摘要:
A trie searching technique employs entries each including a pointer to the next block in the search and a status indication and also including start and end indexes which define a selected section of the trie key identifying an entry within the block identified by the pointer. Thereby the program for selection of the search key is defined by the trie entries themselves, enabling a general variety of search selections and jumps to avoid any unnecessary parts of the trie search key.
摘要:
A sub-system for forming part of a packet-data communication system for the transmission of data packets which contain media access control addresses and protocol addresses. The sub-system comprises a multiple-port network switch for forwarding data packets in response to an examination of the packets on the basis of the packets protocol addresses, and for performing said examination when a destination address in the packet corresponds to the media access control address of the switch, the switch being arranged for forwarding a packet on the basis of a media access control address therein when the destination address of the packet does not correspond to the media access control address of the switch, said switch including a forwarding database which comprises entries which relate a protocol address with a media access control address and an identification of a particular port of the switch. This switch may perform routing within a local-area network. The switch is configured so that protocol addresses may not be learned in the database in respect of the particular port. A network router, which may perform routing functions in respect of a wide-area network, is connected to the switch only by way of the particular port. The sub-system enables the switch to off-load from the router routing functions for the local-area network.
摘要:
A network switch including a port for the reception and transmission of data packets, and a receive buffer store connected to the port, detecting a predetermined state of fullness of the buffer store, initiating in response to the state of fullness the production of control frames for signaling to a source of packets to pause the sending of packets to the switch, counting said frames to obtain a measure of congestion of the switch, and responsive to a rate of change of measure to enable the discarding of packets received by the buffer when rate is higher than a first predetermined value and to disable the discarding of packets when the rate of change of the measure is below a second predetermined value.
摘要:
A content management system may assist users in managing consumption of content, such as television programs. Primary content may be segmented into portions, where a secondary content is interspersed between a first portion and a second portion of the primary content. The first portion and the second portion may be aggregated sequentially.
摘要:
Systems and methods of controlling and optimizing system latency in order to minimize system latency between remotely operating computing devices over a communications network are disclosed. A method of controlling and optimizing latency over a computer network from a first computing device to a second computing device includes identifying a condition associated with the transmission of a video signal, receiving the video signal at a computing device, determining whether the condition is met after receiving the video signal, and displaying the video signal on a display device when the condition is met.
摘要:
Access of a malfunctioning server to a data storage facility is blocked. Characteristics such as IAmAlive signals from a server are monitored and when out of profile a malfunction is indicated and data access of that server is inhibited. Characteristics continue to be monitored for a return from the malfunction. The system can be used in a resilient cluster of servers to shut out a malfunctioning server and enable its recovery to be indicated so as to enable readmittance to the cluster.
摘要:
A forwarding database in a network switch is established and maintained by performing a look-up for a source address read from an incoming frame to find a match between the source address in the frame and the source address in an entry which includes that source address, a port number and an age field. New entries are made if matches are not found, so that the forwarding database facilitates the dispatch of frames to destination addresses corresponding to source addresses in the table. The switch maintains a system age, such as a two-bit field, which is changed from time to time and the current system age is entered in the table as the age field when a source address entry is made. When said source address is found by a look-up process, it is updated with the current system age only if the age field of the entry and the current system age do not correspond. There is a saving of bandwidth arising from the avoidance of write cycles when an age field of an entry corresponds to the current system age.
摘要:
A health care information provider system may provide information about health care objects managed by a health care provider. A name generating system may generate an object name for each of the health care objects which may include provider information indicative of the identity of the health care provider which manages the health care object, and object information indicative of the identity of the health care object. The object information may be devoid of any personal health information, even in a form which can be decrypted by a decryption key.A computer system appliance may protect the privacy of medical record information stored in a computer information storage system and may include a medical record distribution compartment, a medical record acquisition compartment, and a security compartment. The medical record distribution compartment and the medical record acquisition compartment may be configured to communicate with one another only thought the security compartment.
摘要:
In a virtualized desktop system, a digital user station communicates with an interfacing module coupled to a target device via a network. The digital user station controls the power of the target device and the interfacing module by determining the power status of the interfacing module and sending a power control packet to the target device the interfacing module is coupled to.
摘要:
A wireless classroom response system wireless network is located proximate to a classroom, a base station that coordinates the activities of the wireless network, and a plurality of handheld units. Each handheld unit is associated with an attendee of a class (either on a long-term or “owned basis, or on an ad-hoc or “shared” basis). Each handheld unit performs a discovery process that includes the steps of randomly choosing a wireless channel, attempting to discover the presence of the wireless network on the channel, and repeating these two steps if no wireless network is discovered.