Artimi Ltd

Conexant Systems, Inc.

Brooktree Broadband Holding, Inc.

Virata Corporation

Staccato Delaware, Inc.

Mark Justin Moore

David Stuart Baker

Brian James Knight

Gavin J Stark

Jack Arnold Lang

A method is described that comprises suspending a currently executing thread at a periodic time interval, calculating a next time slot during which the currently executing thread is to resume execution, appending the suspended thread to a queue of threads scheduled for execution at the calculated time slot, and updating an index value of a pointer index to a next sequential non-empty time slot, where the pointer index references time slots within an array of time slots, and where each of the plurality of time slots corresponds to a timeslice during which CPU resources are allocated to a particular thread. The method further comprises removing any contents of the indexed non-empty time slot and appending the removed contents to an array of threads requesting immediate CPU resource allocation and activating the thread at the top of the array of threads requesting immediate CPU resource allocation as a currently running thread.

System and method for scheduling threads requesting immediate CPU resource in the indexed time slot

An operating system is provided wherein a plurality of objects are established and registered in response to requests from hardware or software associated with the computer system. The objects include at least one type, at least one attribute, and a handle. The plurality of objects are then manipulated to effect processing and exchange of information.

Systems and methods for managing shared resources in a computer system

A circular array structure is maintained having multiple time slots, where each time slot corresponds to a timeslice during which CPU resources are allocated to a particular thread. The time slots in the circular array include a queue of threads scheduled for execution during that time slot. A pointer index and an array of threads requesting immediate CPU resource allocation are maintained. A currently executing thread is suspended, and a next time slot during which the currently executing thread should resume execution is calculated. The suspended currently executing thread is appended to the queue of threads scheduled for execution at the calculated time slot. The pointer index is undated to point to the identified next sequential non-empty time slot. Any contents of the indexed time slot is appended to the array of threads requesting immediate CPU resource allocation. The thread at the top of the array is removed and activated.

System and method for scheduling thread execution

This invention generally relates to networks of communications devices, in particular ultra wideband (UWB) communications devices. An ultra-wideband (UWB) network comprising a plurality of UWB devices each forming a node of said network, pairs of said UWB devices being configured for communication with one another using one of a plurality of UWB channels, each said UWB device comprising a UWB transceiver for bidirectional communication over one or more of said UWB channels with at least one other of said UWB devices; and a device controller coupled to said UWB transceiver, said controller being configured to determine a said UWB channel for use in establishing a communication link with each other UWB device; whereby said network is configured for automatic construction of a set of communications links between said nodes of said network.

Communications systems and methods

This invention relates to systems and methods for wireless and wired optical data communications, in particular infrared data communications using techniques borrowed ultra wideband (UWB) radio. An optical data communications receiver for receiving data encoded using optical pulse position, the receiver comprising: an optical signal reception device; a reference signal memory for storing a reference channel response signal; and a correlator coupled to said reference signal memory and to said optical signal reception device for correlating a received optical pulse with said stored reference channel response signal to determine said optical pulse position; an output coupled to said correlator to provide pulse position data for said received optical pulse.

This invention generally relates to wired and wireless ultra wideband (UWB) data communications apparatus and methods, and in particular to UWB receiver systems and architectures. An ultra wideband (UWB) receiver system comprising: a receiver front end to receive a UWB signal; an analogue-to-digital converter coupled to said receiver front end to digitize said received UBW signal; and a correlator coupled to said analogue-to-digital converter to correlate said digitized UWB signal with a reference signal.

Described herein are ultra wideband (UWB) receiver systems, and applications thereof. Such a UWB receiver includes a receiver front end and a correlator coupled to the receiver front end. The receiver front end is configured to receive a UWB signal having a plurality of multipath components. The correlator is configured to correlate the UWB signal with a reference signal. The UWB signal includes a plurality of pulses, wherein each pulse has a plurality of multipath components. The reference signal also includes a plurality of multipath components of the pulse. The correlator includes at least one correlator module configured to correlate a plurality of the multipath components of the pulse with the reference signal.

A method and apparatus for scheduling the transmission of cells onto an network, or other packet switching network, is disclosed. The central feature of the scheduling mechanism is a multi-functional timing ring which accommodates both preallocated static scheduling for use with CBR and real-time VBR virtual circuits, and dynamic scheduling for use with ABR, UBR, and non-real time VBR virtual circuits. The timing ring, in which cell transmissions are defined as actions, is processed sequentially in a burst fashion. Static actions are always performed at their allocated time intervals, so fixed transmission intervals can be guaranteed for CBR and real-time VBR traffic. Dynamic actions are moved from the timing ring to a latent queue, which permits dynamic actions to be performed during their scheduled time slot or during the first available time slot thereafter. This mechanism permits ABR and non-real-time VBR traffic contracts to be maintained.

Growing community of inventors

Cambridge, United Kingdom

Mark Justin Moore