公开(公告)号：EP0801513A1

公开(公告)日：1997-10-15

申请号：EP97302402.9

申请日：1997-04-08

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Doshi, Bharat Tarachand ,  Ejzak, Richard Paul ,  Dravida, Subrahmanyam ,  Nanda, Sanjiv ,  Sawkar, Anil ,  Treventi, Philip Andrew

IPC: H04Q11/04

CPC classification number: H04W88/181 ,  H04L49/255 ,  H04L49/3081 ,  H04L2012/5607 ,  H04L2012/5619 ,  H04L2012/5639 ,  H04Q11/0478

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.

Abstract translation: 提出了四个阶段的数字蜂窝架构，其重用了大量现有的语音基础设施，同时允许在行业标准，低成本平台上优雅地引入数据和集成语音/数据服务。 首先，引入了支持数据服务的单独的基于ATM的基础架构（46）。 在面向对象和模块化编程的行业标准硬件平台上引入了新的数据呼叫控制。 第二，在无线端口（68）引入ATM，呼叫控制功能被迁移到新的基于ATM的呼叫控制平台（72,74）。 第三，在DCS处引入声码器（76）。 第四，传统蜂窝交换机（10）的蜂窝功能被淘汰，并由基于ATM的目标架构代替。

公开(公告)号：EP1005194A2

公开(公告)日：2000-05-31

申请号：EP99309124.8

申请日：1999-11-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Benmohamed, Lotfi ,  Dravida, Subrahmanyam ,  Harshavardhana, Paramasiviah ,  Lau, Wing Cheong ,  Mittal, Ajay Kumar

IPC: H04L12/24 ,  H04L12/56

CPC classification number: H04L41/5025 ,  H04L41/0823 ,  H04L41/145 ,  H04L41/5003 ,  H04L45/00

Abstract: Methods and apparatus are provided for designing IP networks with substantially improved performance as compared to existing IP networks such as, for example, those networks designed under best-effort criteria. Particularly, the invention includes methods and apparatus for: computing worst-case and optimistic link capacity requirements; optimizing network topology; and determining router placement within a network.

Abstract translation: 提供了用于具有基本上改进的性能设计的IP网络相比于现有的IP网络的方法和装置：如，例如，那些网络下设计尽力而为标准。 具体地说，本发明包括的方法和设备：计算最坏情况和乐观的链路容量的要求; 优化网络拓扑; 以及网络中的确定性采矿路由器放置。

公开(公告)号：EP0942569A3

公开(公告)日：1999-10-13

申请号：EP99301555.1

申请日：1999-03-02

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Doshi, Bharat Tarachand ,  Dravida, Subrahmanyam ,  Hernandez-Valencia, Enrique ,  Matragi, Wassim A. ,  Qureshi, Muhammed Akber

IPC: H04L29/06

CPC classification number: H04L1/0083 ,  H04L1/0061 ,  H04L7/048 ,  H04L29/06 ,  H04L69/22 ,  H04L69/324 ,  H04L2012/5652 ,  H04L2012/5674 ,  H04Q11/0478

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 mode when performing synchronization, and a normal mode when synchronization has been accomplished.

Abstract translation: 定义了一种简单的点对点数据链路协议（SDL），该协议基于使用长度指示符字段和错误检查字段而不是标志来执行接收方中的分组边界恢复。 在本发明的一个实施例中，SDL发送器发送包括头部和可变长度有效载荷的SDL分组。 SDL头部包括长度指示符（LI）字段，类型字段和循环冗余校验（CRC）字段。 为了接收这些传输的SDL数据包，SDL支持在接收器中使用自同步/自描绘技术。 接收机根据LI字段执行自我描述，并且根据LI字段和报头CRC字段执行自同步或分组恢复。 具体而言，在执行分组恢复中，接收机对每个接收到的SDL分组报头执行CRC校验，并在N次正确校验之后声明同步，例如N = 4。SDL接收机在执行同步时以寻线模式操作， 模式，当同步完成时。

公开(公告)号：EP0909051A2

公开(公告)日：1999-04-14

申请号：EP98308085.4

申请日：1998-10-05

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Anderson, Jon ,  Dravida, Subrahmanyam ,  Doshi, Bharat Tarachand ,  Hernandez-Valencia, Enrique ,  Krishnaswamy, Murali ,  Manchester James S.

IPC: H04J3/14 ,  H04L25/03 ,  H04J3/06

CPC classification number: H04J3/1617 ,  H04J3/0623 ,  H04J2203/0076 ,  H04J2203/0083 ,  H04J2203/0089 ,  H04L25/03828 ,  H04L29/06

Abstract: A simplified data link protocol which may be implemented in a very high-speed transmission system, e.g., SONET, processes a datagram received from an IP facility according to QoS considerations and scrambles a datagram before it is again scrambled by a transmission system, e.g., a SONET transmitter, to ensure that the pattern of a user's data does not match the transmission scrambling pattern. The data link protocol scrambler also employs a novel synchronization scheme. We also use a pointer system which identifies the location of a datagram in a frame to eliminate flags and the need to process user data to ensure that it does not contain and a boundary flag.

Abstract translation: 可以在非常高速的传输系统（例如SONET）中实现的简化的数据链路协议根据QoS考虑处理从IP设施接收的数据报，并且在数据报再次被传输系统加扰之前进行加扰，例如， SONET发射机，以确保用户数据的模式与传输加扰模式不匹配。 数据链路协议扰频器也采用新颖的同步方案。 我们还使用一个指针系统来识别帧中数据报的位置，以消除标志，并且需要处理用户数据以确保它不包含边界标志。

公开(公告)号：EP0942569A2

公开(公告)日：1999-09-15

申请号：EP99301555.1

申请日：1999-03-02

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Doshi, Bharat Tarachand ,  Dravida, Subrahmanyam ,  Hernandez-Valencia, Enrique ,  Matragi, Wassim A. ,  Qureshi, Muhammed Akber

IPC: H04L29/06

CPC classification number: H04L1/0083 ,  H04L1/0061 ,  H04L7/048 ,  H04L29/06 ,  H04L69/22 ,  H04L69/324 ,  H04L2012/5652 ,  H04L2012/5674 ,  H04Q11/0478

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 mode when performing synchronization, and a normal mode when synchronization has been accomplished.

Abstract translation: 定义了一种简单的点对点数据链路协议（SDL），其基于使用长度指示符字段和错误检查字段而不是用于在接收器中执行分组边界恢复的标志。 在本发明的实施例中，SDL发射机发送包括报头和可变长度有效载荷的SDL分组。 SDL头包括长度指示符（LI）字段，类型字段和循环冗余校验（CRC）字段。 为了接收这些发送的SDL分组，SDL支持在接收机中使用自同步/自描述技术。 接收机根据LI字段执行自描述，并且作为L1字段和头CRC字段的函数执行自同步或分组恢复。 特别地，在执行分组恢复时，接收机对每个接收到的SDL分组报头执行CRC校验，并且在N次正确检查之后声明同步，例如N = 4。当执行同步时，SDL接收机以寻线模式操作，并且正常 同步完成后的模式。

公开(公告)号：EP0872983A1

公开(公告)日：1998-10-21

申请号：EP98302766.5

申请日：1998-04-08

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Baldwin, John Henry ,  Dravida, Subrahmanyam ,  Doshi, Bharat Tarachand ,  Jiang, Hong ,  Matragi, Wassim A. ,  Nanda, Sanjiv

IPC: H04L12/56 ,  H04Q11/04

CPC classification number: H04L49/253 ,  H04L49/105 ,  H04L49/20 ,  H04L49/3009 ,  H04L49/55 ,  H04L2012/5607 ,  H04L2012/561 ,  H04L2012/5615 ,  H04L2012/5656 ,  H04Q11/0478

Abstract: A digital cellular/personal communications service (PCS) application incorporates a logical link connection (LLC) server. In this approach, there are two ATM connections in the path of an AAL-2 connection: one between a base station and the LLC Server and the other between the LLC Server and a vocoder group. All LLCs from, or to, a given 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 LLC Server and a particular vocoder group are used to maximum capacity notwithstanding each ATM connection conveys LLCs to different LLC endpoints.

Abstract translation: 数字蜂窝/个人通信服务（PCS）应用包括逻辑链路连接（LLC）服务器。 在这种方法中，在AAL-2连接的路径中有两个ATM连接：一个在基站和LLC服务器之间，另一个在LLC服务器和声码器组之间。 来自或给予基站的所有LLC使用公共ATM连接，而与另一端使用的声码器无关。 类似地，来自或给定的声码器组的所有LLC使用公共ATM连接，而不管另一端的目的地基站如何。 在LLC服务器上，来自许多同一个声码器组的基站的LLC数据包被提取并捆绑在LLC服务器和目的声码器组之间的ATM连接中。 对来自声码器并发往基站的分组进行类似的处理。 因此，尽管每个ATM连接将LLC传送到不同的LLC端点，但是使用特定基站和LLC服务器之间的每个ATM连接以及LLC服务器和特定声码器组之间的每个ATM连接来实现最大容量。