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    METHOD AND DEVICE INTERSYSTEM BASE STATION HANDOVER
    182.
    发明专利
    METHOD AND DEVICE INTERSYSTEM BASE STATION HANDOVER 未知

    公开(公告)号：HU0300911A2

    公开(公告)日：2003-07-28

    申请号：HU0300911

    申请日：2001-03-07

    Applicant: QUALCOMM INC

    Inventor： GARDNER WILLIAM ,  GRILLI FRANCESCO ,  JAIN AVINASH

    IPC: H04W84/00 ,  H04B17/40 ,  H04W36/14 ,  H04W36/18 ,  H04W84/08 ,  H04Q7/38

    Abstract: A mobile wireless telecommunications system includes base stations of a first type operating according to a first air interface, and base stations of a second type operating according to a second air interface. Methods and apparatus are provided for handing over a mobile station in the system from a first base station, which is of the first type, to a second base station, which is of the second type. A communications link is established over the first air interface between the mobile station and the first base station. Data are received from the mobile station responsive to a signal received by the mobile station over the second air interface from the second base station, substantially without breaking the communications link with the first base station. The mobile station is handed over from the first to the second base station responsive to the data received therefrom. In particular, a method of conducting intersystem handover from a multicarrier system to a direct spread system is provided. Timing synchronization is also advantageously made available through the mobile station.

    Method for performing radio resource level registration in a wireless communication system
    183.
    发明专利
    Method for performing radio resource level registration in a wireless communication system 未知

    公开(公告)号：AU2637401A

    公开(公告)日：2001-07-24

    申请号：AU2637401

    申请日：2001-01-09

    Applicant: QUALCOMM INC

    Inventor： JAIN AVINASH ,  TIEDEMANN EDWARD G JR

    IPC: H04W8/26 ,  H04W60/00 ,  H04Q7/38

    Abstract: Techniques to reduce the amount of registration required by a mobile station in a wireless communication system, especially if the registration zones are defined to be small areas. In one scheme, a mobile station registers (e.g., at R-level) with a network entity (e.g., a base station) each time it enters a new registration zone, which can correspond to an R-TMSI zone defined by GSM MC-MAP. The mobile station maintains a timer for each zone with which it has already registered but has since left. If the mobile station leaves a particular zone for a period longer than a time-out period, the registration with that zone times out, and the mobile station re-registers with that zone whenever it re-enters the zone. The mobile station may implement zone-based, timer-based, implicit, traffic channel RR, and some other registrations, or a combination thereof. Parameters to facilitate registration may be defined by a base station.

    BASE STATION SYNCHRONIZATION FOR HANDOVER IN A HYBRID GSM/CDMA NETWORK
    187.
    发明专利
    BASE STATION SYNCHRONIZATION FOR HANDOVER IN A HYBRID GSM/CDMA NETWORK 未知

    公开(公告)号：CA2850221C

    公开(公告)日：2016-03-01

    申请号：CA2850221

    申请日：2001-01-08

    Applicant: QUALCOMM INC

    Inventor： GRILLI FRANCESCO ,  JAIN AVINASH

    IPC: H04W36/08 ,  H04J3/00 ,  H04W36/14 ,  H04W56/00

    Abstract: A mobile wireless telecommunications system includes base stations (30) of a first type operating according to a first air interface, and base stations (36) of a second type operating according to a second air interface. Methods and apparatus are provided for handing over a mobile station (40) in the system from a first base station (30), which is of the first type, to a second base station (36), which is of the second type. A communications link is established over the first air interface between the mobile station (40) and the first base station (30). Data is received from the mobile station (40) responsive to a signal received by the mobile station (40) over the second air interface from the second base station (36), substantially without breaking the communications link with the first base station. The mobile station (40) is handed over from the first (30) to the second base station (36) responsive to the data received therefrom.

    METHOD AND APPARATUS FOR IMPROVING DATA TRANSMISSION RELIABILITY IN A WIRELESS COMMUNICATIONS SYSTEM
    188.
    发明专利
    METHOD AND APPARATUS FOR IMPROVING DATA TRANSMISSION RELIABILITY IN A WIRELESS COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2601637C

    公开(公告)日：2015-08-11

    申请号：CA2601637

    申请日：2006-03-21

    Applicant: QUALCOMM INC

    Inventor： JAIN AVINASH ,  LUNDBY STEIN A

    IPC: H04L1/18

    Abstract: Techniques for performing duplicate detection and re-ordering for a HARQ transmission are described. For duplicate detection, a receiver determines whether a decoded packet x for an ARQ channel y is a duplicate packet based on packet x and a prior decoded packet for ARQ channel y. For re-ordering, the receiver determines whether an earlier packet is still pending on any other ARQ channel based on prior decoded packets for the ARQ channels and forwards packet x only if there are no pending earlier packets. There are no pending earlier packets on another ARQ channel z if (1) a decoded packet was received on ARQ channel z at a designated time or later or (2) a decoded packet was not received on ARQ channel z within a time window from current time.

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