中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

38 records (took 0.023 seconds)

    RANDOM ACCESS IN A MOBILE TELECOMMUNICATIONS SYSTEM
    5.
    发明专利
    RANDOM ACCESS IN A MOBILE TELECOMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2346078A1

    公开(公告)日：2000-04-13

    申请号：CA2346078

    申请日：1999-08-17

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BEMING PER ,  DAHLMAN ERIK ,  EDVARDSSON MARIA

    IPC: H04J3/16 ,  H04L1/18 ,  H04W36/16 ,  H04W74/08 ,  H04Q7/38

    Abstract: A method for processing multiple random access requests is disclosed in whic h a base station (204) transmits an acquisition indicator signal (A), which indicates that the base station (204) has detected the presence of a random access transmission (P,M). The acquisition indicator (A) can be generated based (212) on the amount of energy received (210) on the random access channel (e.g., as opposed to the correct/incorrect decoding of a random acce ss message). Consequently, the delay between the beginning of the random access transmission (P,M) and the beginning of the acquisition indicator transmissions (A) is significantly shorter than the delay to the beginning o f an acknowledgement transmission based on the reception of a correctly decode d random access message. If a mobile station (202) does not receive a positive acquisition indicator (A), it should interrupt the present transmission and start to retransmit the random access burst in the next time slot, while modifying the transmission power level accordingly between the successive re - transmissions.

    7.
    发明专利
    未知

    公开(公告)号：BRPI0617648A2

    公开(公告)日：2011-08-02

    申请号：BRPI0617648

    申请日：2006-10-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BALDEMAIR ROBERT ,  EDVARDSSON MARIA ,  DAHLMAN ERICK ,  HAARTSEN JACOBUS CORNELIS ,  PARKVALL STEFAN

    IPC: H04B7/26 ,  H04J3/06

    Abstract: The present disclosure relates to a technique for performing a random access procedure over a radio interface (106), for example between a mobile terminal (102) and a radio base station (104) of a mobile network (108). A method aspect of the disclosure comprises the steps of transmitting a synchronization request (112) for synchronization information; receiving synchronization information (114) in response to the synchronization request; and transmitting, based on at least one transmission parameter adjusted in accordance with the synchronization information, a resource request (116) for data transmission resources. The method further comprises starting a synchronization timer in response to at least one of the reception of synchronization information and the transmission of data.

    8.
    发明专利
    未知

    公开(公告)号：BRPI0617640A2

    公开(公告)日：2011-08-02

    申请号：BRPI0617640

    申请日：2006-10-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BALDEMAIR ROBERT ,  EDVARDSSON MARIA ,  DAHLMAN ERIK ,  HAARTSEN JACOBUS CORNELIS ,  PARKVALL STEFAN

    IPC: H04W74/08

    Abstract: The invention relates to a technique of performing a random access procedure over a radio interface (106) in a mobile terminal (102). A method embodiment or the random access procedure as performed in the mobile terminal comprises the steps of selecting an access time slot for transmission of an access burst (112) over the radio interface; and setting an access bandwidth for transmission of the access burst, wherein the access bandwidth is set smaller than an available transmission bandwidth associated with the radio interface.

    10.
    发明专利
    未知

    公开(公告)号：AT421199T

    公开(公告)日：2009-01-15

    申请号：AT05779357

    申请日：2005-09-07

    Applicant: ERICSSON TELEFON AB L M

    Inventor： DAHLMAN ERIK ,  ENGLUND EVA ,  CHENG JUNG-FU ,  WANG YI-PIN ERIC ,  EDVARDSSON MARIA ,  PARKVALL STEFAN ,  PEISA JANNE

    IPC: H04L1/18 ,  H04B20060101 ,  H04B7/005 ,  H04L1/00

    Abstract: Methods for improving uplink communications in a Wideband Code Division Multiple Access (WCDMA) communication system, wherein mobile terminals can transmit at various transmission power levels. In a mobile terminal, the method includes the steps of receiving a configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; when the mobile terminal performs a non-scheduled transmission, it transmits according to the parameters contained in the configuration message. In a network node, the method includes the steps of transmitting to at least one mobile terminal the configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; and, adjusting a power setting for the transmission of acknowledgement or negative-acknowledgement messages from the wireless network to one or more of mobile terminals.

Patent Agency Ranking