中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.026 seconds)

    METHODS AND APPARATUS FOR PROTECTION AGAINST NETWORK FAILURES
    11.
    发明专利
    METHODS AND APPARATUS FOR PROTECTION AGAINST NETWORK FAILURES 未知

    公开(公告)号：CA2344132C

    公开(公告)日：2005-06-07

    申请号：CA2344132

    申请日：2001-04-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： NAGARAJAN RAMESH ,  DOSHI BHARAT TARACHAND

    IPC: H04L12/56 ,  H04L12/437 ,  H04Q11/00 ,  H04Q11/04 ,  H04L29/14

    Abstract: Units of traffic are routed between nodes in a network on corresponding sets of trunks, such that the traffic is balanced between disjoint paths. A restoration process for the traffic is implemented using service layer or transport layer switching. In a first embodiment, first and second nodes are connected by first and second sets of trunks, with each of the trunks in a given set of trunks supporting a designated portion of a given one of the units of traffic. The units of traffic are then routed such that a first half of a given one of the units of traffic is routed on a first one of the trunks in a given on e of the sets of trunks, and a second half of the given unit is routed on a second one of the trunks in the given set of trunks. In other embodiments, the first and second nodes are connected by first and second sets of trunks so as to form a four-trunk ring, with each of the first and second sets of trunks including a primary trunk and a backup trunk. A given one of the units of traffic is then routed on either an upper or lower portion of the ring. The four trunk ring may be in the form of an IP/optical hybrid ring, in which case the restorati on process is implemented using service layer switching, or a SONET/optical ring, in which case the restoration process is implemented using transport layer switching.

    12.
    发明专利
    未知

    公开(公告)号：DE69916747D1

    公开(公告)日：2004-06-03

    申请号：DE69916747

    申请日：1999-09-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DOSHI BHARAT TARACHAND ,  HERNANDEZ-VALENCIA ENRIQUE ,  SRIRAM KOTIKALAPUDI ,  WANG YUNG-TERNG ,  YUE ON-CHING

    IPC: H04L12/46 ,  H04L12/56 ,  H04L29/06 ,  H04M7/00 ,  H04Q3/00 ,  H04L12/64 ,  H04L12/24

    Abstract: A quality of service guarantee for voice and other delay sensitive transmissions within an Internet Protocol (IP) network is provided by identifying the IP network path utilized for IP packet transmission between source and destination edge devices and virtually provisioning IP network path bandwidth for priority voice traffic. Priority for voice packets and admission control of new voice calls (and other delay sensitive traffic) based on the remaining available capacity over the IP network path guarantees that high priority voice (and other delay sensitive traffic) meet stringent delay requirements. A Virtual Provisioning Server is utilized to maintain bandwidth capacity data for each path segment within the IP network and to forward the bandwidth capacity data to a Signaling Gateway. The Signaling Gateway determines whether to accept or reject an additional delay sensitive traffic component based upon available bandwidth capacity for an IP network path. The Signaling Gateway then signals the originating source edge device as to its determination to accept or reject. Quality of Service guarantees concerning acceptable delay and jitter characteristics for real-time transmission over an IP network are therefore provided without the need to directly signal the individual IP routers over which an IP network path is established.

    METHODS AND APPARATUS FOR PROTECTION AGAINST NETWORK FAILURES
    17.
    发明专利
    METHODS AND APPARATUS FOR PROTECTION AGAINST NETWORK FAILURES 未知

    公开(公告)号：CA2344132A1

    公开(公告)日：2001-12-06

    申请号：CA2344132

    申请日：2001-04-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： NAGARAJAN RAMESH ,  DOSHI BHARAT TARACHAND

    IPC: H04L12/56 ,  H04L12/437 ,  H04Q11/00 ,  H04Q11/04 ,  H04L29/14

    Abstract: Units of traffic are routed between nodes in a network on corresponding sets of trunks, such that the traffic is balanced between disjoint paths. A restoration process for the traffic is implemented using service layer or transport layer switching. In a first embodiment, first and second nodes are connected by first and second sets of trunks, with each of the trunks in a given set of trunks supporting a designated portion of a given one of the units of traffic. The units of traffic are then routed such that a first half of a given one of the units of traffic is routed on a first one of the trunks in a given on e of the sets of trunks, and a second half of the given unit is routed on a second one of the trunks in the given set of trunks. In other embodiments, the first and second nodes are connected by first and second sets of trunks so as to form a four-trunk ring, with each of the first and second sets of trunks including a primary trunk and a backup trunk. A given one of the units of traffic is then routed on either an upper or lower portion of the ring. The four trunk ring may be in the form of an IP/optical hybrid ring, in which case the restorati on process is implemented using service layer switching, or a SONET/optical ring, in which case the restoration process is implemented using transport layer switching.

    CELLULAR SYSTEM ARCHITECTURES SUPPORTING DATA SERVICES
    19.
    发明专利
    CELLULAR SYSTEM ARCHITECTURES SUPPORTING DATA SERVICES 未知

    公开(公告)号：CA2286466C

    公开(公告)日：2000-10-10

    申请号：CA2286466

    申请日：1997-03-12

    Applicant: LUCENT TECHNOLOGIES INC

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

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

    Abstract: The present invention relates to a cellular communication system that is comprised of a plurality of 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 connected to a public switched telephone network (PSTN). A digital cellular switch (DCS) is provided which has ATM fabric, radio link protocol processors, and vocoders, where the vocoders are connected to the PSTN, and where the ATM fabric is 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 voice and data calls from/to the radio ports. A network interworking module interfaces the DCS to a communications network. A voice call is set-up by the plurality of functions implemented on the standard hardware platforms, so that a voice communication path is established from the terminal device to the PSTN, which includes the air interface and one or more of the radio ports and ATM virtual links, the ATM fabric, and one of the vocoders. A data call is set-up by the plurality of functions implemented on the standard hardware platforms, so that a data communication path is established from the terminal device to the communications network, which includes the air interface and one or more of the radio ports and ATM virtual links, the ATM fabric, one of said radio protocol processors, and the network interworking module.

    A LOGICAL LINK CONNECTION SERVER
    20.
    发明专利
    A LOGICAL LINK CONNECTION SERVER 未知

    公开(公告)号：CA2232320A1

    公开(公告)日：1998-10-14

    申请号：CA2232320

    申请日：1998-03-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BALDWIN JOHN HENRY ,  DOSHI BHARAT TARACHAND ,  DRAVIDA SUBRAHMANYAM ,  MATRAGI WASSIM A ,  JIANG HONG ,  NANDA SANJIV

    IPC: H04Q3/00 ,  H04L12/56 ,  H04Q7/38 ,  H04Q11/04

    Abstract: A digital cellular/personal communications service (PCS) application incorporate s a logical link connection (LLC) server. In this approach, there are two ATM conn ections in the path of an AAL-2 connection: one between a base station and the LLC Serve r and the other between the LLC Server and a vocoder group. All LLCs from, or to, a gi ven base station use a common ATM connection irrespective of the vocoder used at the other end. Similarly, all LLCs from, or to, a given vocoder group use a common ATM connection irrespective of the destination base station at the other end. At the LLC Server, LLC packets from many base stations destined for the same vocoder group are extracted and bundled into the ATM connection between the LLC Server and the destination vocoder group. Similar treatment is given to the packets originating at vocoders and destined for base stations. Thus, each ATM connection between a particular base station and the LLC server and each ATM connection between the L LC Server and a particular vocoder group are used to maximum capacity notwithstandi ng each ATM connection conveys LLCs to different LLC endpoints.

Patent Agency Ranking