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    METHOD REDUCING COLLISION OF MESSAGES IN COMMUNICATION NETWORK AND DEVICE TO IMPLEMENT IT
    14.
    发明专利
    METHOD REDUCING COLLISION OF MESSAGES IN COMMUNICATION NETWORK AND DEVICE TO IMPLEMENT IT 未知

    公开(公告)号：RU2171013C2

    公开(公告)日：2001-07-20

    申请号：RU94045877

    申请日：1993-03-04

    Applicant: QUALCOMM INC

    Inventor： EHDVARD G TAJDMEHNN ML ,  LINDSEJ A VIVER ML ,  ROBERTO PADOVANI

    IPC: H04B1/707 ,  H04B1/7103 ,  H04B7/26 ,  H04J13/00 ,  H04J13/10 ,  H04J13/16 ,  H04L1/16 ,  H04L12/28 ,  H04L12/403 ,  H04L12/413 ,  H04L27/30 ,  H04W28/04 ,  H04W52/48 ,  H04W52/50 ,  H04W74/00 ,  H04W74/08

    Abstract: cellular telephone systems. SUBSTANCE: invention specifically refers to system raising reliability of cellular telephone system in surrounding media with many-pronged transmission of signals or under conditions of simultaneous attempt by great number of mobile telephone units trying to gain access to base station. Transmitters can be mobile stations and receiver can be base station in CDMA cellular telephone system. Each station employs one or more procedures of randomization for distribution of messages. With first randomization mobile station delays its transmission in time by number of unit elements of pseudocode with the aid of which transmitted signal is expanded. Noise function generates number unambiguously coupled to given mobile station from identification number. With second randomization mobile station selects pseudocode, with third randomization mobile station inserts random delay between sequential transmission of messages or tests if it does not receives acknowledgment after preset interruption period. Preset number of such transmissions is called sequence of tests. With fourth randomization mobile station inserts relatively long random delay between consistent sequences of tests if it does not receive acknowledgment of any test in sequence. Level of noise is diminished by way of minimization of power of transmission. Mobile station raises power of sequential tests within limits of each sequence of tests. First test in each sequence of tests is transmitted at specified level. EFFECT: diminished number of collisions between messages in communication system. 15 cl, 6 dwg

    METHOD AND DEVICE FOR SEARCHING PILOT SIGNAL IN CELLULAR COMMUNICATION NETWORK
    15.
    发明专利
    METHOD AND DEVICE FOR SEARCHING PILOT SIGNAL IN CELLULAR COMMUNICATION NETWORK 未知

    公开(公告)号：RU2150176C1

    公开(公告)日：2000-05-27

    申请号：RU97110197

    申请日：1995-11-22

    Applicant: QUALCOMM INC

    Inventor： ROBERTO PADOVANI ,  VALID KHAMDI ,  DZHIL BAR-DAVID

    IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30 ,  H04Q7/38

    Abstract: FIELD: cellular communication with multiple base stations. SUBSTANCE: mobile station generates sequence of active call pilot signals, which are transmitted by base stations to which the mobile station established communication. In addition, mobile station generates sequence of Neighbor set pilot signals, which are transmitted by base stations which are located in close proximity to the mobile station. Search method involves comparison of measured intensities of pilot signals, which correspond to records associated to each base station in Neighbor set, to first threshold level. One or several records of Neighbor set corresponding to base stations, which measured signal level is greater than first threshold level, can be stored in set of prospective choices. Then method involves evaluation of levels of pilot signals associated to records in set of prospective choices for detection of their acceptance for their allocation to choice set, which is used for selection of records included into Active call set. EFFECT: pilot signal search for transmission of mobile station communication between bases stations. 36 cl, 7 dwg

    METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM
    16.
    发明专利
    METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM 未知

    公开(公告)号：ZA908859B

    公开(公告)日：1991-09-25

    申请号：ZA908859

    申请日：1990-11-05

    Applicant: QUALCOMM INC

    Inventor： GILHOUSEN KLEIN S ,  KLEIN S GILHOUSEN ,  PADOVANI ROBERTO ,  ROBERTO PADOVANI ,  WHEATLEY CHARLES E III ,  CHARLES E WHEATLEY III

    IPC: H04B7/005 ,  H04B7/26 ,  H04W52/00 ,  H04W52/02 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/40 ,  H04W52/52 ,  H04J ,  H04M ,  H04B

    Abstract: A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so as to arrive at the cell-site at a desired power level.

    METHOD AND APPARATUS FOR PERFORMING SOFT HAND-OFF IN A WIRELESS COMMUNICATION SYSTEM.
    18.
    发明专利
    METHOD AND APPARATUS FOR PERFORMING SOFT HAND-OFF IN A WIRELESS COMMUNICATION SYSTEM. 未知

    公开(公告)号：MY118178A

    公开(公告)日：2004-09-30

    申请号：MYPI9800362

    申请日：1998-01-26

    Applicant: QUALCOMM INC

    Inventor： ROBERTO PADOVANI ,  QUICK ROY F

    IPC: H04W36/18 ,  H04B7/26 ,  H04W48/20

    Abstract: A METHOD AND APPARATUS FOR PROVIDING SOFT HANDOFF IN A MOBILE COMMUNICATION SYSTEM. IN CURRENT SYSTEM THE MEMBERS OF AN ACTIVE SET ARE DETERMINED IN ACCORDANCE WITH COMPARISONS OF MEASURED PILOT ENERGY WITH FIXED THRESHOLDS. HOWEVER, THE VALUE OF PROVIDING A REDUNDANT COMMUNICATION LINK TO A MOBILE STATION (2), DEPENDS STRONGLY ON THE ENERGY OF OTHER SIGNALS BEING PROVIDED TO THE MOBILE STATION (2). IN THE PRESENT INVENTION, THE SIGNAL STRENGTHS OF OTHER BASE STATIONS (4) IN COMMUNICATION WITH A MOBILE STATION (2) ARE CONSIDERED WHEN DETERMINING WHETHER ADDING A BASE STATION TO THAT SET OF BASE STATIONS IN COMMUNICATION WITH THE REMOTE STATION (2) IS OF SUFFICIENT VALUE TO JUSTIFY THE IMPACT ON SYSTEM CAPACITY. (FIGURE 3)

    PILOT SIGNAL SEARCHING TECHNIQUE FOR A CELLULAR COMMUNICATIONS SYSTEM
    19.
    发明专利
    PILOT SIGNAL SEARCHING TECHNIQUE FOR A CELLULAR COMMUNICATIONS SYSTEM 未知

    公开(公告)号：MY112600A

    公开(公告)日：2001-07-31

    申请号：MYPI19953548

    申请日：1995-11-21

    Applicant: QUALCOMM INC

    Inventor： GIL BAR-DAVID ,  ROBERTO PADOVANI ,  WALID HAMDY

    IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30

    Abstract: AN IMPROVED METHOD AND SYSTEM FOR PERFORMING A PILOT SIGNAL SEARCHING OPERATION IN ANTICIPATION OF HANDOFF IN MOBILE STATION COMMUNICATION BETWEEN BASE STATIONS IS DISCLOSED HEREIN. THE SEARCHING OPERATION IS DESCRIBED HEREIN AS BEING IMPLEMENTED WITHIN A CELLULAR COMMUNICATION SYSTEM WHICH USES CODE DIVISION MULTIPLE ACCESS (COMA) MODULATION TECHNIQUES. THE MOBILE STATION MAINTAINS A LIST OF AN ACTIVE SET OF PILOT SIGNALS TRANSMITTED FROM BASE STATIONS WITH WHICH THE MOBILE STATION IS TO COMMUNICATE THROUGH, AND A NEIGHBOR SET OF PILOTS FROM BASE STATIONS WITHIN A PREDETERMINED PROXIMITY OF THE MOBILE STATION. IN ADDITION TO THE NEIGHBOR AND ACTIVE SETS OF PILOTS, THE MOBILE STATION MAINTAINS A LIST OF CANDIDATE AND PRE-CANDIDATE SETS OF PILOTS. BASED ON ANALYSIS OF THE SIGNAL STRENGTH OF THE PILOT SIGNALS RECEIVED AT THE MOBILE STATION, BASE STATION ENTRIES FROM THE NEIGHBOR SET MAY BE ASSIGNED TO THE PRE-CANDIDATE AND CANDIDATE SETS, AND EVENTUALLY TO THE ACTIVE SET. THE SEARCHING OPERATION CONTEMPLATES COMPARING PILOT SIGNAL STRENGTH MEASUREMENTS CORRESPONDING TO EACH BASE STATION ENTRY WITHIN THE NEIGHBOR SET TO A FIRST PREDETERMINED LEVEL. ONE OR MORE ENTRIES FROM THE NEIGHBOR SET HAVING A BASE STATION SIGNAL STRENGTH MEASUREMENT GREATER THAN THE FIRST PREDETERMINED LEVEL MAY BE PLACED IN THE PRE-CANDIDATE SET. THE STRENGTH OF THE PILOT SIGNALS ASSOCIATED WITH ENTRIES IN THE PRE-CANDIDATE SET ARE THEN FURTHER EVALUATED TO DETERMINE ELIGIBILITY WITHIN THE CANDIDATE SET, FROM WHICH ARE SELECTED THE ENTRIES COMPRISING THE ACTIVE SET.(FIG.5A)

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