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1.发明授权Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with descrambling 失效用于数字传输的方法和装置，其包括加扰和前向纠错，同时防止与解扰相关的位错误扩展公开(公告)号：US06349138B1
公开(公告)日：2002-02-19
申请号：US08841510
申请日：1997-04-23
申请人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
发明人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
IPC分类号： H04N7167
CPC分类号： H04L1/0057 , H04L1/0071 , H04L1/0085 , H04L12/2801 , H04L25/03866 , H04N7/173
摘要： The specification relates to a method and apparatus supporting multiple access, bi-directional data and multimedia transfer described over a hybrid fiber/coax (HFC) network, though applicable to transmissions over other media as well. The protocol associated with the present invention supports downstream broadcast transmission from headend to cable modem, and also provides for allocation of bandwidth for cable modems to transmit back to the headend. The protocol supports different access modes such as STM, ATM, and VL; within each subframe of a subframe/frame/masterframe structure. The protocol is utilized over a system which provides for forward error correction (FEC) and scrambling/descrambling, while eliminating the deleterious effects on the error correcting capability of the FEC due to the bit error spreading associated with a scrambling/descrambling function. The protocol adapts to changing demands for a mix of circuit and packet mode applications and allocates upstream and downstream bandwidth in response to the a variety of bursty and isochronous traffic sources.
摘要翻译： 本说明书涉及一种支持通过混合光纤/同轴电缆（HFC）网络描述的多路访问，双向数据和多媒体传输的方法和装置，尽管适用于其它介质上的传输。 与本发明相关联的协议支持从头端到电缆调制解调器的下行广播传输，并且还为电缆调制解调器的带宽分配提供发送回头端。 该协议支持不同的接入方式，如STM，ATM和VL; 在子帧/帧/主帧结构的每个子帧内。 该协议通过提供前向纠错（FEC）和加扰/解扰的系统来利用，同时消除由于与加扰/解扰功能相关联的比特误差扩展对FEC的纠错能力的有害影响。 该协议适应于对电路和分组模式应用的混合的不断变化的需求，并且响应于各种突发和等时业务源来分配上行和下行带宽。
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2.发明授权Method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network utilizing an adaptive digital access protocol 失效利用自适应数字接入协议，能够通过宽带通信网络实现多业务和多传输模式的多址接入的方法和装置
公开(公告)号：US6041051A
公开(公告)日：2000-03-21
申请号：US832255
申请日：1997-04-03
申请人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
发明人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
CPC分类号： H04W28/06 , H04L12/2801 , H04Q11/0478 , H04L2012/5605 , H04L2012/5606 , H04L2012/561 , H04W72/0446 , H04W72/0453 , H04W74/00 , H04W88/06
摘要： The specification relates to a broadband multiple access protocol for bi-directional hybrid fiber/coax (HFC) networks. The protocol supports downstream broadcast transmission from headend to cable modem, and also provides for allocation of bandwidth for cable modems to transmit back to the headend. Although the present invention is described in relation to an HFC network, it is also equally applicable to a cellular wireless communications environment. The protocol supports different access modes such as STM, ATM, and VL; within each subframe of a subframe/frame/masterframe structure. The protocol adapts to changing demands for a mix of circuit and packet mode applications and allocates upstream and downstream bandwidth in response to the a variety of bursty and isochronous traffic sources. In order to satisfy the quality of service requirements of varied applications, while maintaining high bandwidth efficiency, the protocol utilizes a subframe structure with subframe partitioning into regions; one region dedicated to STM payload transmission, a second region dedicated to ATM cell transmission, and a third region dedicated to VL payload transmissions.
摘要翻译： 该规范涉及用于双向混合光纤/同轴（HFC）网络的宽带多址协议。 该协议支持从头端到电缆调制解调器的下行广播传输，并且还为电缆调制解调器的带宽分配提供发送回头端。 虽然关于HFC网络描述了本发明，但是它也同样适用于蜂窝式无线通信环境。 该协议支持不同的接入方式，如STM，ATM和VL; 在子帧/帧/主帧结构的每个子帧内。 该协议适应于对电路和分组模式应用的混合的不断变化的需求，并且响应于各种突发和等时业务源来分配上行和下行带宽。 为了满足各种应用的服务质量要求，在保持高带宽效率的同时，协议利用子帧结构，将子帧划分到区域中; 专用于STM有效载荷传输的一个区域，专用于ATM信元传输的第二区域和专用于VL有效载荷传输的第三区域。
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3.发明授权Method and apparatus for transmission of asynchronous, synchronous, and variable length mode protocols multiplexed over a common bytestream 失效用于传输通过公共字节流复用的异步，同步和可变长度模式协议的方法和装置
公开(公告)号：US5936965A
公开(公告)日：1999-08-10
申请号：US874651
申请日：1997-06-13
CPC分类号： H04J3/1682 , H04Q11/0478 , H04J2203/0089 , H04L2012/5672
摘要： The specification relates to a system supporting the transmission of multiple protocols over a single bytestream. The multiple protocol types supported include asynchronous transfer mode (ATM) protocol data units (PDUs), synchronous transfer mode (STM) PDUs, and variable length (VL) PDUs, as well as subtypes included within the aforementioned multiple protocol types. PDUs from higher layers are processed at three intermediate protocol layers where application layer PDUs are prepared, segmented, and repacked as asynchronous block multiplexing (ABM) PDUs. ABM PDUs include a type identification field. Cyclical redundancy checks and other error detection/correction techniques are optionally supported. ABM PDUs are multiplexed within a multiple protocol bytestream. Multiple protocol bytestream support is provided between a transmitter and receiver over a plurality of mediums, including but not limited to coaxial cable, wireless, optical fiber, hybrid fiber/coax, satellite, and twisted pair. Despite the various modes, protocols, PDU lengths, and different quality of service (QOS) requirements, support is provided over a common bytestream with a common physical layer datalink in either a point-to-point or broadcast environment.
摘要翻译： 该规范涉及支持通过单个字节流传输多个协议的系统。 支持的多种协议类型包括异步传输模式（ATM）协议数据单元（PDU），同步传输模式（STM）PDU和可变长度（VL）PDU，以及包括在上述多种协议类型内的子类型。 来自较高层的PDU在三个中间协议层处理，其中应用层PDU被准备，分段和重新包装为异步块复用（ABM）PDU。 ABM PDU包括一个类型识别字段。 可选地支持循环冗余校验和其他错误检测/校正技术。 ABM PDU在多协议字节流内复用。 在多个介质上的发射机和接收机之间提供多协议字节流支持，包括但不限于同轴电缆，无线，光纤，混合光纤/同轴电缆，卫星和双绞线。 尽管有各种模式，协议，PDU长度以及不同的服务质量（QOS）要求，但是通过一个公共的字节流与点对点或广播环境中的通用物理层数据链路提供支持。
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4.发明授权Method and apparatus enabling synchronous transfer mode, variable length and packet mode access for multiple services over a broadband communication network 失效通过宽带通信网络实现多个服务的同步传输模式，可变长度和分组模式接入的方法和装置
公开(公告)号：US6055242A
公开(公告)日：2000-04-25
申请号：US812469
申请日：1997-03-06
申请人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
发明人： Bharat Tarachand Doshi , Subrahmanyam Dravida , George John Kustka , Peter D. Magill , Curtis A. Siller , Kotikalapudi Sriram
CPC分类号： H04N21/6118 , H04J3/1694 , H04L12/2801 , H04N21/6168 , H04N7/17309
摘要： The specification relates to a broadband multiple access protocol for bi-directional hybrid fiber/coax (HFC) networks. The protocol supports downstream broadcast transmission from headend to cable modem, and also provides for allocation of bandwidth for cable modems to transmit back to the headend. Although the present invention is described in relation to an HFC network, it is also equally applicable to a wireless communications environment. The protocol supports different access modes such as synchronous transfer mode, asynchronous transfer mode, and variable length data. The protocol adapts to changing demands for a mix of circuit and packet mode applications and allocates upstream and downstream bandwidth in response to the a variety of bursty and isochronous traffic sources. In order to satisfy the quality of service requirements of varied applications, while maintaining high bandwidth efficiency, the protocol utilizes a frame structure with frame partitioning into regions; one region dedicated to STM payload and asynchronous, second region dedicated to ATM and VL payloads, messaging and control.
摘要翻译： 该规范涉及用于双向混合光纤/同轴（HFC）网络的宽带多址协议。 该协议支持从头端到电缆调制解调器的下行广播传输，并且还为电缆调制解调器的带宽分配提供发送回头端。 虽然本发明是关于HFC网络进行描述的，但也可应用于无线通信环境。 该协议支持不同的访问模式，如同步传输模式，异步传输模式和可变长度数据。 该协议适应于对电路和分组模式应用的混合的不断变化的需求，并且响应于各种突发和等时业务源来分配上行和下行带宽。 为了满足各种应用的服务质量要求，在保持高带宽效率的同时，协议利用帧分区的帧结构， 一个专用于STM有效载荷的区域和专用于ATM和VL有效载荷的异步，第二区域，消息和控制。
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公开(公告)号：US07502361B2
公开(公告)日：2009-03-10
申请号：US10345034
申请日：2003-01-15
IPC分类号： H04J3/24
CPC分类号： H04L29/12311 , H04L1/1664 , H04L1/1812 , H04L61/2084 , H04L67/322 , H04L69/324 , H04L69/325 , H04L69/329 , H04L69/40 , H04W74/00 , H04W80/00
摘要： A new protocol layer is provided as part of a protocol stack associated with a packet-based multiaccess mobile communications system. The protocol layer is preferably located above a medium access control (MAC) protocol layer and a physical protocol layer of the system and below a transport/network protocol layer. Such a subnetwork protocol layer provides, inter alia, the communications system with various mobility management functions, for example, tracking mobile user stations throughout the system, mobile station access to the system, and connection/call continuity within the system. The subnetwork protocol layer of the invention also performs packet routing functions associated with the system. Routing can be accomplished in many ways, for example, via source routing, connectionless routing, or tunneling. Further, the new protocol layer of the invention is preferably located above a data link layer with respect to the protocol stack associated with communications between network nodes.
摘要翻译： 作为与基于分组的多访问移动通信系统相关联的协议栈的一部分提供了新的协议层。 协议层优选地位于媒体访问控制（MAC）协议层和系统的物理协议层之上，并位于传输/网络协议层之下。 这样的子网协议层尤其提供具有各种移动性管理功能的通信系统，例如，跟踪整个系统中的移动用户站，移动台对系统的访问以及系统内的连接/呼叫连续性。 本发明的子网协议层还执行与系统相关联的分组路由功能。 可以通过许多方式实现路由，例如，通过源路由，无连接路由或隧道。 此外，本发明的新协议层优选地相对于与网络节点之间的通信相关联的协议栈位于数据链路层之上。
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公开(公告)号：US6160804A
公开(公告)日：2000-12-12
申请号：US191134
申请日：1998-11-13
CPC分类号： H04W8/082 , H04L29/12009 , H04L29/12047 , H04L29/12801 , H04L61/15 , H04L61/6004 , H04L69/16 , H04L69/161 , H04L69/164 , H04W80/04
摘要： Various methodologies and related apparatus associated with mobility management issues within a packet-based multiaccess mobile communications system, which includes a plurality of mobile user stations and a plurality of network nodes, are provided. Location management techniques include tracking and/or locating mobile stations within the system. The invention makes use of home and visiting location registers in which information such as mobile station addresses and/or host names associated with mobile stations are stored. Mobile access methodologies include a complete mobile access method and a direct mobile access method. The former allows a mobile station to preferably include a unique address in the packets being transmitted, while the latter allows the station to merely use the host name of the destination station. The invention also includes various in-call mobility management techniques, including handoffs, which make use of the concept of an anchor.
摘要翻译： 提供了包括多个移动用户站和多个网络节点的基于分组的多接入移动通信系统内与移动性管理问题相关联的各种方法和相关设备。 位置管理技术包括跟踪和/或定位系统内的移动台。 本发明利用存储与移动台相关联的诸如移动站地址和/或主机名称的信息的归属和访问位置寄存器。 移动接入方法包括完整的移动接入方法和直接移动接入方法。 前者允许移动台优选地在正被发送的分组中包括唯一的地址，而后者允许站仅使用目的站的主机名。 本发明还包括使用锚的概念的各种呼叫移动性管理技术，包括切换。
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公开(公告)号：US5936967A
公开(公告)日：1999-08-10
申请号：US757208
申请日：1996-11-27
申请人： John H. Baldwin , Behram Homi Bharucha , Bharat Tarachand Doshi , Subrahmanyam Dravida , Sanjiv Nanda
发明人： John H. Baldwin , Behram Homi Bharucha , Bharat Tarachand Doshi , Subrahmanyam Dravida , Sanjiv Nanda
CPC分类号： H04Q11/0478 , H04L2012/5607 , H04L2012/5652 , H04L2012/5672
摘要： A method and apparatus for transmitting and/or receiving variable-length packets (e.g., CDMA packets, CDPD packets) that are associated with different channels and which are multiplexed via a single virtual circuit (e.g., an ATM virtual circuit).
摘要翻译： 用于发送和/或接收与不同信道相关联并且经由单个虚拟电路（例如，ATM虚拟电路）复用的可变长度分组（例如，CDMA分组，CDPD分组）的方法和装置。
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公开(公告)号：US5729536A
公开(公告)日：1998-03-17
申请号：US630147
申请日：1996-04-10
申请人： Bharat Tarachand Doshi , Subrahmanyam Dravida , Richard Paul Ejzak , Sanjiv Nanda , Anil Sawkar , Philip Andrew Treventi
发明人： Bharat Tarachand Doshi , Subrahmanyam Dravida , Richard Paul Ejzak , Sanjiv Nanda , Anil Sawkar , Philip Andrew Treventi
CPC分类号： H04W88/181 , H04L49/255 , H04L49/3081 , H04Q11/0478 , H04L2012/5607 , H04L2012/5619 , H04L2012/5639
摘要： 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.
摘要翻译： 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的基础设施。 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，在无线端口引入ATM，呼叫控制功能迁移到新的基于ATM的呼叫控制平台。 第三，在DCS中引入声码器。 第四，传统蜂窝交换机的蜂窝功能被淘汰，并被基于ATM的目标架构所取代。
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公开(公告)号：US06747961B1
公开(公告)日：2004-06-08
申请号：US09547262
申请日：2000-04-11
IPC分类号： H04Q700
CPC分类号： H04W8/082 , H04L29/12009 , H04L29/12047 , H04L29/12801 , H04L61/15 , H04L61/6004 , H04L69/16 , H04L69/161 , H04L69/164 , H04W80/04
摘要： Various methodologies and related apparatus associated with mobility management issues within a packet-based multiaccess mobile communications system, which includes a plurality of mobile user stations and a plurality of network nodes, are provided. Location management techniques include tracking and/or locating mobile stations within the system. The invention makes use of home and visiting location registers in which information such as mobile station addresses and/or host names associated with mobile stations are stored. Mobile access methodologies include a complete mobile access method and a direct mobile access method. The former allows a mobile station to preferably include a unique address in the packets being transmitted, while the latter allows the station to merely use the host name of the destination station. The invention also includes various in-call mobility management techniques, including handoffs, which make use of the concept of an anchor.
摘要翻译： 提供了包括多个移动用户站和多个网络节点的基于分组的多接入移动通信系统内与移动性管理问题相关联的各种方法和相关设备。 位置管理技术包括跟踪和/或定位系统内的移动台。 本发明利用存储与移动台相关联的诸如移动站地址和/或主机名称的信息的归属和访问位置寄存器。 移动接入方法包括完整的移动接入方法和直接移动接入方法。 前者允许移动台优选地在正被发送的分组中包括唯一的地址，而后者允许站仅使用目的站的主机名。 本发明还包括使用锚的概念的各种呼叫移动性管理技术，包括切换。
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公开(公告)号：US6073248A
公开(公告)日：2000-06-06
申请号：US960462
申请日：1997-10-29
CPC分类号： H04Q11/0062 , H04J14/0227 , H04J14/0241 , H04J14/0278 , H04J14/0284 , H04Q2011/0086
摘要： Distributed precomputation techniques for determining primary and/or restoration paths in an optical network. The invention provides a number of partially and fully asynchronous distributed precomputation algorithms which may be implemented, for example, by the nodes of an all-optical network, in which network links are constrained in terms of optical signal wavelength and failure isolation. A given distributed precomputation algorithm may include a first phase in which paths are allocated for capacity demands to the extent possible without resolving contentions, and a second phase in which contentions between demands for the same capacity are resolved. The first phase may implement a contention locking mechanism which locks a primary path of a given demand to prevent other demands from contending for the same capacity, and a link capacity control mechanism which involves storing a link status table at one or more nodes, the link status table listing a number of specific failures and demands which are affected by the failures. The second phase of the distributed precomputation algorithm reroutes paths previously allocated to one or more demands in order to free up capacity required for another demand, so as to optimize overall network capacity utilization.
摘要翻译： 用于确定光网络中的主路径和/或恢复路径的分布式预计算技术。 本发明提供了许多部分和完全异步的分布式预计算算法，其可以例如由全光网络的节点来实现，其中网络链路在光信号波长和故障隔离方面受到约束。 给定的分布式预计算算法可以包括第一阶段，在第一阶段中，在不解决争用的情况下尽可能地分配用于容量需求的路径，以及解决相同容量的需求之间的争用的第二阶段。 第一阶段可以实施争用锁定机制，其锁定给定需求的主要路径以防止其他需求竞争相同的容量;以及链路容量控制机制，其涉及将链路状态表存储在一个或多个节点处，所述链路 状态表列出了受到故障影响的一些具体故障和需求。 分布式预先计算算法的第二阶段重新路由先前分配给一个或多个需求的路径，以便释放另一个需求所需的容量，从而优化整体网络容量利用率。
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