公开(公告)号：EP0746123A1

公开(公告)日：1996-12-04

申请号：EP96108119.7

申请日：1996-05-22

申请人： DEUTSCHE THOMSON-BRANDT GMBH

发明人： Streckenbach, Wulf-Christian

IPC分类号： H04J3/06 ,  H03M13/00 ,  H04L7/04

CPC分类号： H03M13/096 ,  H04L7/048 ,  H04L2012/5673 ,  H04L2012/5674 ,  H04Q11/0478

摘要： Durch die Erfindung wird mit geringem Schaltungsaufwand wiederholt eine schnelle Bestimmung der Prüfsumme ermöglicht.
Bei Ungleichheit zwischen einer aus Informationsdaten eines Datenblocks ermittelten Prüfsumme und einem im Datenblock enthaltenen Vergleichswert wird mit jedem weiteren Takt eine neue Prüfsumme gewonnen, indem nur die in Vorberechnungen in Abhängigkeit eines gewählten Generatorpolynoms als änderungsfähig ermittelten Bit der vorangehenden Prüfsumme ausgewählt und zur Bildung der neuen Prüfsumme mit dem zuerst gesendeten Bit des jeweils vorangehenden Datenblocks logisch verknüpft werden.
Anwendbar zum Auffinden eines ATM (Asynchron Transmission Mode)-Zellenanfangs bei Breitband-ISDN-Netzwerken.

摘要翻译： 该方法提供了包含随后的测试和字段数据的信息的接收的数据块的检验总和的验证。 测试总和是在从数据的发送结束信息形成。 形成测试总和，n中的信息数据的连续位形成第n-1次的多项式。 多项式由XM是倍增的。 所得到的产物是n-1 +米度。 这是通过生成多项式G（X）分割模2。 该除法的余数被以恒定作为测试总和到测试总和字段一起插入。 在接收端，数据块的数量的连续比特进行了分析，其中来自第一n连续比特中，测试总和导出gemäß到相同的形成过程。 这是通过被包含在剩余的连续比特的比较值相比所有。 虽然有派生测试总和和所述比较值之间的差，与每个时钟脉冲另外一个新的测试总和获得。 在此只能够改变并取决于所选择的生成多项式先前和检验的位被选中。 这些被逻辑地组合，以形成与前一数据块的第一个反式mitted位新的测试总和。

公开(公告)号：EP0681381A1

公开(公告)日：1995-11-08

申请号：EP94480036.6

申请日：1994-05-06

申请人： International Business Machines Corporation

发明人： Galand, Claude ,  Spagnol, Victor ,  Saint-Georges, Eric

IPC分类号： H04L1/00 ,  H03M13/00 ,  H04L7/04 ,  H04L12/56

CPC分类号： H03M13/093 ,  H04L1/0083 ,  H04L7/048 ,  H04L12/56 ,  H04L2012/5673 ,  H04L2012/5674

摘要： A method and an apparatus to calculate in an intermediate node of a communication network, the new Frame Check Sequence (FCS) appended to a data bits message which has been modified in said intermediate network node. The invention is useful for high speed networks where the transit delay needs to be optimized in the network along with the computing resources in the intermediate network nodes in terms of computer cycles and memory size.
The invention consists in calculating the difference between the FCS using the difference between the modified fields in the message and the distance in bits between the end of the modified field and the end of the message; the calculation consists in differentiating 'short messages' in the data flow and to provide an optimized processing for the short messages, the processing for larger messages being based on this first optimized processing.
The calculation of the modified FCS comprises operations on polynomials whose coefficients belong to the Galois's Field and whose degree is limited to the one of the polynomial generator of the corresponding CRC code. The calculations include also look up operations in tables limited in size. The choice between the possible implementations (full software, full hardware and mixed hardware and software with the usage of a Remult operator for the last two) will depend on the kind of the network (Frame Relay or other network) and the capacity of the intermediate network node.

摘要翻译： 的方法和设备，以在通信网络的中间节点计算，追加到已在所述中间网络节点被修改一个数据比特消息的新的帧校验序列（FCS）。 本发明是用于高速网络，其中所述传送延迟需要将网络地连同在中间网络节点的计算资源在计算机周期和内存大小方面进行优化是有用的。 本发明besteht在计算使用该消息中的修改的字段，并在修改后的字段和消息的结束的端部之间的位距离之间的差的FCS之间的差; 在数据流并且提供到优化处理的短消息区分“短消息”的计算besteht，对于较大的消息的处理是基于该第一优化处理。 修改后的FCS包括操作对多项式的系数属于伽罗瓦的场和谁程度仅限于相应的CRC码的生成多项式的一个计算。 因此，计算包括在大小限制表查找操作。 在可能的实施方式之间的选择（全软件，全硬件和混合的硬件和软件具有用于Remult操作者的使用负载2）将取决于种类网络（帧中继或其它网络）的和中间的容量 网络节点。

公开(公告)号：EP0660570A2

公开(公告)日：1995-06-28

申请号：EP94308656.1

申请日：1994-11-23

申请人： AT&T Corp.

发明人： van Ooijen, Gijsbertus Gerardus ,  Verbeek, Robert Jacobus Marie

IPC分类号： H04L29/06 ,  H04Q11/04

CPC分类号： H04Q11/0478 ,  H04L2012/561 ,  H04L2012/5673 ,  H04L2012/5687 ,  H04Q3/0016

摘要： The present invention provides a telecommunication network utilizing a passive optical network connecting a plurality of network terminations to a local exchange. Information cells and commands are transmitted on the network by the local exchange to all the network terminations. The information cells and commands contain routing address information for the particular network termination to which the information cell or command is destined. The address information contains the address of the destination network termination and additional identifier bits to facilitate encryption of the address information for security and privacy of traffic behavior without producing misdelivery occurrences. In addition, a system for repeatedly changing encryption patterns for the network terminations which detects misdelivery conditions is provided.

摘要翻译： 本发明提供了一种电信网络利用网络终端的多个连接到本地交换机的无源光网络。 信息细胞和命令是网络本地交换机到所有的网络终端上的反式mitted。 信息单元和命令包含用于网络终端尤其涉及信息细胞或命令的目的地路由地址信息。 地址信息包含目的地网络终端和附加标识位的地址，以促进安全和交通行为的私密性地址信息加密，而不会产生误投事件。 此外，提供了一种用于重复改变加密图形的网络终端，其检测错误递送条件的系统。

公开(公告)号：EP0821852B1

公开(公告)日：2003-01-22

申请号：EP95916662.0

申请日：1995-04-15

申请人： International Business Machines Corporation

发明人： ENGBERSEN, Antonius Paulus ,  HERKERSDORF, Andreas ,  LEMPPENAU, Wolfram ,  SCHINDLER, Hans Rudolf

IPC分类号： H04J3/16 ,  H04L25/03

CPC分类号： H04J3/1617 ,  H04J2203/0096 ,  H04L25/03866 ,  H04L2012/5672 ,  H04L2012/5673 ,  H04Q11/0478 ,  Y10S370/907

摘要： A modular approach to the mapping of data in and from a standard SDH/SONET signal is described. A module has interfaces (T0 - T8) which allows to connect it to other of its kind and thereby achieving higher data rates, i.e. access to standard signals of higher levels. By choosing among different interconnection schemes, arrangements comprising a plurality of modules are also able to support concatenated data traffic.

摘要翻译： 描述了标准SDH / SONET信号中数据映射的模块化方法。 一个模块具有接口（T0-T8），允许将其连接到其他类型的接口，从而实现更高的数据速率，即访问更高级别的标准信号。 通过在不同的互连方案中进行选择，包括多个模块的配置也能够支持连接的数据业务。

公开(公告)号：EP1166489A1

公开(公告)日：2002-01-02

申请号：EP00921208.5

申请日：2000-03-10

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： SIHLBOM, Björn, Ulf, Anders

IPC分类号： H04L7/04

CPC分类号： H04L7/041 ,  H04L5/0048 ,  H04L7/027 ,  H04L7/046 ,  H04L27/2613 ,  H04L27/2655 ,  H04L2012/5607 ,  H04L2012/5673 ,  H04Q11/0478

摘要： A method for discrimination of repetitive sequences in a wireless communication system in which the repetitive sequences have the same repetition length. For the discrimination the repetitive sequences are modified by changing the phase of at least one of the sequences. The auto-correlation values of the repetition sequences and of the modified repetitive sequences are calculated and the auto-correlation signs of the repetition sequences and of the modified sequences are compared.

公开(公告)号：EP1064819A1

公开(公告)日：2001-01-03

申请号：EP99914845.5

申请日：1999-03-19

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： LARSSON, Peter ,  LARSSON, Mikael

IPC分类号： H04Q11/04

CPC分类号： H04L49/108 ,  H04L2012/5616 ,  H04L2012/5647 ,  H04L2012/5652 ,  H04L2012/5673 ,  H04Q11/0478

摘要： In a wireless telecommunications network, transporting identification information, such as access point identifier (AP ID) and wireless terminal identifier (WT ID) information, in each uplink and each downlink protocol data unit (PDU) being transmitted between a sender and a receiver, without increasing bandwidth requirements. This is accomplished by modifying each PDU as a function of a first identification vector, prior to transmission, wherein the first identification vector reflects, for example, the AP ID and the corresponding WT ID. At the receiver, the PDU is re-modified as a function of a second identification vector, wherein the second identification vector reflects an expected AP ID and WT ID. If the receiver is the intended recipient of the PDU, the first and second identification vectors will be the same, and the process of re-modifying the PDU merely serves to restore the original value of the PDU. The receiver can detect whether the original value of the PDU has been restored through a data integrity check, for example, one which employs a cyclic redundancy code (CRC). The result can then be used to determine whether the receiver is, in fact, the intended receiver, and whether the receiver should decode the PDU or discard it.

公开(公告)号：EP1026915A2

公开(公告)日：2000-08-09

申请号：EP00101632.8

申请日：2000-01-31

申请人： TRW Inc.

发明人： Wright, David A. ,  Caso, Gregory S. ,  Linsky, Stuart T.

IPC分类号： H04Q11/04

CPC分类号： H04Q11/0478 ,  H04L2012/5647 ,  H04L2012/5673

摘要： A method and apparatus for enhancing the cell error ratio and the cell misinsertion rate for a given cell loss ratio is provided. A predetermined number, C, of ATM cells (150, 250) are packed together and encoded using a strong t-error correcting BCH block code, such as a Reed-Solomon code to produce an encoded block (162, 262). After transmission, the received data segment (156, 256) may include s errors. The data segment (156, 256) is decoded, and if s > t, decoder failure occurs with very high probability and the data segment is discarded. The CER obtained is superior to present ATM systems. The decoded block is unpacked into C ATM cells (160, 260). Optionally, the header fields (164, 264) of the C ATM cells may be decoded. In most cases where errors are present in the header, nonzero syndrome occurs with high probability, and the C ATM cells (160, 260) are discarded. The CMR obtained is superior to present ATM systems. The delivered ATM cells (160, 260) are virtually error free with very high certainty.

摘要翻译： 本发明提供一种用于增强对于给定的信元丢失率的单元错误率和小区误插入率的方法和装置。 预定数目，C，ATM信元（150，250）的挤在一起，使用强叔纠错BCH码块，：诸如Reed-Solomon码编码的块（162，262），以产生编码。 传输之后，接收的数据段（156，256）可包括s-错误。 数据段（156，256）进行解码，并且如果s> T，解码器失败的具有非常高的概率发生，并且该数据段被丢弃。 获得的CE优于目前ATM系统。 经解码的块进行解包成C的ATM信元（160，260）。 OPTIONALLY，将C的ATM信元的报头字段（164，264）可被解码。 在错误存在于报头大多数情况下，非零综合征以高概率发生，且C的ATM信元（160，260）被丢弃。 获得的CMR优于目前ATM系统。 所传递的ATM信元（160，260）是几乎自由具有非常高的确定性错误。

公开(公告)号：EP1025729A2

公开(公告)日：2000-08-09

申请号：EP98949015.6

申请日：1998-10-16

申请人： Nokia Networks Oy

发明人： KOISTINEN, Tommi ,  SUVANEN, Jyri

IPC分类号： H04Q7/30

CPC分类号： H04W88/181 ,  H04L49/3081 ,  H04L2012/5607 ,  H04L2012/5673 ,  H04Q11/0478

摘要： The present invention relates to a mobile communication system which comprises a base station (BTS1) having a data transmission connection to a mobile services switching centre (MSC) through a transcoder unit (TRCU). In order to improve the data transmission connection between the base station and the transcoder unit, the data transmission connection in question is partly composed of a packet-switched data transmission connection (4) to which a converter means (3) is arranged comprising means for converting the TRAU frame received into a packet to be transmitted over the packet-switched connection (4), the conversion including the removal of bits included in the TRAU frame and not needed on the packet-switched connection (4).

公开(公告)号：EP1008275A1

公开(公告)日：2000-06-14

申请号：EP97946005.2

申请日：1997-12-12

申请人： NORTEL NETWORKS CORPORATION

发明人： TELLO, Antonio, G. ,  HUI, Margaret ,  HOLMES, Kim

IPC分类号： H04Q11/04 ,  H04L12/22

CPC分类号： H04L63/0272 ,  G06Q20/102 ,  G06Q20/40 ,  H04L12/14 ,  H04L12/1403 ,  H04L12/1471 ,  H04L12/1492 ,  H04L12/4641 ,  H04L29/06 ,  H04L2012/5615 ,  H04L2012/5616 ,  H04L2012/5619 ,  H04L2012/5639 ,  H04L2012/5673 ,  H04M15/08 ,  H04M2215/62 ,  H04Q11/0478

摘要： A virtual private network service provider is used to transfer data over a data network to a final destination, with third-party billing. The method comprises the steps of: prompting the user at a data terminal to select a destination, password, and call type; sending a set-up message to the data network; selecting a virtual private network provider through the data network; the virtual private network provider giving an encryption key to the user, and then prompting the user for a password and a user identification; encrypting the password, and sending the user identification and the encrypted password to the virtual private network provider; the virtual private network provider decrypting the encrypted password, and verifying the password; the virtual private network provider providing an authorization code; and the data terminal transferring the data through the data network to the final destination, using the authorization code.

公开(公告)号：EP0844803A3

公开(公告)日：1999-12-29

申请号：EP97308624.2

申请日：1997-10-29

申请人： AT&T Corp.

发明人： Eakins, Richard Courtney ,  Newman, Cheryl F. ,  Toth, Ronald W. ,  Wu, Fang

IPC分类号： H04Q11/04 ,  H04J3/06

CPC分类号： H04L12/5602 ,  H04L2012/5615 ,  H04L2012/5632 ,  H04L2012/5672 ,  H04L2012/5673 ,  H04Q11/0478

摘要： A communications system is provided which supports asynchronous transfer mode (ATM) communications. An ATM multiplexer is located at a customer's premises and connected to customer premises voice and data equipment. A central office ATM multiplexer is connected to various different networks in the existing network infrastructure. The central office ATM multiplexer is preferably connected to networks such as a low-speed packet-switched network, a public circuit-switched network, a private line network, and a high-speed packet-switched network. The ATM multiplexer located at the customer premises preferably supports dynamic bandwidth allocation. Additional features provided by the communications system include the ability to provide different voice encoding schemes for different users based on calling party or called party information.