公开(公告)号：DE69916747T2

公开(公告)日：2005-03-31

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.

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.

公开(公告)号：CA2199763C

公开(公告)日：2000-10-17

申请号：CA2199763

申请日：1997-03-12

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04W84/02 ,  H04J3/00 ,  H04M3/00 ,  H04Q3/00 ,  H04Q11/04 ,  H04W88/18 ,  H04Q7/24 ,  H04L12/56

Abstract: Four stages of digital cellular architecture are presented which reuse much of the existing voice infrastructure while allowing graceful introduction of data and integrated voice/data services over industry standard, low cost platforms. First, a separate ATM-based infrastructure is introduced that supports data services. A new data call control is introduced on industry standard hardware platforms using object oriented and modular programming. Second, ATM is introduced at radio ports and call control functions are migrated to the new ATM-based call control platforms. Third, vocoders are introduced at the DCS. Fourth, the cellular functions of the legacy cellular switch are phased out and replaced by the ATM-based target architecture.

公开(公告)号：CA2279030A1

公开(公告)日：2000-03-22

申请号：CA2279030

申请日：1999-07-29

Applicant: LUCENT TECHNOLOGIES INC

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

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

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 devises 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 fitter 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.

公开(公告)号：CA2262774A1

公开(公告)日：1999-09-06

申请号：CA2262774

申请日：1999-02-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DRAVIDA SUBRAHMANYAM ,  DOSHI BHARAT TARACHAND ,  MATRAGI WASSIM A ,  HERNANDEZ-VALENCIA ENRIQUE ,  QURESHI MUHAMMED AKBER

IPC: H04L7/04 ,  H04L7/08 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  H04Q11/04

Abstract: A simple point-to-point data link protocol (SDL) is defined which is based on the use of a length indicator field and an error check field, rather than a flag, for performing packet boundary recovery in a receiver. In an embodiment of the invention, an SDL transmitter transmits SDL packets comprising a header and a variable length payload. The SDL header comprises a length indicator (LI) field, a type field and a cyclic redundancy check (CRC) field. For receiving these transmitted SDL packets, SDL supports the use of a self-synchronization/self-delineation technique in the receiver. The receiver performs self-delineation as a function of the LI field, and performs self synchronization, or packet recovery, as a function of both the LI field and the header CRC field. In particular, in performing packet recovery, the receiver performs a CRC check over each received SDL packet header and synchronization is declared after N correct checks, e.g., N = 4. The SDL receiver operates in a hunt made when performing synchronization, and a normal mode when synchronization has been accomplished.

公开(公告)号：CA2286470A1

公开(公告)日：1997-10-10

申请号：CA2286470

申请日：1997-03-12

Applicant: LUCENT TECHNOLOGIES INC

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

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 to a communications network.

公开(公告)号：CA2286466A1

公开(公告)日：1997-10-10

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

Abstract: Four stages of digital cellular architecture are presented which reuse much of the existing voice infrastructure while allowing graceful introduction of data and integrated voice/data services over industry standard, low cost platforms. First, a separate ATM-based infrastructure (46) is introduced that supports data services. A new data call control is introduced on industry standard hardware platforms using object oriented and modular programming. Second, ATM is introduced at radio ports (68) and call control functions are migrated to the new ATM-based call control platforms (72, 74). Third, vocoders (76) are introduced at the DCS. Fourth, the cellular functions of the legacy cellular switch (10) are phased out and replaced by the ATM-based target architecture.

公开(公告)号：EP1162858A2

公开(公告)日：2001-12-12

申请号：EP01304708

申请日：2001-05-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DOSHI BHARAT TARACHAND ,  NAGARAJAN RAMESH

IPC: H04L12/56 ,  H04L12/437 ,  H04Q11/00 ,  H04Q11/04 ,  H04J3/08 ,  H04J3/16

CPC classification number: H04Q11/0478 ,  H04J2203/0032 ,  H04J2203/0053 ,  H04J2203/006 ,  H04J2203/0098 ,  H04Q11/0062 ,  H04Q2011/0081

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 one 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 restoration process is implemented using service layer switching, or a SONET/optical ring, in which case the restoration process is implemented using transport layer switching.

Abstract translation: 流量单位在相应组的中继线上的网络中的节点之间路由，使得业务在不相交路径之间平衡。 使用业务层或传输层交换实现业务的恢复过程。 在第一实施例中，第一和第二节点通过第一组和第二组中继线连接，其中一组中继中的每个中继线支持指定的一个业务单元的指定部分。 然后将业务单元路由，使得给定一个业务单元的前半部分在路由组中的给定组中的第一个中继路由，给定单元的后半部分路由 在给定的一组树干中的第二根树干上。 在其他实施例中，第一和第二节点通过第一和第二组中继线连接，以便形成四中继环，其中第一和第二组中继线中的每一个包括主干线和备用干线。 然后，给定的一个交通单元在环的上部或下部路由。 四个中继环可以是IP /光混合环的形式，在这种情况下，使用业务层交换或SONET /光环实现恢复过程，在这种情况下，使用传输层交换来实现恢复过程。