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    • 4. 发明授权
    • Method and apparatus for routing ATM cells in an AD-ATM LAN
    • 用于在AD-ATM LAN中路由ATM信元的方法和装置
    • US5757783A
    • 1998-05-26
    • US490981
    • 1995-06-15
    • Kai Yin EngMark John KarolMalathi Veeraraghavan
    • Kai Yin EngMark John KarolMalathi Veeraraghavan
    • H04Q3/00H04B7/26H04L12/56H04Q7/22H04Q7/24H04Q7/26H04Q7/30H04Q11/04
    • H04L45/10H04Q11/0478H04L2012/5605H04L2012/5607H04L2012/5615H04L2012/5619
    • A system and method for routing ATM cells in a wireless ATM local area network (LAN) that use portable base station (PBS) switching nodes. Routing of cells to and from mobile users within the network is accomplished utilizing a novel routing scheme which preserves cell sequence. Each user transmitting data to another user is associated with a Source Home Station or node and each user receiving data is associated with a Destination Home Station or node. When a connection is established in the network between a first mobile user and a second mobile user, the ATM cells are routed along a fixed path from the first mobile user to the associated Source Home Station and along a fixed path between the Source Home Station to the Destination Home Station and then along a fixed path from the Destination Home Station to the second destination user. In this way cell sequence is maintain by utilizing the Source Home to Destination Home path. Mobile users within the network are also associated with a Local PBS which can be different from the Home Stations as the mobile moves around the network. The Local PBSs associated with the mobile user are slowly updated to be the Home Stations to cure inefficient routing.
    • 一种用于在使用便携式基站(PBS)交换节点的无线ATM局域网(LAN)中路由ATM信元的系统和方法。 利用保留小区序列的新颖的路由方案来实现到网络内移动用户的移动用户的路由。 向另一用户发送数据的每个用户与源家庭站或节点相关联,并且每个接收数据的用户与目的地家庭站或节点相关联。 当在第一移动用户和第二移动用户之间的网络中建立连接时,ATM信元沿着固定路径从第一移动用户路由到相关联的源家庭站,并沿着源家庭站之间的固定路径路由到 目的地家庭站,然后沿着从目的地家庭站到第二目的地用户的固定路径。 以这种方式,通过利用源归属到目的地归属路径来维护信元序列。 网络中的移动用户也与本地PBS相关联,本地PBS可以随着移动网络周围移动而与家庭站不同。 与移动用户相关联的本地PBS被缓慢更新为家庭站,以治愈低效路由。
    • 5. 发明授权
    • Technique for internetworking traffic on connectionless and connection-oriented networks
    • 在无连接和面向连接的网络上网络通信的技术
    • US06628617B1
    • 2003-09-30
    • US09261807
    • 1999-03-03
    • Mark John KarolMalathi Veeraraghavan
    • Mark John KarolMalathi Veeraraghavan
    • H04L1256
    • H04L12/66
    • Traffic on a connectionless (CL) network, such as IP packets, can be routed onto a connection a connection oriented (CO) network, such as an ATM telephony network, when it is advantageous to do so from a user or service provider viewpoint, without affecting the ability of users to continue to use existing applications. Routing is controlled by nodes called CL-CO gateways, with connectivity to both the CL network and the Co network. When CL traffic originating at a source reached these gateway nodes, a decision is made whether to continue carrying the information in the CL mode, or to redirect the traffic to a CO network. In accordance with one embodiment of the present invention, each CL-Co gateway includes hardware and software modules that typically comprise (a) interfaces to the Co network, (b) interfaces to the CL network (c) a moderately sized packet buffer for temporarily storing packets waiting for CO network setup or turnaround; (d) a database for storing forwarding, flow control header translation and other information, and (e) a processor containing logic for controlling the gateway packet handling operations.
    • 如果从用户或服务提供商的观点来看有利的话,诸如IP分组的无连接(CL)网络上的业务可被路由到面向连接(CO)网络的连接,例如ATM电话网络, 而不影响用户继续使用现有应用程序的能力。 路由由称为CL-CO网关的节点控制,具有与CL网络和Co网络的连接。 当来自源的CL流量到达这些网关节点时,确定是否继续携带CL模式中的信息,或将流量重定向到CO网络。 根据本发明的一个实施例,每个CL-Co网关包括硬件和软件模块,其通常包括(a)到Co网络的接口,(b)到CL网络的接口(c)用于临时的中等大小的分组缓冲器 存储等待CO网络建立或周转的数据包; (d)用于存储转发,流量控制报头转换和其他信息的数据库,以及(e)包含用于控制网关包处理操作的逻辑的处理器。
    • 9. 发明授权
    • Rapid fault detection and recovery for internet protocol telephony
    • 互联网协议电话快速故障检测和恢复
    • US07782787B2
    • 2010-08-24
    • US10953024
    • 2004-09-29
    • Mark John KarolParameshwaran KrishnanJuan Jenny Li
    • Mark John KarolParameshwaran KrishnanJuan Jenny Li
    • G01R31/08
    • H04L43/50H04L43/10H04L65/80H04L69/40
    • Techniques for performing rapid fault detection and recovery in communication networks are disclosed. For example, in one aspect of the invention, a technique for detecting one or more conditions in a communication network comprises the following steps/operations. One or more keep-alive packets are transmitted from a source node in the communication network to a destination node in the communication network over two or more paths between the source node and the destination node, wherein the two or more paths are at least partially disjoint. Upon receipt of the one or more keep-alive packets at the destination node via the two or more paths, at least one quality measure is computed at the destination node for each of the two or more paths, the at least one quality measure being indicative of one or more conditions in the communication network. While not limited thereto, the invention is particularly well-suited to Internet Protocol (IP) telephony networks, particularly those that provide Voice over IP (VoIP) applications.
    • 公开了在通信网络中执行快速故障检测和恢复的技术。 例如,在本发明的一个方面,用于检测通信网络中的一个或多个条件的技术包括以下步骤/操作。 一个或多个保持活动分组从通信网络中的源节点通过源节点和目的地节点之间的两个或多个路径发送到通信网络中的目的地节点,其中两个或更多个路径至少部分地不相交 。 经由两个或多个路径在目的地节点处接收到一个或多个保持活动分组时,在目的地节点处针对两个或更多个路径中的每一个计算至少一个质量度量,所述至少一个质量度量指示 通信网络中的一个或多个条件。 虽然不限于此,本发明特别适用于因特网协议(IP)电话网络,特别是那些提供IP语音(VoIP)应用的电话网络。
    • 10. 发明申请
    • Creating a Telecommunications Channel from Multiple Channels that Have Differing Signal-Quality Guarantees
    • 从具有不同信号质量保证的多个频道创建电信频道
    • US20090016370A1
    • 2009-01-15
    • US11775549
    • 2007-07-10
    • Mark John Karol
    • Mark John Karol
    • H04L12/56
    • H04L45/22H04L5/0037H04L5/006H04L45/00H04L45/02H04L45/24H04L45/302H04L45/306H04L47/12H04L47/14
    • A technique is disclosed that enables the adaptive pooling of M transmission paths that offer a first signal-quality guarantee, or no guarantee at all, with N transmission paths that offer a second signal-quality guarantee. Through this adaptive pooling, a telecommunications channel is created that meets the quality of service or waveform quality required for a packet stream being transmitted, while not excessively exceeding the required quality. The technique adaptively recaptures any excess signal quality from one path and uses it to boost the quality of an inferior path. A node of the illustrative embodiment selects the paths to handle a current segment of source packets, based on one or more parameters that are disclosed herein. The node adapts to changing conditions by adjusting the transmission characteristics for each successive segment of packets from the source packet stream.
    • 公开了一种技术,其能够提供提供第一信号质量保证或完全不保证的提供第二信号质量保证的N个传输路径的M个传输路径的自适应池。 通过这种自适应池,创建一个电信信道,以满足正在发送的分组流所需的服务质量或波形质量,而不会超过所需的质量。 该技术从一条路径自适应地重新捕获任何过剩的信号质量,并用它来提高劣质路径的质量。 说明性实施例的节点基于本文公开的一个或多个参数来选择处理源分组的当前分段的路径。 节点通过调整来自源分组流的每个连续的分组段的传输特性来适应变化的条件。