Rambus Inc.

Clearspeed Technology Limited

Blu Wireless Technology Limited

Bluewireless Technology Limited

Ray McConnell

Paul Winser

Ken Cameron

Gordon Faulds

Dave Stuttard

Dave Williams

Eamon O'Dea

Phil Atkin

Tim Day

Trey Greer

John S Rhoades

Russell David

John Rhoades

Gajinder Singh Panesar

Anthony Spencer

Jeff Bond

Matthias Dejaegher

Danny Halamish

Simon McIntosh-Smith

Ifor Powell

Russel David

A technique for providing a synchronised clock signal across a wireless mesh network is described. The technique includes choosing one of a plurality received radio frequency signals to provide a synchronisation signal to which a local clock signal can be synchronised.

Clock synchronisation in wireless mesh communication networks

A technique for providing a synchronized clock signal across a wireless mesh network is described. The technique includes choosing one of a plurality received radio frequency signals to provide a synchronization signal to which a local clock signal can be synchronized.

Clock synchronisation in wireless mesh communications networks

A processing element comprises a plurality of function units () operable to execute respective functions in dependence upon received instructions in parallel with one another. An instruction controller includes an instruction register () having a plurality of register entries, each of which is operable to store an instruction word therein, and a plurality of instruction pipelines (). Each of the pipelines () is associated with a function unit (), and is operable to deliver instructions to the function unit concerned for execution thereby. Each pipeline also includes a timing controller operable to receive timing information for a received instruction, and to determine an initial location in the pipeline into which the instruction is to be loaded, and an instruction handler operable to receive an instruction for the function unit associated with the instruction pipeline concerned, and to load that instruction into the initial location determined by the timing controller.

Data processing

A processing element comprises a plurality of function units () operable to execute respective functions in dependence upon received instructions in parallel with one another. An instruction controller includes a plurality of instruction pipelines (). Each of the pipelines () is associated with a function unit () of the processing element, and is operable to deliver instructions to the function unit concerned for execution thereby. Each pipeline also includes a timing controller operable to receive timing information for a received instruction, and to determine an initial location in the pipeline into which the instruction is to be loaded, and an instruction handler operable to receive an instruction for the function unit associated with the instruction pipeline concerned, and to load that instruction into the initial location determined by the timing controller.

A plurality of processing elements (PEs) include memory local to at least one of the processing elements in a data packet-switched network interconnecting the processing elements and the memory to enable any of the PEs to access the memory. The network consists of nodes arranged linearly or in a grid to connect the PEs and their local memories to a common controller. The processor performs memory accesses on data stored in the memory in response to control signals sent by the controller to the memory. The local memories share the same memory map or space. The packet-switched network supports multiple concurrent transfers between PEs and memory. Memory accesses include block and/or broadcast read and write operations, in which data can be replicated within the nodes and, according to the operation, written into the shared memory or into the local PE memory.

Processor memory system

A data processing unit combines a scalar processor and a heterogeneous processor which includes a vector processing array. The vector processing array includes a plurality of vector processors which are operable in a single instruction multiple data configuration.

Data processing unit including a scalar processing unit and a heterogeneous processor unit

An array of a plurality of processing elements (PEs) are in a data packet-switched network interconnecting the PEs and memory to enable any of the PEs to access the memory. The network connects the PEs and their local memories to a common controller. The common controller may include a shared load/store (SLS) unit and an array control unit. A shared read may be addressed to an external device via the common controller. The SLS unit can continue activity as if a normal shared read operation has taken place, except that the transactions that have been sent externally may take more cycles to complete than the local shared reads. Hence, a number of transaction-enabled flags may not have been deactivated even though there is no more bus activity. The SLS unit can use this state to indicate to the array control unit that a thread switch may now take place.

Shared load-store unit to monitor network activity and external memory transaction status for thread switching

A data processing apparatus includes a plurality of processing elements arranged in a single instruction multiple data array. The apparatus includes an instruction controller operable to receive instructions from a plurality of instructions streams, and to transfer instructions from those instructions streams to the processing elements in the array, such that the data processing apparatus is operable to process a plurality of processing threads substantially in parallel with one another. A data transfer controller is provided which is operable to control transfer of data between the internal memory units associated with the processing elements, and memory external to the array.

Memory access consolidation for SIMD processing elements using transaction identifiers

A data processing apparatus includes a plurality of processing elements arranged in a single instruction multiple data array for processing data relating to graphical primitives. Vertex data relating to graphical primitives is used as feedback data for the processing elements for additional processing.

Parallel date processing apparatus

A parallel data processing apparatus using a SIMD array of processing elements is disclosed. The apparatus makes use of a register in order to control issuance of instructions to the processing elements in the array.

Data processing apparatus comprising an array controller for separating an instruction stream processing instructions and data transfer instructions

A method of processing data relating to geometrical primitives is disclosed. Each of the primitives has a plurality of vertices. The method uses a plurality of processing elements in parallel with one another, and comprises assigning respective vertex data to the processing elements, on each processing element, and in parallel with one another, performing at least one processing step on vertex data to produce processed vertex data, and transferring processed vertex data between processing elements so as to assemble primitive data.

Parallel data processing apparatus

A data processing architecture includes an input device that receives an incoming stream of data packets. A plurality of processing elements are operable to process data received from the input device. The input device is operable to distribute data packets in whole or in part to the processing elements in dependence upon the data processing bandwidth of the processing elements.

SIMD array operable to process different respective packet protocols simultaneously while executing a single common instruction stream

A data processor comprises a plurality of processing elements arranged for parallel processing of data, and a controller for controlling the plurality of processing elements. The controller is operable to determine respective status information for a plurality of processing threads, and to control processing of the processing threads by the plurality of processors in dependence upon such status information.

A controller operable to control an array of processing elements comprises a retrieval unit operable to retrieve instruction items for each of a plurality of instructions streams, each instruction stream having a plurality of instructions items, a combining unit operable to combine the plurality of instruction streams into a serial instruction stream, and a distribution unit operable to distribute the serial instruction stream to an array of processing elements.

A data processor comprises a plurality of processing elements arranged in a first plurality of single instruction multiple data (SIMD) processing arrays, and comprises a second plurality of controllers for transferring instructions to the processing arrays. Each controller is operable to retrieve a plurality of incoming instruction streams in parallel with one another and operable to supply incoming instruction streams to one of a plurality of processing arrays.

Plural SIMD arrays processing threads fetched in parallel and prioritized by thread manager sequentially transferring instructions to array controller for distribution

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Bristol, United Kingdom

Ray McConnell