Nordic Semiconductor Asa

Ola Marvik

Joel David Stapleton

Frank Berntsen

Lasse Olsen

Kenneth Megard

Ole Saether

Ole SÆTHER

Kenneth MEGÅRD

A system for streaming data packets, comprises a source device () having a radio transceiver (), and a receiving device () having a radio transceiver (). The source device () is configured to receive or generate a stream of data packets at a stream rate and to transmit, by radio, a succession of data frames, each data frame comprising a successive set of one or more data packets () from the stream that have not previously been transmitted. The receiving device () is configured to receive a data frame and to determine whether the one or more data packets () in the data frame have been correctly or incorrectly received and to transmit by radio an acknowledgement message () indicating that one or more of the data packets () has been correctly received and/or is configured to transmit by radio an acknowledgement message indicating that one or more of the data packets has been incorrectly received. The source device () is also configured such that, if the source device () determines that a data packet () has not been correctly received by the receiving device, the source device retransmits the data packet () in a subsequent data frame along with one or more data packets () from the stream that have not previously been transmitted. The source device () is further configured such that, if the source device does not receive an acknowledgement message () within an acknowledgement period after transmitting a data frame, the source device () retransmits the one or more data packets () from the data frame in one or more subsequent data frames along with respective one or more data packets () from the stream that have not previously been transmitted.

Streamed radio communication with ARQ and selective retransmission of packets in bursts

Synchronized radio transceivers Disclosed are a method of and apparatus for controlling a first radio transceiver () and a second radio transceiver () which are connected to a common oscillator (), wherein each transceiver () is capable of communicating with one or more remote radio transceivers (). The method comprises: &#x2022;the first transceiver () sending a synchronization signal to the second transceiver (); and &#x2022;the second transceiver () using the synchronization signal to ensure that neither transceiver () transmits data while the other transceiver is in a receiving state.

Synchronised radio transceivers

An integrated-circuit device () comprises a processor (), memory () for storing executable code, and memory protection logic (). The memory protection logic () is configured to: determine the state of a read protection flag for a protected region of the memory (); detect a memory read request by the processor (); determine whether the read request is for an address in the protected region of the memory (); determine whether the processor () issued the read request while executing code stored in the protected region of the memory (); and deny read requests for addresses in the protected region if the read protection flag for the protected region is set, unless at least one of one or more access conditions is met, wherein one of the access conditions is that the processor () issued the read requests while executing code stored in the protected region.

Memory protection

Growing community of inventors

Trondheim, Norway

Ola Marvik