Arm Limited

Izuma Tech, Inc.

Jarkko Paso

Mika Antero Tervonen

Juha Heiskanen

An extender device for communication in a multihop network comprises: a first wireless transceiver operable in electronic communication with a border router; a second wireless transceiver operable in electronic communication with one or more network attachable devices; and a routing component operable to cause said extender device to assume routing control of messages received at said first wireless transceiver for one or more said network attachable devices operable to handle messages having a specified identifier.

Multihop network routing extension

Provided is a machine-implemented method to send data from an electronic device, comprising positioning transmission of a packet in a channel slot preferred zone of a channel slot instance according to a statistical profile of at least one component of message flow in a network over which the packet is to be transmitted. The method may determine a statistical profile of components of the message flow and select at least one statistical profile as a basis for composing the channel slot preferred zone. The components of the message flow may comprise a sender electronic device, a network, a packet for transmission, a recurring channel slot and a receiver electronic device.

Positioning transmission of a packet

A machine-implemented method for controlling retry of unicast data packet transmission from a transmitter node to a receiver node comprises selecting a receiver node from a set of receiver nodes having different processing delays; transmitting a first unicast data packet to the receiver node; establishing a delay, at the transmitter node, for an expected acknowledgement wait duration; receiving, at the transmitter node, an acknowledgement packet from the receiver node; responsive to an actual acknowledgement wait duration being less than the expected duration, setting the expected duration to a new expected duration comprising at least the actual wait duration; transmitting a second unicast data packet to the receiver node; establishing a delay, at the transmitter node, for the new expected duration; and responsive to expiry of the new expected duration without receipt of an acknowledgement packet from the receiver node, retrying transmitting the second unicast data packet.

Adaptive wait in data communications

A technology is provided for operating a network-attachable electronic device, comprising attaching the electronic device to a frequency-hopping mesh network, the network having a synchronized broadcast channel schedule and an unsynchronized unicast channel schedule; deriving a common timing interval value of the network; establishing a subdivision of the derived common timing interval comprising alternating unicast transmit and receive slots based on a hierarchical position of the electronic device relative to a network root device; and at least one of transmitting and receiving at least one packet in a corresponding unicast transmit or receive slot with a one-hop network neighbour in a different hierarchical position relative to the network root device.

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Oulu, Finland

Jarkko Paso