Abstract: A method of configuring a network device for key sharing, the method comprising obtaining (410) in electronic form at least two parameter sets, a parameter set comprising a private modulus (p1) a public modulus (N), and a bivariate polynomial (f1) having integer coefficients, the binary representation of the public modulus and the binary representation of the private modulus are the same in at least key length (b) consecutive bits, generating local key material for the network device comprising obtaining (420) in electronic form an identity number (A) for the network device, and for each parameter set of the at least two parameter sets obtaining a corresponding univariate polynomial, by determining, using a polynomial manipulation device, a univariate polynomial from the bivariate polynomial of the parameter set by substituting (430) the identity number into said bivariate polynomial, and reducing the result of the substitution modulo the private modulus of the parameter set, and electronically storing (450)

Abstract: A computer system comprising a processor and a memory, the processor comprising an instruction cycle circuit configured to repeatedly obtain a next instruction of a computer program, an instruction decoder configured to decode and execute the instruction obtained by the instruction cycle circuit, the computer system supporting multiple arithmetic and/or logic operations under control of one or more of the instructions, wherein the memory stores multiple tables, each specific one of the multiple arithmetic and/or logic operations being supported by a specific table stored in the memory, each specific table comprising the result of the specific arithmetic operations for a range of inputs.

Abstract: A computing device configured to compute a data function (f) on a function-input value (w), the device comprising an electronic storage storing a first table network configured for the data function (f), the computing device comprising an electronic processor coupled to the storage and configured to obtain multiple first table inputs for the first table network, the multiple first table inputs (x=E(w, s)) including the function-input value (w), and to compute the data function (f) by applying the first table network to the multiple first table inputs (x) to produce multiple first table outputs (u=E(f(w), g(w,s)), the multiple first table outputs (u) including a function-output value (f(w)), the function-output value (f(w)) corresponding to the result of applying the data function (f) to the function-input value (w), the electronic storage is further storing a second table network configured to cooperate with the first table network for countering modifications made to the first table network, the electronic p

Abstract: A compiler 134 for compiling a first computer program 110 written in a first computer programming language into a second computer program written in a machine language, the compiler comprises a code generator to generate the second computer program by generating tables 142 and machine language code 144, the generated tables and the generated machine language code together forming the second computer program, wherein the generated machine language code references the tables and the generated machine language code does not contain arithmetic or logic machine instructions, the tables comprising pre-computed results of arithmetic and/or logic machine instructions.

Abstract: The present invention relates to a method and apparatus for controlling power distribution by a control system that only requires a broadcast medium between a controller (30) and appliances or loads (20-1 to 20-n) and information about the current total power consumption of the system to precisely reach a target consumption level in a stepwise, fast converging way without “seesaw”effects and with “fair distribution” of any power reduction.

Abstract: A method for wireless communication in a network comprising a resource-restricted device (ZGPD), at least two proxy devices (ZP1, ZP2) and at least one destination device (DD), wherein the method comprises the following steps: the resource-restriced device transmitting a frame to be forwarded to a destination device in the network, said frame containing a unique source identifier of the resource-restricted device, at least one proxy device receiving the frame and identifying the frame as originating from a resource-restricted device, —the proxy device determining the unique source identifier and deriving a group identifier as a known function of the unique source identifier, the group identifier designating a group of devices in the network or a source address, the proxy constructing, from the frame, an appropriate packet to be forwarded, the proxy forwarding the packet by taking into account the group identifier.

Abstract: A first communication unit (101) comprises: a processor (203) for obtaining local key material defining a first key generating function from a Trusted Third Party (TTP). An identity processor (205) obtaining an identity for a second communication unit (103 and a key generator (207) determines a first cryptographic key from the first key generating function based on the identity. A generator (209) locally generates a perturbation value which is not uniquely determined by data originating from the TTP. A key modifier (211) determines a shared cryptographic key by applying the perturbation value to the first cryptographic key. The second communication unit (103) also obtains key modifying data and uses it to determine a cryptographic key for the first communication unit (101). It then generates possible values of the perturbation value, and subsequently possible shared cryptographic keys. It then selects one that matches cryptographic data from the first communication unit (101).

Abstract: Energyharvesting device The present invention relates to a very simple and robust wireless batteryless device (100) for harvesting energy. The actuation upon button pressure/release results in a rotation of a first member (1) around its central axis (11) leading to a move of an element (3), which is loosely fixed at the first member (1) from a pivot point (14), and a rotation around the central axis (11) of the second member (2) to which a generator axis of an energy harvester is coupled, the rotation axis of the generator being coincident with the central axis (11). Upon full pressure/release, the element (3) is forced to rotate around the pivot point (14), allowing a vertically raised pin (22) of the second member (2) to disengage a recessed area (31, 32) at each end of a slot (30) of the element (3) and the second member (2) to rotate to its rest position.

Abstract: The invention relates to a proxy node comprising means for managing a proxy table, a receiver for receiving a message from a first resource restricted device, said message being intended to at least one corresponding destination device, control means for checking whether an entry for the first resource restricted device is included in the set of entries of the proxy table, the set of entries of the proxy table indicating the set of resource-restricted devices the proxy node is in charge of, a transmitter for forwarding the message depending on the result of the proxy table checking, the means for managing the proxy table being arranged for cleaning the proxy table of the entry relative to the resource-restricted device by monitoring the relative usage of the proxy node for forwarding messages for the resource restricted device with the usage of competitor proxy nodes for forwarding messages for the resource restricted device.

Abstract: A system for wireless communication in a network includes: a resource-restricted device transmitting a data frame to be forwarded to a destination device in the network, wherein the data frame includes a source identifier of the resource-restricted device, wherein the source identifier is not a valid network address for the network; a proxy device receiving the data frame from the resource-restricted device, deriving a network address for the resource-restricted device as a function of the source identifier of the resource-restricted device, and constructing, from the data frame, a packet to be forwarded to at least the destination device. Constructing the packet involves: including, in the packet, data from the data frame, and including, in the packet, the derived network address for the resource-restricted device as a source address for the packet. The proxy device associates a delay to the packet, and schedules transmission of the packet after the delay.

Abstract: Methods are provided for transmitting and receiving a message to or form a wireless limited node (10) in a wireless network (100) wherein the wireless limited node (10) is related to a coupled device (30) in the wireless network (100) and is able to receive data only within limited reception opportunities following transmission by the wireless limited node (10). The method of transmitting comprises noticing a need for transmitting the message to the wireless limited node (10), preparing the message to be transmitted, the coupled device (30) changing a physical parameter for triggering external activation of the wireless limited node (10), and after receiving a signal transmitted by the wireless limited node (10) upon said external activation, sending the message to be transmitted to the wireless limited node (10) within the limited reception opportunities. The method of receiving does not comprise the steps of preparing the message and transmitting it to the wireless limited node (10).

Abstract: A switch device (10) and method for generation of energy for operating the switch device (10), wherein the switch device (10) is provided with a drive unit (120) interacting with an actuation device operable by a user, and with a moving device (130) configured to be set in motion by the drive unit (120), and with an energy harvester (132, 140, 140a) for providing energy to the switch device (10) in dependence on a motion of the moving device (130), such that energy for commands or other operations is provided to the switch device (10). The moving device (130) is configured to be repeatedly repositioned in relation to a defined zero position, as long as it has kinetic energy, in order to provide kinetic energy which can be converted in electric energy by the energy harvester (132, 140, 140a). Such an electromechanical device for generating energy can ensure wireless operation of the switch device (10) without the need of batteries or any other kind of power supply.

Abstract: An electro-mechanical energy harvesting switch configured to provide at least two different control signals comprises: a generator activating member (9) configured to move between a rest position and a maximum loaded position; at least one spring (11, 13) configured to force the generator activating member towards the rest position; and a unidirectionally rotating protrusion member (17) comprising at least one protrusion (21) configured to move through a protrusion's path during rotation of the protrusion member (17), through a first position of the protrusion (21), in which first position the protrusion (21) is engaged with the generator activating member (9) in the rest position, and through a second position, the protrusion (21) thereby carrying the generator activating member (9) from the rest position to the maximum loaded position against the force of the at least one spring (11, 13).

Abstract: This invention relates to a method for configuring a limited node in a network, said limited node being able to receive data only within limited reception opportunities, the method comprising at a first node: (a) detecting that an update of a network configuration parameter value for the limited node is required; (b) deciding on whether to change a limited node behaviour from a first behaviour based at least partly on communication characteristics of the limited node, said change of behaviour including increasing reception opportunity at the limited node; (c) depending on decision at step (b), triggering delivery of a request of behaviour change to the limited node during a first reception opportunity; (d) triggering delivery of the updated network configuration parameter value to the limited node during a second reception opportunity of the limited node.

Abstract: The present invention relates to a method for configuring a network comprising a maintenance entity and a plurality of nodes, the method comprising at the maintenance entity, the steps of: (a) detecting a potential presence in the network of at least one limited node, said limited node being able to receive data only within time periods; (b) determining that an updated network configuration parameter value is required, said network configuration parameter being common to the at least one limited node and to the plurality nodes of the network; (c) postponing a transmission of a signal for updating the network configuration parameter value at the plurality of nodes, based on the detection of the potential presence of the at least one limited node in the network; (d) transmitting a triggering signal for triggering delivery of the updated network configuration parameter value to the limited device; (e) transmitting the signal for updating the updated network configuration parameter value at the plurality of nodes

Abstract: The invention relates to controlling power consumption of a group of plurality of groups of power consuming devices by determining power consumption control value for controlling power consumption of devices of the group by use of at least one of the following: load shedding flexibility value of at least one group of plurality of groups, wherein the load shedding flexibility value of the corresponding group indicates maximum amount of power, by which power consumption of devices of the corresponding group can be reduced such that minimum power consumption permissible in the corresponding group is maintained; load restoration flexibility value of the at least one group of plurality of groups, wherein the load restoration flexibility value of the corresponding group indicates maximum amount of power, by which the power consumption of devices of the corresponding group can be increased such that maximum power consumption permissible in the corresponding group is maintained.

Abstract: The present invention relates to a method for determining an operational channel c_op of a communication network comprising at least two potential proxies for an energy-restricted device to join the network, and a set C of radio channels, wherein an energy-restricted device is to join the network, the method comprising the following steps: —the energy-restricted device transmitting a first beacon message on a first channel succ(m?1)(c)in MAC broadcast, wherein c belongs to the set C, and switching to receiving mode on channel listen(c), wherein succ and listen is an arithmetical function, from C to C, and m is a positive integer, —the proxies receiving the beacon message sent on channel succ(m?1)(c), —the temporary master device switching its radio receiver to channel succm(c), —the energy-restricted device transmitting a second beacon message on a second channel succ(c) and switching to receiving mode on channel listen (succm(c)), —upon receipt of the second beacon, the temporary master device transmitting a

Abstract: A method for wireless communication in a network comprising a resource-restricted device (ZGPD), at least two proxy devices (ZP1, ZP2) and at least one destination device (DD), wherein the method comprises the following steps: the resource-restriced device transmitting a frame to be forwarded to a destination device in the network, said frame containing a unique source identifier of the resource-restricted device, at least one proxy device receiving the frame and identifying the frame as originating from a resource-restricted device,—the proxy device determining the unique source identifier and deriving a group identifier as a known function of the unique source identifier, the group identifier designating a group of devices in the network or a source address, the proxy constructing, from the frame, an appropriate packet to be forwarded, the proxy forwarding the packet by taking into account the group identifier.

Abstract: A method for wireless communication in a network comprising a resource-restricted device, and at least one proxy device, wherein the method comprises the following steps:-the resource-restricted device (ZGPD) transmitting a frame containing source identifier to be forwarded to a destination device in the network,-the proxy device (ZP5) receiving the frame,-the proxy constructing, from the frame, a packet to be forwarded to the destination device,-the router device associating a delay to the packet and scheduling forwarding of the packet after this delay, wherein the step of constructing a packet from the frame comprises deriving source-related information from the received packet and including this information in the packet.

Abstract: An apparatus (1001), system (1000) and method (800-900) are provided for improving the de-encapsulation of sections from Multi Protocol Encapsulation (MPE) (151) and Multi Protocol Encapsulation-Forward Error Correction (MPE-FEC) (152) Sections in a DVB-H transport stream. DVB-H is a standard for broadcasting services to hand-helds. Its difference from DVB-T, C, and S that is relevant for this invention is the presence of an additional layer of Forward Error Correction (FEC). Instead of restoring only correctly received sections (151) (152) the present invention also restores fragments of sections (151) (152) by using both Transport Stream packet headers (301. i.1) and section headers (151.1). As a result, entire sections (800-900) may not be erased (which can amount to up to 4080 bytes) whenever one or more fragments are received incorrectly, but only the incorrectly received fragments (which can be each up to 184 bytes) are erased.