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1. 发明授权

US5959974A System and method for discovering path MTU of internet paths 失效
标题翻译：发现互联网路径MTU的系统和方法
公开(公告)号：US5959974A
公开(公告)日：1999-09-28
申请号：US755864
申请日：1996-12-02
申请人： Daniel Edward Badt , David Richard Marquardt , Satyanarayana Billekal Rao , Lance Warren Russell , Larry Steven Wise
发明人： Daniel Edward Badt , David Richard Marquardt , Satyanarayana Billekal Rao , Lance Warren Russell , Larry Steven Wise
IPC分类号： H04L12/56 , H04L29/06 , H04L29/08 , H04M7/00 , G01R31/08
CPC分类号： H04L47/10 , H04L29/06 , H04L47/36 , H04L69/166 , H04L69/16 , H04L69/24 , H04L69/325 , H04M7/006
摘要： A local system issues an ICMP echo request packet with a size based on an initial PMTU value corresponding to that of the local system's interface MTU. When an ICMP needfrag error packet is received by the local system, this signifies that the initial PMTU value was too large for packets of corresponding size to be transmitted through the Internet without fragmentation. The value is accordingly decreased by the local system and a next ICMP echo request packet transmitted through the Internet. The process iterates until an ICMP echo request packet is successfully transmitted through the Internet to a target system. In response thereto, the target system transmits an ICMP echo response packet back through the Internet to the local system, thereby indicating that the last-sent ICMP echo request packet from the local system had the correct PMTU value which is thereafter assumed to be the correct PMTU.
摘要翻译：本地系统发布基于与本地系统接口MTU对应的初始PMTU值的ICMP回显请求报文。当本地系统接收到ICMP需要的报文错误报文时，表示初始的PMTU值对于相应大小的报文来说太大，无法通过因特网进行传输。因此本地系统和通过因特网传输的下一个ICMP回显请求报文相应地减小了该值。该过程迭代直到ICMP回显请求分组通过因特网成功传输到目标系统。响应于此，目标系统通过因特网向本地系统发送ICMP回应响应分组，从而指示来自本地系统的最后发送的ICMP回应请求分组具有正确的PMTU值，其后被认为是正确的 PMTU。

2. 发明授权

US5892753A System and method for dynamically refining PMTU estimates in a multimedia datastream internet system 失效
标题翻译：用于在多媒体数据流互联网系统中动态地提炼PMTU估计的系统和方法
公开(公告)号：US5892753A
公开(公告)日：1999-04-06
申请号：US755867
申请日：1996-12-02
申请人： Daniel Edward Badt , David Richard Marquardt , Satyanarayana Billekal Rao , Lance Warren Russell , Larry Steven Wise
发明人： Daniel Edward Badt , David Richard Marquardt , Satyanarayana Billekal Rao , Lance Warren Russell , Larry Steven Wise
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04L47/36
摘要： A local system issues an ICMP echo request packet with a size based on an initial PMTU value corresponding to that of the local system's interface MTU. When an ICMP needfrag error packet is received by the local system, this signifies that the initial PMTU value was too large for packets of corresponding size to be transmitted through the Internet without fragmentation. The value is accordingly decreased by the local system and a next ICMP echo request packet transmitted through the Internet. The process iterates until an ICMP echo request packet is successfully transmitted through the Internet to a target system. In response thereto, the target system transmits an ICMP echo response packet back through the Internet to the local system, thereby indicating that the last-sent ICMP echo request packet from the local system had the correct PMTU value which is thereafter assumed to be the correct PMTU. An MTU application, MTU table, and corresponding application program interfaces and controls are provided in the system for dynamically maintaining PMTU value estimates and for providing next estimates of PMTU. These next estimates are accessed from the table in next ICMP echo request packet transmissions when an ICMP needfrag error packet does not contain an MTU value returned from a router in the Internet.
摘要翻译：本地系统发布基于与本地系统接口MTU对应的初始PMTU值的ICMP回显请求报文。当本地系统接收到ICMP需要的报文错误报文时，表示初始的PMTU值对于相应大小的报文来说太大，无法通过因特网进行传输。因此本地系统和通过因特网传输的下一个ICMP回显请求报文相应地减小了该值。该过程迭代直到ICMP回显请求分组通过因特网成功传输到目标系统。响应于此，目标系统通过因特网向本地系统发送ICMP回应响应分组，从而指示来自本地系统的最后发送的ICMP回应请求分组具有正确的PMTU值，其后被认为是正确的 PMTU。在系统中提供MTU应用，MTU表和相应的应用程序接口和控制，用于动态维护PMTU值估计和提供PMTU的下一个估计。当ICMP需要帧错误分组不包含从因特网中的路由器返回的MTU值时，从下一个ICMP回显请求分组传输中的表中访问这些下一个估计。

3. 发明授权

US5812767A System for user registering an address resolution routine to provide address resolution procedure which is used by data link provider interface for resolving address conflicts 失效
标题翻译：用于用户注册地址解析程序以提供地址解析过程的系统，由数据链路提供者接口用于解决地址冲突
公开(公告)号：US5812767A
公开(公告)日：1998-09-22
申请号：US815757
申请日：1997-03-12
申请人： Saurabh Desai , Jessie Ann Hays Haug , Gregory Scott Joyce , Lance Warren Russell , Larry Steven Wise
发明人： Saurabh Desai , Jessie Ann Hays Haug , Gregory Scott Joyce , Lance Warren Russell , Larry Steven Wise
IPC分类号： H04L29/06 , H04L29/12 , G06F13/00
CPC分类号： H04L29/12018 , H04L29/06 , H04L29/12009 , H04L61/10 , H04L69/18
摘要： An information handling system includes a number of stations connected in a network configuration, each station including a processor, a storage and an I/O controller, where the processor operates under control of an operating system control program which is divided into a user (application) space and a kernel (system) space, the kernel may include a protocol layer interfacing the user application to a DLPI in the kernel, a DLPI which interfaces between the protocol module and a device driver interface, a device driver and a hardware device for connecting the station to the network. When data is to be received by a station from the network, the following steps are performed in the DLPI: recognize the network interface type (FDDI, Ethernet, Token Ring, etc.); recognize the protocol being used; format data according to the protocol; transmit to a Data Link Services user if address resolution is not required; if address resolution is required, test to determine if the protocol address resolution routine is registered; if registered, transmit data to the Data Link Services user; if not registered, call the default address resolution routine to resolve address and then transmit data to protocol module. When data is to be transmitted from a station to the network, the following steps are performed in the DLPI: recognize the network interface type (FDDI, Ethernet, Token Ring, etc.); recognize the protocol being used; test for registered address resolution routine; if not registered, call the default address resolution routine; if registered, call the registered address resolution routine; and call the device driver to, output the data to be transmitted to the network.
摘要翻译：信息处理系统包括以网络配置连接的多个站，每个站包括处理器，存储器和I / O控制器，其中处理器在分为用户（应用程序）的操作系统控制程序的控制下操作）空间和内核（系统）空间，内核可以包括将用户应用程序连接到内核中的DLPI的协议层，在协议模块和设备驱动程序接口之间接口的DLPI，设备驱动程序和硬件设备将站点连接到网络。当站点从网络接收数据时，在DLPI中执行以下步骤：识别网络接口类型（FDDI，以太网，令牌环等）; 识别使用的协议; 根据协议格式化数据; 如果不需要地址解析，则传送给数据链路服务用户; 如果需要地址解析，则测试以确定协议地址解析例程是否被注册; 如果注册，则将数据传输到数据链路服务用户; 如果未注册，请调用默认地址解析例程来解析地址，然后将数据发送到协议模块。当数据要从站传输到网络时，在DLPI中执行以下步骤：识别网络接口类型（FDDI，以太网，令牌环等）; 识别使用的协议; 测试注册地址解析程序; 如果没有注册，请调用默认地址解析程序; 如果注册，请调用注册地址解析程序; 并调用设备驱动程序，输出要发送到网络的数据。

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