公开(公告)号：US06072790A

公开(公告)日：2000-06-06

申请号：US311450

申请日：1999-05-13

申请人： Phillip D. Neumiller ,  Peter Lei ,  Randall R. Stewart

发明人： Phillip D. Neumiller ,  Peter Lei ,  Randall R. Stewart

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04W8/00 ,  H04W8/26 ,  H04W28/14 ,  H04W88/08 ,  H04Q7/24

CPC分类号： H04W8/005 ,  H04W28/14 ,  H04W8/26 ,  H04W88/08

摘要： A switch (101) performs distribution functions by distributing packets to base stations that were most recently heard from. More particularly, as a gateway (115) provides frames to the switch (101), the switch (101) distributes the frames to all base stations in communication with a remote unit (113). In order to determine the plurality of base stations requiring the frames, an identification of base stations (on a per-call basis) currently backhauling data to the switch (101) for the call is maintained. The switch (101) then distributes frames received from the gateway (115) to those base stations currently providing uplink frames to the switch (101) for the particular call.

摘要翻译： 交换机（101）通过向最近听到的基站分发分组来执行分发功能。 更具体地，当网关（115）向交换机（101）提供帧时，交换机（101）将帧分配给与远程单元（113）通信的所有基站。 为了确定需要这些帧的多个基站，维护当前用于呼叫的交换机（101）回程数据的基站（基于每个呼叫）的标识。 然后，交换机（101）将从网关（115）接收的帧分配给当前提供上行链路帧的基站，用于特定呼叫的交换机（101）。

公开(公告)号：US06226283B1

公开(公告)日：2001-05-01

申请号：US09311794

申请日：1999-05-13

申请人： Phillip D. Neumiller ,  Peter Lei ,  Randall R. Stewart

发明人： Phillip D. Neumiller ,  Peter Lei ,  Randall R. Stewart

IPC分类号： H04Q728

CPC分类号： H04W48/16 ,  H04W36/18

摘要： Frames received by base stations (base stations) (103-107) are assigned a frame-quality indicator (FQI) by the base station. FQI information for all frames received is continuously backhauled to a switch (101). The switch (101) sidehauls the FQI information to a call anchoring base station, where a determination of a base station with the best FQI for each frame takes place. Once the anchoring base station determines a base station with the best FQI for a particular frame, the anchoring base station sends a FORWARD_FRAME message to the base station with the best FQI, or, if the anchoring base station is the base station with the best FQI, nothing is sent to the other base stations. Once the FORWARD_FRAME message is received by a base station, the base station immediately forwards the frame (identified by the frame number) to the switch (101). The switch (101) then routes the selected frame accordingly.

摘要翻译： 由基站（基站）（103-107）接收的帧由基站分配帧质量指示符（FQI）。 所接收的所有帧的FQI信息被连续回程到交换机（101）。 交换机（101）将FQI信息侧转到呼叫锚定基站，其中发生对于每个帧具有最佳FQI的基站的确定。 一旦锚定基站确定具有特定帧的最佳FQI的基站，则锚定基站向具有最佳FQI的基站发送FORWARD_FRAME消息，或者如果锚定基站是具有最佳FQI的基站 没有发送到其他基站。 一旦基站接收到FORWARD_FRAME消息，基站立即将帧（由帧号识别）转发到交换机（101）。 交换机（101）然后相应地路由所选择的帧。

公开(公告)号：US6134221A

公开(公告)日：2000-10-17

申请号：US292733

申请日：1999-04-15

申请人： Randall R. Stewart ,  Qiaobing Xie ,  Phillip D. Neumiller

发明人： Randall R. Stewart ,  Qiaobing Xie ,  Phillip D. Neumiller

IPC分类号： H04L1/20 ,  H04W24/00 ,  H04J3/14

CPC分类号： H04W24/00 ,  H04L1/20

摘要： The present invention provides a method for evaluating a communication link between a first communication site and a second communication site. The first and second communication sites increment a sent counter and reset a received counter upon sending a message to the other communication site. Each communication site also increments a received counter and reset a sent counter upon receiving a message from the other communication site. When the sent counter exceeds a sent threshold, the communication system site sends an alert that the communication link is down. When the received counter exceeds a predetermined percentage of the other communication site's sent counter, the site sends a message to the other communication site to let the other communication system site know that it is still receiving messages.

摘要翻译： 本发明提供了一种用于评估第一通信站点和第二通信站点之间的通信链路的方法。 第一和第二通信站点在发送消息到其他通信站点时增加发送的计数器并重置接收到的计数器。 每个通信站点也会增加收到的计数器，并在从其他通信站点接收到消息时重置发送的计数器。 当发送的计数器超过发送的阈值时，通信系统站点发送通知链路关闭的警报。 当所接收的计数器超过其他通信站点的发送计数器的预定百分比时，站点向另一个通信站点发送消息，让另一个通信系统站点知道它仍在接收消息。

公开(公告)号：US07630364B2

公开(公告)日：2009-12-08

申请号：US11257820

申请日：2005-10-24

申请人： Randall R. Stewart ,  Peter Lei

发明人： Randall R. Stewart ,  Peter Lei

IPC分类号： H04L12/28 ,  H04L12/56 ,  G06F9/00 ,  G06F15/16

CPC分类号： H04L29/12462 ,  H04L61/255 ,  H04L63/0263 ,  H04L67/02

摘要： Rules in NAT and firewall devices are updated only when a packet flow is verified as genuine through transport-layer message acknowledgment sequences. When a device receives a packet indicating initiation of a new association, the device stores an internal source tag, an internal destination tag, an external source tag, and an external destination tag. Only after receiving a completion acknowledgment message from the destination node, the device sets the internal source tag equal to the external source tag, and sets the internal destination tag equal to the external destination tag. The rules are then updated based on the internal tags. As a result, the approach thwarts denial of service (DOS) attacks that seek to modify rules of NAT and firewall devices to permit harmful traffic.

摘要翻译： NAT和防火墙设备中的规则仅在通过传输层消息确认序列将数据包流验证为真时才更新。 当设备接收到指示新关联的启动的分组时，设备存储内部源标签，内部目的地标签，外部源标签和外部目的地标签。 只有从目的地节点收到完成确认消息后，设备将内部源标签设置为等于外部源标签，并将内部目的地标签设置为等于外部目的地标签。 然后根据内部标签更新规则。 因此，这种方法阻碍了拒绝服务（DOS）攻击，这些攻击旨在修改NAT和防火墙设备的规则，以允许有害的流量。

公开(公告)号：US07388836B2

公开(公告)日：2008-06-17

申请号：US10383859

申请日：2003-03-07

申请人： Randall R. Stewart ,  Peter Lei ,  Patrick Mahan

发明人： Randall R. Stewart ,  Peter Lei ,  Patrick Mahan

IPC分类号： H04L1/00

CPC分类号： H04L47/27 ,  H04L47/10 ,  H04L47/193 ,  H04L47/283 ,  H04L47/323

摘要： A method for communicating data in a network environment is provided that includes receiving one or more packets for establishing a communication session in a network and determining which of the packets should be delayed. A selected one or more of the packets are delayed for a designated time interval in order to extend a roundtrip time (RTT) parameter associated with the selected packets. The selected packets are communicated after the time interval has expired.

摘要翻译： 提供一种用于在网络环境中传送数据的方法，包括：接收一个或多个分组，用于在网络中建立通信会话，并确定哪个分组应该被延迟。 所选择的一个或多个分组被延迟指定的时间间隔，以便扩展与所选分组相关联的往返时间（RTT）参数。 所选择的数据包在时间间隔到期后通信。

公开(公告)号：US07027389B2

公开(公告)日：2006-04-11

申请号：US09734783

申请日：2000-12-11

申请人： Randall R. Stewart

发明人： Randall R. Stewart

IPC分类号： H04L12/16

CPC分类号： H04L12/66 ,  H04L43/0811 ,  H04L43/0864 ,  H04L43/16

摘要： The present invention provides a method and apparatus to determine the state of a communications link between two nodes in a network. Typically, each node will have an RTT-based value to use, a packets sent counter, and a threshold number to use against the packet sent counter to determine if there is a problem with their communications link. Using the RTT value makes the failure detection sensitive to the actual state of the communications link at any particular time; it also allows the failure detection algorithm to take into account the bursty nature of nodes in a packetized network connection. For each packet received from a non-local node, the local node sets the counter to 0 and starts a new RTT-based time interval. The local node then increments the counter only once, regardless of how many packets it sends to the non-local node, during the RTT-based time interval. Once the time interval is up, the counter is incremented for each packet sent. The counter is compared to the fixed threshold value to determine if it is likely a communications link failure has occurred.

公开(公告)号：US08149842B2

公开(公告)日：2012-04-03

申请号：US12198067

申请日：2008-08-25

申请人： Mohamed Khalid ,  Kenneth Durazzo ,  Randall R. Stewart ,  Vivek Datar ,  Ramakrishnan Rajamoni

发明人： Mohamed Khalid ,  Kenneth Durazzo ,  Randall R. Stewart ,  Vivek Datar ,  Ramakrishnan Rajamoni

IPC分类号： H04L12/28

CPC分类号： H04L67/141 ,  H04L67/14 ,  H04L69/14 ,  H04L69/16 ,  H04L69/163

摘要： Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with automated discovery of network devices supporting particular transport layer protocols, such as, but not limited to Stream Control Transmission Protocol (SCTP). Packet switching devices automatically discover peer packet switching devices supporting a particular transport layer protocol, and then establish a session using the particular transport layer protocol between them for subsequent use in transporting packets.

摘要翻译： 公开了尤其涉及支持特定传输层协议（例如但不限于流控制传输协议（SCTP））的网络设备的自动发现的方法，装置，计算机存储介质，机制和装置。 分组交换设备自动发现支持特定传输层协议的对等分组交换设备，然后使用它们之间的特定传输层协议来建立会话，以便随后用于传输分组。

公开(公告)号：US07706281B2

公开(公告)日：2010-04-27

申请号：US11326841

申请日：2006-01-06

申请人： Mitesh Dalal ,  Randall R. Stewart

发明人： Mitesh Dalal ,  Randall R. Stewart

IPC分类号： H04J1/16

CPC分类号： H04L45/22 ,  H04L45/02 ,  H04L47/10 ,  H04L47/11 ,  H04L47/122 ,  H04L47/26

摘要： A multi-homed network node comprises an interface that is addressable using a primary network address and a secondary network address. Network packets identifying the primary network address traverse a first network path and packets identifying the second network address traverse a second network path that is routed physically separately from the first network path. A transport layer network protocol association is established in the network between a first node and the multi-homed node. One or more data messages are sent to the second node and identify the primary network address. Network feedback information indicates one or more performance characteristics of the first network path. In response, the data messages are automatically modified to identify the secondary network address.

摘要翻译： 多宿主网络节点包括使用主网络地址和辅助网络地址可寻址的接口。 标识主网络地址的网络分组穿过第一网络路径，标识第二网络地址的分组穿过与第一网络路径物理分开路由的第二网络路径。 在第一节点和多归位节点之间的网络中建立传输层网络协议关联。 将一个或多个数据消息发送到第二个节点并识别主要网络地址。 网络反馈信息指示第一网络路径的一个或多个性能特征。 作为响应，数据消息被自动修改以识别辅助网络地址。

公开(公告)号：US07051109B1

公开(公告)日：2006-05-23

申请号：US10008091

申请日：2001-11-09

申请人： Randall R. Stewart ,  Peter P. Lei

发明人： Randall R. Stewart ,  Peter P. Lei

IPC分类号： G06F15/16 ,  G06F15/177 ,  H04J3/16

CPC分类号： H04L12/2854

摘要： Methods and apparatus for supporting mobility using SCTP are disclosed. In accordance with one aspect of the invention, an SCTP association between a first network device and a second network device may be modified. The SCTP association includes a first set of IP addresses associated with the first network device and a second set of IP addresses associated with the second network device. The first network device establishes the SCTP association between the first network device and the second network device. An SCTP configuration message is then sent from the first network device to the second network device, the configuration message indicating a modification to be made to the SCTP association, thereby enabling the SCTP association to be modified without disconnecting an existing session.

公开(公告)号：US06373828B1

公开(公告)日：2002-04-16

申请号：US09105340

申请日：1998-06-26

申请人： Randall R. Stewart ,  Edgar Martinez ,  Tom Joyner ,  Rich Noradt

发明人： Randall R. Stewart ,  Edgar Martinez ,  Tom Joyner ,  Rich Noradt

IPC分类号： H04Q700

CPC分类号： H04W36/14

摘要： A method and apparatus for a handover of a communication signal (370) associated with a mobile communication unit (116) between a Generic C-based wireless communication system (302) and a MSC-based wireless communication system (304), is disclosed. The handover method includes establishing a plurality of trunks (401) between a landline switch (316) and a MSC (317). The method also includes configuring a landline number routing table (403) and a landline trunk group table (404) in the landline switch (316), a mobile trunk group table (406) in the MSC (317), and establishing a message translation table (405) in the computing platform (312), such that one of the plurality of trunks and an associated signaling path to the computing platform (312) are always selected when the handover is required.

摘要翻译： 公开了一种用于在基于通用C的无线通信系统（302）和基于MSC的无线通信系统（304）之间切换与移动通信单元（116）相关联的通信信号（370）的方法和装置。 切换方法包括在陆线交换机（316）和MSC（317）之间建立多个中继线（401）。 该方法还包括在陆地交换机（316）中配置固定电话号码路由表（403）和陆线中继线组表（404），MSC（317）中的移动中继群表（406），以及建立消息转换 在计算平台（312）中的表（405），使得当需要切换时，总是选择多个中继线中的一个以及到计算平台（312）的相关信令路径。