告)日：2002-02-27

    申请号：GB0104021

    申请日：2001-02-19

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GOSS STEPHEN CLIFFORD ,  LIGHT JEFFREY ROSS ,  LIU CHUNG-ZIN ,  SALVADOR OMAR HERNANDO ,  SHAH GITESH P ,  STOCKERT MARK KEVIN ,  STROM KENNETH WAYNE ,  VARVARO CHARLES ,  WILSON RANDALL JOE

    IPC: H04Q3/00 ,  H04W28/02 ,  H04W72/04 ,  H04Q7/38

    Abstract: In an embodiment for establishing a cellular mobile call, if no radio traffic (voice or data) channels are available for a calling or called mobile station (MS), then a test is made to determine the expected wait time before a channel becomes available. If the expected wait time is less than a first threshold, then the call or the call request is queued. If a channel for an incoming call to an MS does not become available before a second time threshold, then the caller is notified by an announcement that the call has been queued and is expected to be established in a short time. If the caller of an incoming call to the MS does not disconnect, then the MSC waits for an available channel and establishes a connection to the MS over that available channel. For an outgoing call from an MS, a control message is sent to the MS to trigger an indication of the queued status to the user. The indication may be one or more tones, a data display, or the playing of a pre-recorded announcement. Advantageously, the number of calls blocked because of unavailable traffic channels is reduced. Advantageously, the same arrangement can be used to reduce blocking of calls because of unavailability of trunks for a link of a call connection in a PSTN.

    16.
    发明专利
    未知

    公开(公告)号：BR9905822A

    公开(公告)日：2000-08-08

    申请号：BR9905822

    申请日：1999-12-10

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CHEN BYRON HUA ,  VARVARO CHARLES ,  PALAMARA MARIA E

    IPC: G01C21/00 ,  G01S5/00 ,  G01S5/10 ,  G01S19/48 ,  H04W64/00 ,  H04Q7/38

    Abstract: A local positioning system (LPS) uses the radio propagation parameters in a CDMA forward link or TDMA reverse link to establish a mobile station's position. The mobile station receives pilot channel signals from at least three distinct base stations and records the PN chip offset of the pilot channel signals. The LPS time difference of arrival triangulation approach requires no additional signal detection capabilities. Base stations send out pilot channel signals that arrive at a mobile station with a particular phase and at least a predetermined minimum strength. The mobile station reports back the "visible" pilot channel signals, their phases and signal strength to the LPS which uses a location non-linear system, expressed as a set of cost functions, to estimate the mobile location. The LPS can also solve the 9-1-1 mobile location problem for wireless CDMA systems by determining the position of a person in distress that has a digital cellular phone.

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