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：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。