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    102.
    发明专利
    未知

    公开(公告)号：DE69920079D1

    公开(公告)日：2004-10-21

    申请号：DE69920079

    申请日：1999-03-02

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KUMAR SARATH ,  NANDA SANJIV ,  SONG LEI

    IPC: H04L1/00 ,  H04B1/04 ,  H04B7/005 ,  H04B7/26

    Abstract: A technique for controlling the power with which a wireless terminal transmits is disclosed. One embodiment of the present invention comprises: transmitting a first signal at a first power level; receiving a series of n power control signals, bi-n+1 through bi; setting a step size based on a measure of dispersion of the n power control signals; and transmitting a second signal at a second power level that is based on the first power level and the step size.

    103.
    发明专利
    未知

    公开(公告)号：DE60006315T2

    公开(公告)日：2004-09-09

    申请号：DE60006315

    申请日：2000-06-06

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KUMAR SARATH ,  NANDA SANJIV ,  RUBIN HARVEY ,  VITEBSKY STANLEY

    IPC: H04B7/005 ,  H04B7/26 ,  H04W36/18 ,  H04W52/12 ,  H04W52/54 ,  H04Q7/38

    Abstract: A back haul architecture effectively reduces the reactivation times for both forward-link and reverse-link data transmissions over CDMA wireless communications systems, by relying on packet-mode transmissions over the back haul between a frame selection/distribution (FSD) function and the appropriate base stations for both forward-link data and reverse-link data. In particular, for the forward direction, the FSD function transmits forward-link data only to one base station (i.e., the primary base station), which is solely responsible for controlling the forward-link air interface with the corresponding mobile unit. As such, the forward link always operates in simplex mode for data transmissions, independent of how many base stations are operating in soft handoff for the reverse link with the same mobile unit. For the reverse direction, each base station that receives frames of reverse-link data from the mobile unit, assigns a time tag to the frame, divides the frame into one or more data packets, assigns a different sequence number to each data packet, and transmits the data packets to the FSD function over the back haul, all without first synchronizing time with any other base station that is also operating in reverse-link soft hand-off with that mobile unit. The FSD function (or preferably the radio link protocol (RLP) function) is then responsible for selecting packets of reverse-link data for subsequent processing (e.g., transmission to the network end of the connection). By limiting forward-link data transmissions to simplex mode and using packet-mode transmissions for reverse-link data, the need to first synchronize timing between the various base stations is eliminated for both forward-link and reverse-link data transmissions. As a result, reactivation delays are greatly reduced.

    104.
    发明专利
    未知

    公开(公告)号：DE60001470D1

    公开(公告)日：2003-04-03

    申请号：DE60001470

    申请日：2000-04-18

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KHAN FAROOQ ULLAH ,  KNISELY DOUGLAS N ,  KUMAR SARATH ,  MEDAPALLI KAMESWARA RAO ,  NANDA SANJIV

    IPC: H04L1/12 ,  H04L1/16 ,  H04L1/18 ,  H04L29/08

    Abstract: A variable length sequence number is used to identify data units in a communication channel. The sequence number associated with the most recent data that has been received successfully and the sequence number expected with the next new data message to be received are examined to determine the minimum size sequence number necessary to unambiguously identify to the transmitter incorrectly received data that must be retransmitted in a later message. The receiver provides the transmitter with the sequence number associated with the last successfully received byte of data and the sequence number associated with the next expected byte of data. The receiver communicates this information to the transmitter using a NAK control message. The transmitter then uses the sequence number of the next byte of data to be transmitted and the information received in the control message from the receiver to determine the smallest number of bits necessary to represent the sequence numbers for both data transmissions and the retransmission of data that was not received properly by the receiver.

    CELLULAR SYSTEM ARCHITECTURES SUPPORTING DATA SERVICES
    106.
    发明专利
    CELLULAR SYSTEM ARCHITECTURES SUPPORTING DATA SERVICES 未知

    公开(公告)号：CA2286470C

    公开(公告)日：2002-07-23

    申请号：CA2286470

    申请日：1997-03-12

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DOSHI BHARAT TARACHAND ,  NANDA SANJIV ,  EJZAK RICHARD PAUL ,  DRAVIDA SUBRAHMANYAM ,  TREVENTI PHILIP ANDREW ,  SAWKAR ANIL S

    IPC: H04W84/02 ,  H04J3/00 ,  H04M3/00 ,  H04Q3/00 ,  H04Q11/04 ,  H04W88/18 ,  H04Q7/22 ,  H04L12/56

    Abstract: The present invention relates to a cellular communication system that is comprised of a plurality of base stations and radio ports that communicate over an air interface with a plurality of terminal devices, where the radio ports have asynchronous transfer mode (ATM) interfaces. A cellular switch is provided having circuit-switching fabric and vocoders, where the base stations are connected to the circuit-switching fabric by first communications links, and where the circuit-switching fabric is also connected to a public switched telephone network (PSTN). A cellular call control processor is associated with the cellular switch, that handles a voice call routed through the cellular switch. A digital cellular switch (DCS) having ATM fabric and radio link protocol processors is also provided, where the circuit switching fabric is connected to the ATM fabric by a second communications link via a converter that converts between the transmission format of the first communications links and ATM, the ATM fabric being connected to the radio ports by ATM virtual links. One or more standard hardware platforms implement ATM transport that perform a plurality of call control functions including the handling of data calls from/to the base stations and radio ports. A network interworking module interfaces the DCS toa communications network.

    107.
    发明专利
    未知

    公开(公告)号：BR0105351A

    公开(公告)日：2002-07-09

    申请号：BR0105351

    申请日：2001-11-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KHAN FAROOQ ULLAH ,  NANDA SANJIV

    IPC: H04L1/18 ,  H04L12/28 ,  H04Q7/38

    Abstract: Disclosed is an ARQ technique that efficiently utilizes channel resources while allowing for scheduling flexibility. The ARQ technique is an asynchronous parallel packet transmission technique which utilizes packet identifiers, sequence identifiers and user identifiers. The ARQ technique does not require a strict timing relationship to exist between parallel channels and physical layer frames because the identifiers would indicate to the user the user to whom a sub-packet is intended, the identity of the sub-packet and the sequence of the sub-packet.

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