Nokia Technologies Oy

Nokia Solutions and Networks Oy

Guangyue Lu

Jingyu Feng

Shaoqing Lv

Embodiments of the present disclosure relate to identifying collusive attackers in mobile crowdsourcing. According to embodiments of the present disclosure, the crowdsourcing behaviors of each device is abstracted as a binary variable and the similarity between any two device is measured, which result in less complex and lightweight in mathematical computation.

Mechanism for identifying collusive attackers

A method comprises: receiving, by a second node, a new transaction to be recorded to a block in a blockchain (), determining, by the second node, based on an identity of the block that the second node is one of a subset of block managers in the blockchain to store the block (), adding the block to the blockchain responsive to the determination () and transmitting a block list, wherein the block list comprises information about the block ().

Distributed storage of blocks in blockchains

The present invention involves a method for distributed dynamic spectrum allocation performed by a source device and the source device, a method for dynamic spectrum allocation performed by a power node and the power node, the method including sending to appropriate power nodes a query message indicating that the source device requests to find an idle licensed spectrum; receiving from the appropriate power nodes a query response message indicating licensed spectrums; and determining whether the licensed spectrums are idle and selecting an idle licensed spectrum from the licensed spectrums to be used. In this way, the provided method may implement distributed dynamic spectrum allocation without using a central authority.

Growing community of inventors

Shaanxi, China

Guangyue Lu