公开(公告)号：US06813277B2

公开(公告)日：2004-11-02

申请号：US10036272

申请日：2001-12-26

申请人： Eugene L. Edmon ,  Chia-Chang Li ,  Kotikalapudi Sriram

发明人： Eugene L. Edmon ,  Chia-Chang Li ,  Kotikalapudi Sriram

IPC分类号： H04J300

CPC分类号： H04L65/80 ,  H04J3/1694 ,  H04L12/2801 ,  H04L29/06 ,  H04L29/06027 ,  H04L2012/561 ,  H04L2012/5671 ,  H04L2012/5675 ,  H04N7/17318 ,  H04Q11/0478

摘要： A protocol for handling multiple access on broadband communication networks, e.g., fiber/coax networks and wireless networks, supports both continuous bit rate (CBR) and variable bit rate (VBR) traffic representing voice, video telephony, interactive television, and data. The invention is carried out both in customer premise equipment (CPE) at stations, and in a common controller with which all stations communicate. A medium access control (MAC) processor provided in each of the stations and in the common controller divides the time domain for a given RF channel into a series of successive frames, each having a plurality of time slots. Because of the architecture of the communication network, individual stations do not communicate directly with each other, but can receive broadcast messages indicating the status of each time slot, which messages are generated in the common controller and transmitted in a downstream channel. When a station desires to transmit information in the upstream direction, it inserts the information into an available time slot, with availability being determined in accordance with time slot status. Depending upon the type of traffic being originated, a station can indicate to the common controller a need for continued use of the “same” time slot in successive frames. This permits a station, such as a station requiring a CBR connection, to avoid having to contend repeatedly for continued access to the transmission network. In the case of a wireless communication network, the invention is carried out both in mobile stations, and in a base station which acts as a common controller and with which all mobile stations communicate.

摘要翻译： 用于处理宽带通信网络（例如，光纤/同轴电缆网络和无线网络）上的多路访问的协议支持代表语音，视频电话，交互式电视和数据的连续比特率（CBR）和可变比特率（VBR）业务。 本发明在站点的客户驻地设备（CPE）以及所有站点通信的公共控制器中进行。 提供在每个站和公共控制器中的介质访问控制（MAC）处理器将给定RF信道的时域划分为一系列连续的帧，每个帧具有多个时隙。 由于通信网络的架构，各个站不直接相互通信，而是可以接收指示每个时隙的状态的广播消息，哪些消息在公共控制器中生成并在下行信道中发送。 当站希望在上行方向传输信息时，它将信息插入到可用时隙中，其可用性根据时隙状态确定。 根据发起的业务类型，站可以向公共控制器指示在连续帧中继续使用“相同”时隙的需要。 这允许诸如要求CBR连接的站之类的站点避免不得不反复争取持续访问传输网络。 在无线通信网络的情况下，本发明在移动台以及作为公共控制器的基站中进行，并且所有移动台都与其通信。

公开(公告)号：US5953344A

公开(公告)日：1999-09-14

申请号：US762789

申请日：1996-12-10

申请人： James E. Dail ,  Chia-Chang Li ,  Peter D. Magill ,  Kotikalapudi Sriram

发明人： James E. Dail ,  Chia-Chang Li ,  Peter D. Magill ,  Kotikalapudi Sriram

IPC分类号： H04J3/16 ,  H04L12/56 ,  H04L12/64 ,  H04N21/222 ,  H04N21/2381 ,  H04N21/2385 ,  H04N21/239 ,  H04N21/61 ,  H04N21/643 ,  H04Q11/04 ,  H04L5/22

CPC分类号： H04N21/2381 ,  H04J3/1694 ,  H04L12/6418 ,  H04N21/2221 ,  H04N21/2385 ,  H04N21/239 ,  H04N21/6118 ,  H04N21/64307 ,  H04Q11/0478 ,  H04J2203/0069 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/561 ,  H04L2012/5632 ,  H04L2012/6427 ,  H04L2012/6456

摘要： A head-end dynamically allocates bandwidth of a communications channel as a function of the type of communications traffic. In particular, the head-end communicates to subscriber stations via a broadband cable network using an access protocol, which is modified to provide a variable number of mini-slots and a variable number of data slots in each frame. Each mini-slot is used to request assignment of a data slot(s) to subscriber stations for the communication of information and, also, as a vehicle to resolve contention between subscriber stations. The head-end dynamically adjusts the number of mini-slots over a period time as a function of the type of communications traffic, e.g., bursty and isochronous traffic sources. Any variation in the number of mini-slots concomitantly effects the number of data slots available to communicate information. For example, less mini-slots provides more data slots. As a result, the dynamic adjustment of the number of mini-slots allows the head-end to more efficiently allocate bandwidth on the communications channel.

摘要翻译： 根据通信流量的类型，头端动态地分配通信信道的带宽。 特别地，头端通过使用接入协议的宽带有线网络与用户站通信，接入协议被修改为在每帧中提供可变数目的小时隙和可变数量的数据时隙。 每个小时隙用于请求分配给订户站的数据时隙用于信息的通信，并且还用作解决用户站之间争用的工具。 前端根据通信业务的类型（例如突发和等时业务源）动态地调整一段时间内的小时隙数量。 迷你时隙数量的任何变化同时影响可用于传达信息的数据时隙数量。 例如，较少的迷你插槽提供更多的数据插槽。 结果，微时隙的数量的动态调整允许前端在通信信道上更有效地分配带宽。

公开(公告)号：US08521022B1

公开(公告)日：2013-08-27

申请号：US10128092

申请日：2002-04-23

申请人： Kotikalapudi Sriram ,  Mukul Katiyar ,  Jonathan Titchener ,  Rajender Rao Nednur ,  Anthony Vernon Walker Smith

发明人： Kotikalapudi Sriram ,  Mukul Katiyar ,  Jonathan Titchener ,  Rajender Rao Nednur ,  Anthony Vernon Walker Smith

IPC分类号： H04J14/00

CPC分类号： H04Q11/0005 ,  H04J14/0221 ,  H04J14/0246 ,  H04J14/0257 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0283 ,  H04J14/0284

摘要： In an automatically switched optical network, the wavelengths are assigned to optical path based on their intrinsic physical performance and on the current network operating parameters. The wavelength performance information is organized in binning tables, based primarily on the wavelength reach capabilities. A network topology database provides the distance between the nodes of the network, which is used to determine the length of the optical path. Other network operating parameters needed for wavelength selection are also available in this database. Once a bin corresponding to the path length is identified in the binning table, the wavelength for that path is selected based on length only, or based on the length and one or more additional parameters. The optical path performance is estimated for the selected wavelength, and the search continues if the estimated path performance is not satisfactory. Several available wavelengths are searched and of those, the wavelength that is most used along the optical path in consideration or alternatively network-wide is selected and assigned. This method helps minimize wavelength fragmentation. The binning tables may have various granularities, and may be organized by reach, or by reach, wavelength spacing, the load on the respective optical path, the fiber type, etc.

摘要翻译： 在自动切换光网络中，根据其固有物理性能和当前网络运行参数将波长分配给光路。 波长性能信息主要基于波长到达能力组织在合并表中。 网络拓扑数据库提供网络节点之间的距离，用于确定光路长度。 波长选择所需的其他网络运行参数也可在此数据库中使用。 一旦在分箱表中识别出对应于路径长度的仓，则该路径的波长仅基于长度，或者基于长度和一个或多个附加参数来选择。 对于所选择的波长估计光路性能，如果估计的路径性能不令人满意，则搜索继续。 搜索几种可用的波长，并且选择和分配在考虑中或最广泛的光路中最常使用的波长。 该方法有助于最小化波长碎片。 分箱表可以具有各种粒度，并且可以通过到达或到达波长间隔，各个光路上的负载，光纤类型等来组织。

公开(公告)号：US07414968B1

公开(公告)日：2008-08-19

申请号：US09521730

申请日：2000-03-09

申请人： Kotikalapudi Sriram ,  Yung-Terng Wang

发明人： Kotikalapudi Sriram ,  Yung-Terng Wang

IPC分类号： H04L12/26

CPC分类号： H04Q11/0478 ,  H04L2012/5638 ,  H04L2012/5656 ,  H04L2012/6481

摘要： An AAL2/SSCS packet voice system multiplexes various forms of voice-band traffic including voice packets, fax packets, and data packets into a virtual circuit (VC). This AAL2/SSCS packet voice system executes a dynamic call admission algorithm that takes into account call type in deciding whether to admit a new call to the VC. In particular, this approach takes into account different bandwidth needs for different call types. The AAL2/SSCS packet voice system also performs bit or block dropping on voice packets to mitigate the effects of traffic congestion. The bit or block dropping is done based on the packet queue fill value exceeding at least one queue threshold. Further, the AAL2/SSCS packet voice system also dynamically varies a queue threshold as a function of capacity.

摘要翻译： AAL2 / SSCS分组语音系统将包括语音分组，传真分组和数据分组在内的各种语音频带业务复用到虚拟电路（VC）中。 该AAL2 / SSCS分组语音系统执行动态呼叫准入算法，该算法在决定是否允许对VC的新呼叫时考虑呼叫类型。 特别地，这种方法考虑到不同呼叫类型的不同带宽需求。 AAL2 / SSCS分组语音系统还对语音分组进行比特或阻塞，以减轻交通拥堵的影响。 基于分组队列填充值超过至少一个队列阈值来完成比特或块丢弃。 此外，AAL2 / SSCS分组语音系统还动态地改变作为容量的函数的队列阈值。

公开(公告)号：US06169738A

公开(公告)日：2001-01-02

申请号：US08965515

申请日：1997-11-06

申请人： Kotikalapudi Sriram ,  Yung-Terng Wang

发明人： Kotikalapudi Sriram ,  Yung-Terng Wang

IPC分类号： H04L1228

CPC分类号： H04Q11/0478 ,  H04L2012/5638 ,  H04L2012/5656 ,  H04L2012/6481

摘要： An AAL2/SSCS packet voice system multiplexes various forms of voice-band traffic including voice packets, fax packets, and data packets into a virtual circuit (VC). This AAL2/SSCS packet voice system executes a dynamic call admission algorithm that takes into account call type in deciding whether to admit a new call to the VC. In particular, this approach takes into account different bandwidth needs for different call types. The AAL2/SSCS packet voice system also performs bit or block dropping on voice packets to mitigate the effects of traffic congestion. The bit or block dropping is done based on the packet queue fill value exceeding at least one queue threshold. Further, the AAL2/SSCS packet voice system also dynamically varies a queue threshold as a function of capacity.

摘要翻译： AAL2 / SSCS分组语音系统将包括语音分组，传真分组和数据分组在内的各种语音频带业务复用到虚拟电路（VC）中。 该AAL2 / SSCS分组语音系统执行动态呼叫准入算法，该算法在决定是否允许对VC的新呼叫时考虑呼叫类型。 特别地，这种方法考虑到不同呼叫类型的不同带宽需求。 AAL2 / SSCS分组语音系统还对语音分组进行比特或阻塞，以减轻交通拥堵的影响。 基于分组队列填充值超过至少一个队列阈值来完成比特或块丢弃。 此外，AAL2 / SSCS分组语音系统还动态地改变作为容量的函数的队列阈值。

公开(公告)号：US6075798A

公开(公告)日：2000-06-13

申请号：US880181

申请日：1997-06-20

申请人： Terry Gregory Lyons ,  Kotikalapudi Sriram

发明人： Terry Gregory Lyons ,  Kotikalapudi Sriram

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04J3/24

CPC分类号： H04Q11/0478 ,  H04L2012/5616 ,  H04L2012/5656 ,  H04L2012/5671

摘要： A packet voice system includes an ATM Adaptation Layer Type 2 (AAL-2) and Service Specific Convergence Sublayer (SSCS) System comprising a transmitter and a receiver. A portion of the 32 codepoints of the five bit RES (or UUI) field of the AAL-2 header are predefined to indicate an extended header. This a prior definition is stored in tables in both the transmitter and the receiver. The extended header itself comprises an additional octet appended to the AAL-2 header. A sequence number is normally carried in the RES field for the packet stream of voice calls that require sequence numbers. When the extended header is used, the sequence number is part of the extended header and thus messages are conveyed from the transmitter to the receiver without causing an interruption to sequence number assignment messages The transmitter dynamically uses the extended header and discontinues use of the extended header after a predefined duration of time or upon receiving an acknowledgment from the receiver.

摘要翻译： 分组语音系统包括包括发射机和接收机的ATM适配层类型2（AAL-2）和业务特定会聚子层（SSCS）系统。 AAL-2头部的5位RES（或UUI）字段的32个代码点中的一部分被预先定义以指示扩展头。 这个先前的定义存储在发射机和接收机中的表中。 扩展报头本身包括附加到AAL-2报头的附加八位字节。 序列号通常在需要序列号的语音呼叫的分组流的RES字段中携带。 当使用扩展报头时，序列号是扩展报头的一部分，因此消息从发送器传送到接收器，而不会导致序列号分配消息的中断。发送器动态地使用扩展报头并停止使用扩展报头 在预定义的持续时间之后或在从接收机接收到确认之后。

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。

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。

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.