Kabushiki Kaisha Toshiba

Stojan Denic

Georgios Kalogridis

Mahesh Sooriyabandara

Mohamed Rafiq Ismail

Stefanos Vatsikas

A method of processing data received over a channel includes receiving data representing probabilities associated with a plurality of variables and receiving a parity check matrix associated with a factor graph which includes variable nodes and check nodes connected by edges. After each exchange of messages between the variable nodes and check nodes, messages are calculated based on messages received at the variable nodes and permuted messages to be sent from the variable nodes in the next iteration are calculated by applying a permutation to the calculated messages. The permutation is of a set of permutations which map each codeword of the set of codewords onto a different codeword of the set of codewords. Soft values associated to variable nodes can be accumulated over two iterations of the message exchange processing.

Belief propagation decoding for short algebraic codes with permutations within the code space

A method of allocating energy resources in a network signalling node during an interval of time the network signalling node having internal processing components for maintaining operation of the node and relaying components for relaying data between other nodes in the network. The method comprises determining an amount of energy available for use by the node during the interval, determining a willingness parameter that defines the willingness of the node to supply energy to the relaying components during the time interval, determining, based on the willingness parameter, a portion of the available energy to allocate to the internal processing components during the time interval; and allocating the remainder of the available energy to the relaying components.

Allocating energy resources in a network signaling node

Metering of a physical characteristic is described, in which a stochastic approach is taken. A random signal is generated on the basis of a metering signal, with a view to maximising a statistical distance between the two. The random signal and the metering signal are mixed together to obscure characteristics of the metering signal which could otherwise divulge private information to third parties.

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Stojan Denic