Abstract: An electronic device may coordinate access to a shared communication channel with one or more other electronic devices. After receiving frames from the one or more other electronic devices with information specifying back-off values associated with at least an access category for the one or more other electronic devices in a subsequent potential slot transmission opportunity, the electronic device may update a stored list of known occupied back-off values for the subsequent potential slot transmission opportunity. Then, the electronic device may select and may transmit to the one or more other electronic devices an available back-off value for the electronic device in the subsequent potential slot transmission opportunity that is not included in the stored list and that is associated with an access category. Next, during a slot corresponding to the selected back-off value, the electronic device may transmit a second frame to at least another electronic device.

Abstract: An electronic device may coordinate access to a shared communication channel with one or more other electronic devices. After receiving frames from the one or more other electronic devices with information specifying back-off values associated with at least an access category for the one or more other electronic devices in a subsequent potential slot transmission opportunity, the electronic device may update a stored list of known occupied back-off values for the subsequent potential slot transmission opportunity. Then, the electronic device may select and may transmit to the one or more other electronic devices an available back-off value for the electronic device in the subsequent potential slot transmission opportunity that is not included in the stored list and that is associated with an access category. Next, during a slot corresponding to the selected back-off value, the electronic device may transmit a second frame to at least another electronic device.

Abstract: A network probe inserted between two nodes in point-to-point link synchronizes modes of operation between the two nodes. The probe utilizes IEEE 802.3u Clause 28 Auto-Negotiation to detect and advertise corresponding information regarding modes of operation for the nodes between which it is inserted in the point-to-point link, to achieve a highest priority common mode of operation between the nodes.

Abstract: A binary search machine, comprising an input line adapted to receive an input value, a first comparator adapted to provide an indication of a sub-portion of a database index covering a range including the input value; and one or more additional comparators, arranged in a cascade with the first comparator, such that each additional comparator is adapted to receive, from a previous comparator in the cascade, an indication of a first portion of the database index in which to search for the input value and to provide an indication of a sub-portion of the first portion, covering a range including the input value.

Abstract: A method of resolving a plurality of database queries. The method includes accumulating a plurality of queries, determining overlapping portions of the queries that relate to one or more common data attributes, resolving at least two of the determined overlapping portions of the queries together, and preparing responses to the queries based on the resolution of the at least two overlapping portions.

Abstract: A database server accelerator, comprising a plurality of query execution machines, adapted to resolve database queries, a plurality of respective memory units, adapted to cache data from the database, each memory unit being accessible only by its respective execution machine, and a data-manager adapted to determine the data to be cached in each of the plurality of memory units.

Abstract: A hardware unit for searching through a tree. The hardware unit includes a memory which stores a plurality of records, which describe the tree, an input interface adapted to receive an input string to be searched for in the tree and a hardware controller, which does not store an internal state, other than an optional position in the input string, adapted to determine a pointer related to the input string, if such a pointer exists.

Abstract: A method and apparatus for monitoring the performance of a dedicated communications medium in a switched data networking environment wherein a probe having a bypass circuit allows promiscuous monitoring of all traffic between a switch and a network device, such as a file server, in either direction, and in full duplex mode. Additionally, the bypass circuit eliminates the requirement for a separate repeater between the switch and the network device.

Abstract: A method and apparatus for monitoring the performance of a dedicated communications medium in a switched data networking environment wherein a probe having a bypass circuit allows promiscuous monitoring of all traffic between a switch and a network device, such as a file server, in either direction, and in full duplex mode. Additionally, the bypass circuit eliminates the requirement for a separate repeater between the switch and the network device.