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141. 发明授权

US5675576A Concestion control system and method for packet switched networks providing max-min fairness 失效
标题翻译：拥塞控制系统和分组交换网络的方法，提供最大的公平性
公开(公告)号：US5675576A
公开(公告)日：1997-10-07
申请号：US460965
申请日：1995-06-05
申请人： Lampros Kalampoukas , Anujan Varma , Kadangode K. Ramakrishnan
发明人： Lampros Kalampoukas , Anujan Varma , Kadangode K. Ramakrishnan
IPC分类号： H04Q3/00 , H04L12/56 , H04Q11/04 , H04L12/24
CPC分类号： H04L49/3081 , H04L49/503 , H04L49/506 , H04Q11/0478 , H04L2012/5619 , H04L2012/5636 , H04L49/103 , H04L49/201 , H04L49/205 , H04L49/3018 , H04L49/3027
摘要： A method is disclosed for rate allocation within the individual switches of a communications network implementing a rate-based congestion control approach for best-effort traffic. The methodology of the invention centers on a new rate allocation algorithm which performs its allocation functions independently of the number of connections sharing a network link and therefore performs an allocation in .THETA.(1) complexity. With that implementation simplicity, the algorithm is particularly advantageous for implementation in ATM switches carrying a large number of virtual channels. The algorithm operates on bandwidth information supplied from the source of a connection in special cells or packet headers, such as ATM Resource Management cells. By storing parameter values for other connections sharing a network link, the algorithm requires a constant number of simple computations for each request from a connection for a bandwidth allocation. The algorithm is asynchronous and distributed in nature and converges to the max-min fairness allocation.
摘要翻译：公开了一种用于通信网络的各个交换机内的速率分配的方法，其实现用于尽力而为业务的基于速率的拥塞控制方法。本发明的方法集中于一种新的速率分配算法，其独立于共享网络链路的连接的数量执行其分配功能，并因此执行THETA（1）复杂度的分配。利用这种实现简单性，该算法对于携带大量虚拟信道的ATM交换机中的实现特别有利。该算法对从特殊小区或分组报头（例如ATM资源管理单元）中的连接源提供的带宽信息进行操作。通过存储共享网络链路的其他连接的参数值，该算法需要针对带宽分配的连接的每个请求的恒定数量的简单计算。该算法是异步的，在本质上是分布式的，并且收敛于最大公平分配。

142. 发明授权

US5528513A Scheduling and admission control policy for a continuous media server 失效
标题翻译：连续媒体服务器的调度和准入控制策略
公开(公告)号：US5528513A
公开(公告)日：1996-06-18
申请号：US148114
申请日：1993-11-04
申请人： Lev Vaitzblit , Kadangode K. Ramakrishnan , Percy Tzelnic
发明人： Lev Vaitzblit , Kadangode K. Ramakrishnan , Percy Tzelnic
IPC分类号： H04L29/06 , H04L29/08 , H04N7/173 , G06F15/20
CPC分类号： H04L65/80 , H04L29/06027 , H04L67/322 , H04L67/325 , H04L69/329 , H04N7/17336
摘要： A scheduler with admissions control in a continuous media file server is presented. The scheduler supports multiple classes of tasks with diverse performance requirements. The scheduler is based on a combination of rate-monotonic and weighted round-robin scheduling schemes. Scheduling is accomplished in a hierarchical manner. Isochronous tasks have the highest priority and are scheduled first followed by real-time and general-purpose tasks. Isochronous tasks run periodically and are invoked by a timer interrupt set for each task. After scheduling the isochronous tasks, the scheduler alternates between the real-time tasks and the general-purpose tasks using a weighted round-robin scheme.
摘要翻译：介绍了一种在连续媒体文件服务器中具有入口控制的调度器。调度程序支持具有不同性能要求的多类任务。调度器基于速率单调和加权循环调度方案的组合。调度以分级方式完成。同步任务具有最高优先级，并且首先安排，之后是实时和通用任务。同步任务周期性运行，并由每个任务的定时器中断集调用。在调度同步任务之后，调度器使用加权循环方案在实时任务和通用任务之间交替。

143. 发明授权

US5483526A Resynchronization method and apparatus for local memory buffers management for an ATM adapter implementing credit based flow control 失效
标题翻译：用于实现基于信用的流量控制的ATM适配器的本地存储器缓冲器管理的再同步方法和装置
公开(公告)号：US5483526A
公开(公告)日：1996-01-09
申请号：US277823
申请日：1994-07-20
申请人： Michael Ben-Nun , Kadangode K. Ramakrishnan
发明人： Michael Ben-Nun , Kadangode K. Ramakrishnan
IPC分类号： H04L12/56 , H04Q11/04
CPC分类号： H04L12/5602 , H04Q11/0478 , H04L2012/5616 , H04L2012/5635 , H04L2012/5636 , H04L2012/5681
摘要： An asynchronous transfer mode (ATM) network device having a receiver portion, the receiver portion capable of receiving ATM cells on virtual circuits (VCs) from an upstream ATM switch, a local memory used to store the ATM cells, managing local memory using queues, assembling ATM cells into packets, transmitting the packets to a host memory, resynchronizing ATM credits, and a transmitter portion, the transmitter portion indicating transmitting of packets to host memory to the upstream ATM switch.
摘要翻译：具有接收机部分的异步传输模式（ATM）网络设备，能够从上游ATM交换机接收虚拟电路（VC）上的ATM信元的接收机部分，用于存储ATM信元的本地存储器，使用队列管理本地存储器，将ATM信元组合成分组，将分组发送到主机存储器，重新同步ATM信用和发送器部分，发送器部分指示向上游ATM交换机发送分组到主机存储器的分组。

144. 发明授权

US5418784A Method and apparatus for use in a network of the ethernet type, to improve fairness by controlling the interpacket gap in the event of channel capture 失效
标题翻译：在以太网类型的网络中使用的方法和装置，通过在信道捕获的情况下控制分组间隙来改善公平性
公开(公告)号：US5418784A
公开(公告)日：1995-05-23
申请号：US86443
申请日：1993-06-30
申请人： Kadangode K. Ramakrishnan , Henry S. Yang , William R. Hawe , Anthony G. Lauck
发明人： Kadangode K. Ramakrishnan , Henry S. Yang , William R. Hawe , Anthony G. Lauck
IPC分类号： H04L12/413 , H04J3/14
CPC分类号： H04L12/413
摘要： A technique for modifying the IEEE 802.3 standard for selecting transmit-to-transmit interpacket gap (IPG) intervals in a Carrier Sense Multiple Access with Collision Detection (CSMA/CD) network, in the event that a node has captured the network communication channel. If there is a small number of active nodes on the network, one node may capture the channel and the standard backoff algorithm makes it increasingly unlikely for another node to transmit. The new technique provides for less aggressive, i.e. longer, interpacket gap (IPG) intervals to be used by a node that has captured the channel, thereby increasing the likelihood that another node will gain access.
摘要翻译：在节点已经捕获了网络通信信道的情况下，修改用于在具有冲突检测（CSMA / CD）网络的载波侦听多路访问中选择发送到发送分组间隙（IPG）间隔的IEEE 802.3标准的技术。如果网络上存在少量活动节点，则一个节点可以捕获该信道，并且标准退避算法使得另一节点不太可能传输。新技术提供了较少的积极性，即较长的间隔间隔（IPG）间隔，以被捕获信道的节点使用，从而增加了另一个节点获得访问的可能性。

145. 发明授权

US5390299A System for using three different methods to report buffer memory occupancy information regarding fullness-related and/or packet discard-related information 失效
标题翻译：用于使用三种不同方法来报告关于与丰满度和/或丢弃丢弃相关的信息的缓冲存储器占用信息的系统
公开(公告)号：US5390299A
公开(公告)日：1995-02-14
申请号：US814998
申请日：1991-12-27
申请人： Satish L. Rege , Kadangode K. Ramakrishnan , David A. Gagne
发明人： Satish L. Rege , Kadangode K. Ramakrishnan , David A. Gagne
IPC分类号： G06F13/18 , G06F13/38 , G06F13/42 , G06F12/00
CPC分类号： G06F13/387 , G06F13/18
摘要： In a network adapter for a host computer, the data occupancy level of a buffer memory used to store network packets is monitored, and the occupancy level is reported to the host. The buffer memory is organized as a plurality of fixed-size pages. A memory controller uses an allocation counter to track the number of pages available to store incoming data packets, and the value of the allocation counter is compared with a programmable threshold. A data word accompanies each packet delivered to the host to indicate whether the allocation count exceeds the threshold. When the buffer memory has insufficient free space to store an incoming packet, the packet is discarded. The network adapter keeps a count of the number of discarded packets. An adapter manager microprocessor, which is part of the network adapter, reports the count to the host computer on request. The adapter manager also reports the value of the allocation count and other important network adapter variables to the host computer.
摘要翻译：在用于主计算机的网络适配器中，监视用于存储网络分组的缓冲存储器的数据占用级别，并将占用级别报告给主机。缓冲存储器被组织为多个固定大小的页面。存储器控制器使用分配计数器来跟踪可用于存储输入数据分组的页面数量，并将分配计数器的值与可编程阈值进行比较。数据字伴随传送到主机的每个分组，以指示分配计数是否超过阈值。当缓冲存储器没有足够的可用空间来存储传入的数据包时，丢弃数据包。网络适配器保留丢弃数据包的数量。适配器管理器微处理器是网络适配器的一部分，可根据要求向计算机报告计数。适配器管理器还将分配计数和其他重要网络适配器变量的值报告给主机。

146. 发明授权

US5280478A No-owner frame and multiple token removal mechanism for token ring networks 失效
标题翻译：令牌环网络的无所有者帧和多个令牌删除机制
公开(公告)号：US5280478A
公开(公告)日：1994-01-18
申请号：US558961
申请日：1990-07-27
申请人： Henry Yang , Kadangode K. Ramakrishnan , Paul W. Ciarfella
发明人： Henry Yang , Kadangode K. Ramakrishnan , Paul W. Ciarfella
IPC分类号： H04L12/42 , H04L12/433
CPC分类号： H04L12/42 , H04L12/433
摘要： A ring purging station for a token-ring network is disclosed. The station performs purging operations to remove no-owner frames and frame remnants from the network. The station begins a purging operation by detecting the token on the network and removing it. The station then begins stripping all frame and remnants of frames that it receives from the network, transmits one or more purge marker frames, and sets a purge operation timer to expire after a predetermined period of time. The predetermined period of time is greater than the maximum time required for a frame to propagate around the token ring network when the ring is not malfunctioning. The predetermined period of time may also be less than a valid transmission time period. When the station either detects one of the one or more purge marker frames it transmitted, or when the purge operation timer expires, the station ends the purging operation, and releases the token back onto the ring. The station is also capable of selecting, in cooperation with the other stations, which station is to operate as purging station. The station is further capable of performing duplicate address tests, and will terminate any purging operation upon detection of a duplicate address. In this way no-owner frames and frame fragments are removed from the network, while the ring is otherwise normally operating.
摘要翻译：在包括多个站的令牌环网络中，当从所述令牌环网络清除不拥有所有者帧时，通常启动清除操作，然后进行重新初始化。在某些情况下，振铃初始化可能会无限期地重复，扰乱协议和环操作。本发明提供一种方法和机构，由此从环中清除多个令牌和无所有者的框架。该机构还选择环中的站作为环形清除器操作。

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