中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

11 records (took 0.021 seconds)

    2.
    发明专利
    未知

    公开(公告)号：DE60316684D1

    公开(公告)日：2007-11-15

    申请号：DE60316684

    申请日：2003-06-10

    Applicant: QUALCOMM INC

    Inventor： WEI YONGBIN ,  HO SAI YIU ,  LEUNG NIKOLAI K N

    IPC: H04L1/18 ,  H04J13/00 ,  H04L29/08

    Abstract: Techniques for retransmitting data via RLP in a CDMA (e.g., cdma2000) system with a first retransmission mechanism provided by the RLP and a second retransmission mechanism provided by an HARQ-CF. In one method, missing RLP frames are first detected (e.g., by a receiver RLP). A dynamic timer is then maintained (e.g., by a receiver HARQ-CF) for each RLP frame detected to be missing. The dynamic timers are event-driven and have variable time durations. Each dynamic timer is updated based on events known to the receiver HARQ-CF. Fixed timers with fixed time durations may also be maintained (e.g., by the receiver RLP) for the missing RLP frames. Whether or not a missing RLP frame is lost is determined based on the dynamic timer and the fixed timer (if any) maintained for the RLP frame. A NAK may be issued for retransmission of each RLP frame deemed to be lost.

    3.
    发明专利
    未知

    公开(公告)号：DE60228870D1

    公开(公告)日：2008-10-23

    申请号：DE60228870

    申请日：2002-10-31

    Applicant: QUALCOMM INC

    Inventor： QUICK ROY FRANKLIN ,  HO SAI YIU

    IPC: H04L9/08 ,  H04L9/06 ,  H04L29/06 ,  H04W12/00 ,  H04W12/04

    Abstract: In a communication system (100), a method and apparatus provides for message integrity regardless of the operating version of an authentication center (198) or an interface (197) between the authentication center (198) and a mobile switching center (199). The method and apparatus include generating a cellular message encryption algorithm (CMEA) key, and generating a CMEA-key-derived integrity key (CIK) based on the CMEA key for message integrity between a mobile station and a base station. The mobile station transmits a registration message to the base station, and determines an operating version of the authentication center (198) in communication with the base station based on whether the mobile station receives a registration accepted order or some elements of an authentication vector from the base station. The CIK is generated based on the CMEA key, if the mobile station receives a valid registration accepted order from the base station.

    APPARATUS AND METHOD FOR UPLINK POWER CONTROL OF WIRELESS COMMUNICATIONS
    4.
    发明专利
    APPARATUS AND METHOD FOR UPLINK POWER CONTROL OF WIRELESS COMMUNICATIONS 未知

    公开(公告)号：CA2675781A1

    公开(公告)日：2008-08-21

    申请号：CA2675781

    申请日：2008-02-14

    Applicant: QUALCOMM INC

    Inventor： MALLADI DURGA PRASAD ,  MONTOJO JUAN ,  HO SAI YIU ,  DAMNJANOVIC ALEKSANDAR

    IPC: H04B7/005

    Abstract: Systems and methodologies are described that facilitate employing periodi c closed loop power control corrections in a wireless communication environm ent. A periodic power control command can be sent over a downlink to control and/or correct an uplink power level employed by an access terminal. Each p eriodic power control command can be generated based upon an uplink periodic transmission sent from the access terminal. The periodic power control comm ands can be communicated via a Physical Downlink Control Channel (PDCCH) or in-band signaling. Moreover, access terminals can be grouped to enhance effi ciency of downlink transfer of the periodic power control commands. The peri odic power control commands can be halted upon access terminal uplink resour ces being deallocated. For instance, these resources can be deallocated afte r an inactivity period of the access terminal. Thereafter, the access termin al can initiate random access (e.g., leveraging open loop mechanisms) to res ume periodic power control command transmission.

    5.
    发明专利
    未知

    公开(公告)号：BRPI0810984A2

    公开(公告)日：2015-01-27

    申请号：BRPI0810984

    申请日：2008-05-01

    Applicant: QUALCOMM INC

    Inventor： HO SAI YIU ,  DAMNJANOVIC ALEKSANDAR

    IPC: H04B1/16

    Abstract: Systems and methodologies are described that facilitate operating an access terminal in an LTE based wireless communication environment utilizing extended microsleep. While in non-DRX mode, an access terminal can operate in on state for a first period of time and in extended microsleep state for a second period of time. Further, the first and second periods of time can form a repeating pattern where these periods of time alternate. Thus, the access terminal can turn on its receiver for the first period of time (e.g., decode downlink information while in on state) and turn off its receiver for the second period of time (e.g., inhibit decoding of downlink information while in extended microsleep state). Further, the first period of time in the repeating pattern can be one TTI (e.g., 1 ms) and the second period of time in the repeating pattern can be a plurality of TTIs (e.g., 5 ms).

    7.
    发明专利
    未知

    公开(公告)号：DE60328818D1

    公开(公告)日：2009-09-24

    申请号：DE60328818

    申请日：2003-11-17

    Applicant: QUALCOMM INC

    Inventor： MEYLAN ARNAUD ,  HO SAI YIU ,  WEI YONGBIN

    IPC: H04L1/18 ,  H04L1/16

    Abstract: A group of data frames from a plurality of communication channels is received. At least one idle frame including a sequence number of a last frame in the group of data frames is then received. A delay period of time is allowed to elapse after receiving the idle frame before sending a negative acknowledgement message, if at least one data frame is missing.

    9.
    发明专利
    未知

    公开(公告)号：DE60228565D1

    公开(公告)日：2008-10-09

    申请号：DE60228565

    申请日：2002-05-09

    Applicant: QUALCOMM INC

    Inventor： CASACCIA LORENZO ,  HO SAI YIU ,  SINNARAJAH RAGULAN

    IPC: H04B7/005 ,  H04W28/08 ,  H04W52/08 ,  H04W52/10 ,  H04W74/04 ,  H04W74/08

    Abstract: In a communication system (100), a method and apparatus provide for efficient control of call requests from mobile stations (102-104) to base station (101). Mobile station (102-104) receives an initial call request block probability from base station (101), determines an elapsed time from an effective time of the initial call request block probability, and adjusts the initial call request block probability based on an elapsed time. Mobile station (102-104) uses the adjusted initial call request to block call request.

    10.
    发明专利
    未知

    公开(公告)号：DE60316684T2

    公开(公告)日：2008-07-17

    申请号：DE60316684

    申请日：2003-06-10

    Applicant: QUALCOMM INC

    Inventor： WEI YONGBIN ,  HO SAI YIU ,  LEUNG NIKOLAI K N

    IPC: H04L1/18 ,  H04J13/00 ,  H04L29/08

    Abstract: Techniques for retransmitting data via RLP in a CDMA (e.g., cdma2000) system with a first retransmission mechanism provided by the RLP and a second retransmission mechanism provided by an HARQ-CF. In one method, missing RLP frames are first detected (e.g., by a receiver RLP). A dynamic timer is then maintained (e.g., by a receiver HARQ-CF) for each RLP frame detected to be missing. The dynamic timers are event-driven and have variable time durations. Each dynamic timer is updated based on events known to the receiver HARQ-CF. Fixed timers with fixed time durations may also be maintained (e.g., by the receiver RLP) for the missing RLP frames. Whether or not a missing RLP frame is lost is determined based on the dynamic timer and the fixed timer (if any) maintained for the RLP frame. A NAK may be issued for retransmission of each RLP frame deemed to be lost.

Patent Agency Ranking