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11. 发明授权

US6055242A Method and apparatus enabling synchronous transfer mode, variable length and packet mode access for multiple services over a broadband communication network 失效
标题翻译：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
IPC分类号： H04J3/16 , H04L12/28 , H04N7/173 , H04N21/61 , H04J3/24 , H04L12/43
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。

12. 发明授权

US07170893B2 Technique for selecting the number of packets to be concatenated 有权
标题翻译：选择要连接的数据包数量的技术
公开(公告)号：US07170893B2
公开(公告)日：2007-01-30
申请号：US09882119
申请日：2001-06-15
申请人： Govinda Nallappa Rajan , Kotikalapudi Sriram
发明人： Govinda Nallappa Rajan , Kotikalapudi Sriram
IPC分类号： H04L12/56 , H04J3/24
CPC分类号： H04L49/3009 , H04L69/22 , H04L2012/5662
摘要： A communication node comprises a receiver for receiving packets and a routing device for routing the received packets to one of two output ports. For each output port, the communication node further comprises a classifier for classifying a received packet based on its traffic characteristic and storing that packet in a corresponding queue for that traffic characteristic, and a concatenated packets preparer for concatenating n received packets from each queue to form a concatenated packet to be transmitted by the associated output port, where the maximum of n is determined based on the traffic characteristic of the associated queue.
摘要翻译：通信节点包括用于接收分组的接收机和用于将接收到的分组路由到两个输出端口之一的路由设备。对于每个输出端口，通信节点还包括分类器，用于基于其业务特性对接收到的分组进行分类，并将该分组存储在用于该业务特性的相应队列中;以及级联分组准备器，用于连接来自每个队列的n个接收分组，以形成由相关联的输出端口发送的级联分组，其中基于相关联的队列的业务特性来确定最大值n。

13. 发明授权

US06674744B1 Point-to-point data transport over the internet utilizing label switching without IP headers 有权
标题翻译：通过互联网上的点对点数据传输，利用不带IP报头的标签交换
公开(公告)号：US06674744B1
公开(公告)日：2004-01-06
申请号：US09158693
申请日：1998-09-22
申请人： Bharat Tarachand Doshi , Enrique Hernandez-Valencia , Kotikalapudi Sriram , Yung-Terng Wang , On-Ching Yue
发明人： Bharat Tarachand Doshi , Enrique Hernandez-Valencia , Kotikalapudi Sriram , Yung-Terng Wang , On-Ching Yue
IPC分类号： H04L1266
CPC分类号： H04L45/302 , H04L45/00 , H04L45/50 , H04L47/10 , H04L47/16 , H04L47/193 , H04L47/2416 , H04L69/16 , H04L69/161 , H04L69/164 , H04L69/22
摘要： The specification relates to a device and method utilized for packaging voice data (and other delay critical ‘connection’ or ‘flow’ type application data) for point-to-point transport from one Packet Circuit Gateway (PCG) to a second PCG over Label Switching Routers (LSRs) within an Internet Protocol (IP) network; the beneficial aspects of the packaging format being: (i) a reduced overhead requirement when compared to conventional IP telephony due to inclusion of a switching label in lieu of an appended IP header, thereby increasing network bandwidth efficiency, and (ii) the increased transport speed associated with layer two label switching when compared to layer three forwarding.
摘要翻译：本说明书涉及一种用于将语音数据（和其他延迟关键的“连接”或“流”类型的应用数据）从一个分组电路网关（PCG）到标签上的第二个PCG的点对点传输打包的设备和方法互联网协议（IP）网络中的交换路由器（LSR）; 封装格式的有益方面是：（i）与常规IP电话相比，由于包含交换标签代替附加的IP报头，从而降低了网络带宽效率，并且（ii）增加的传输与第三层转发相比，与第二层标签交换相关联的速度。

14. 发明授权

US06529499B1 Method for providing quality of service for delay sensitive traffic over IP networks 有权
标题翻译：通过IP网络为延迟敏感业务提供服务质量的方法
公开(公告)号：US06529499B1
公开(公告)日：2003-03-04
申请号：US09158694
申请日：1998-09-22
申请人： Bharat Tarachand Doshi , Enrique Hernandez-Valencia , Kotikalapudi Sriram , Yung-Terng Wang , On-Ching Yue
发明人： Bharat Tarachand Doshi , Enrique Hernandez-Valencia , Kotikalapudi Sriram , Yung-Terng Wang , On-Ching Yue
IPC分类号： H04L1266
CPC分类号： H04L65/1043 , H04L12/4641 , H04L29/06027 , H04L45/00 , H04L45/502 , H04L47/15 , H04L47/2416 , H04L47/70 , H04L47/781 , H04L47/801 , H04L47/805 , H04L47/822 , H04L47/825 , H04L65/80 , H04M7/006 , H04Q3/0025 , H04Q3/0066 , H04Q2213/13166 , H04Q2213/13176 , H04Q2213/13196 , H04Q2213/13204 , H04Q2213/1325 , H04Q2213/13332 , H04Q2213/13337 , H04Q2213/13349 , H04Q2213/13352 , H04Q2213/13384 , H04Q2213/13389 , H04Q2213/13399
摘要： 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.
摘要翻译：通过识别用于源和目的地边缘设备之间的IP分组传输的IP网络路径，并为优先级语音流量虚拟地提供IP网络路径带宽，来提供因特网协议（IP）网络中的语音和其他延迟敏感传输的服务质量保证。基于IP网络路径上的剩余可用容量，语音分组和新语音呼叫（以及其他延迟敏感业务）的优先级保证高优先级语音（和其他延迟敏感业务）满足严格的延迟要求。虚拟配置服务器用于维护IP网络内每个路径段的带宽容量数据，并将带宽容量数据转发到信令网关。信令网关基于IP网络路径的可用带宽容量来确定是接受还是拒绝附加的延迟敏感的业务组件。然后，信令网关就发信源边缘设备向其接受或拒绝的确定信号。因此，提供了关于通过IP网络进行实时传输的可接受延迟和抖动特性的服务质量保证，而不需要直接通知建立IP网络路径的各个IP路由器。

15. 发明授权

US06349138B1 Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with descrambling 失效
标题翻译：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。

16. 发明授权

US6041051A 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
标题翻译：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
IPC分类号： H04L12/28 , H04L12/56 , H04Q11/04 , H04L12/66
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。

17. 发明授权

US5936965A Method and apparatus for transmission of asynchronous, synchronous, and variable length mode protocols multiplexed over a common bytestream 失效
标题翻译：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
申请人： Bharat Tarachand Doshi , Subrahmanyam Dravida , Kotikalapudi Sriram
发明人： Bharat Tarachand Doshi , Subrahmanyam Dravida , Kotikalapudi Sriram
IPC分类号： H04J3/16 , H04L12/56 , H04Q11/04
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。

18. 发明授权

US5463620A Bandwidth allocation, transmission scheduling, and congestion avoidance in broadband asynchronous transfer mode networks 失效
标题翻译：宽带异步传输模式网络中的带宽分配，传输调度和拥塞避免
公开(公告)号：US5463620A
公开(公告)日：1995-10-31
申请号：US200375
申请日：1994-02-22
申请人： Kotikalapudi Sriram
发明人： Kotikalapudi Sriram
IPC分类号： H04Q3/00 , H04J3/24 , H04L12/801 , H04L12/815 , H04L12/863 , H04L12/911 , H04N21/2365 , H04N21/434 , H04Q11/04 , H04J3/22
CPC分类号： H04N21/23655 , H04J3/247 , H04N21/2365 , H04N21/4347 , H04Q11/0478 , H04L2012/5616 , H04L2012/5632 , H04L2012/5638 , H04L2012/564 , H04L2012/5672 , H04L2012/5679
摘要： A wide variety of call traffic is effectively integrated in a single broadband communications network. Calls having widely differing bandwidth requirements and sensitivities to delay are handled by the network with efficient, effective, and fair bandwidth allocation and transmission scheduling. This is accomplished by classifying each call in accordance with certain signal characteristics, such as required bandwidth and sensitivity to delay. Each call class is directed to a separate queuing circuit. Some calls in certain classes, such as those associated with high-bandwidth constant bit rate services, are each directed to their own individual queuing circuits. Other calls within a class are statistically multiplexed into a single queuing circuit for that class. A multiplexing circuit operates in accordance with a dynamic time slice scheme which involves defining a service cycle time period during which the multiplexer withdraws a predetermined number of information packets from each of a plurality of queuing circuits containing information packets and places those predetermined numbers of packets onto an output link. The multiplexer breaks up the cycle time period into a plurality of time slices, each of which determines how many information packets are transmitted from each queuing circuit during the cycle time period. Efficient resource usage and congestion avoidance are further achieved by using one of a number of alternative scheduling techniques for delay insensitive traffic.
摘要翻译：各种呼叫流量有效地集成在单个宽带通信网络中。具有广泛不同的带宽要求和对延迟的敏感度的呼叫由网络处理，其具有有效，有效且公平的带宽分配和传输调度。这可以通过根据某些信号特征对每个呼叫进行分类来实现，例如所需的带宽和对延迟的灵敏度。每个呼叫类被引导到单独的排队电路。某些类别中的某些呼叫，例如与高带宽恒定比特率服务相关联的呼叫，各自被引导到它们自己的各个排队电路。一类中的其他呼叫被统计复用为该类的单个排队电路。复用电路根据动态时间片方案进行操作，其包括定义多路复用器从包含信息分组的多个排队电路中的每一个提取预定数量的信息分组的服务周期时间段，并将这些预定数量的分组放置到输出链接。多路复用器将周期时间段分解成多个时间片，每个时间片确定在周期时间段期间从每个排队电路发送多少个信息分组。通过使用用于延迟不敏感业务的多种替代调度技术之一来进一步实现有效的资源使用和拥塞避免。

19. 发明授权

US4914650A Bandwidth allocation and congestion control scheme for an integrated voice and data network 失效
标题翻译：集成语音和数据网络的带宽分配和拥塞控制方案
公开(公告)号：US4914650A
公开(公告)日：1990-04-03
申请号：US280606
申请日：1988-12-06
申请人： Kotikalapudi Sriram
发明人： Kotikalapudi Sriram
IPC分类号： H04Q11/04 , H04L12/56 , H04L12/64
CPC分类号： H04L47/10 , H04L12/64 , H04L47/23 , H04L2012/5651 , H04L2012/5671 , H04L2012/5679 , H04L2012/5681
摘要： An integrated voice and data network includes a multiplexer arranged with a voice queue for storing voice packets and a data queue for storing data packets. Voice packets are transmitted for a predetermined interval T1. Data packets are transmitted for a predetermined interval T2. The predetermined intervals T1 and T2 may be of different durations. A separate signaling queue can be provided for storing received signaling messages. If a signaling message is moved into the separate signaling queue during either interval T1 and T2, that interval is suspended and the transmission of voice or data packets is interrupted until the entire signaling message is transmitted. Then the interrupted voice or data transmission is resumed for the remainder of the suspended interval T1 or T2. As an alternative, signaling messages can be transmitted during predetermined intervals between the intervals T1 and T2. Block dropping of low order voice bits also is described for reducing congestion at the node. The multiplexer guarantees a certain minimum bandwidth for voice traffic and data traffic. Concurrently, the multiplexer allows each type of traffic to utilize any spare bandwidth momentarily available because it is not being utilized by the other type of traffic. Signaling messages are serviced with very low delay and zero packet loss.

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