| 摘要 |
PURPOSE: A wireless multimedia sensor network and a data compression and transmission method thereof are provided to extend the life span of a network by evenly consuming energy of each node, which is distributed in a network, through multiple path transmission. CONSTITUTION: A data collection node collects data about nodes which are passed through while multimedia data is transmitted to a base station. The data collection node determines the number of data partitioning which is transmitted via each node according to residual energy of each node which is located on the data transmission path. The data collection node partitions and compresses data using a Chinese remainder theorem based on the number of data partitioning. The data collection node transmits data through multiple paths based on collected node data at a network initialization stage. [Reference numerals] (AA) Start; (BB) Transmit a sensor network initialization message[Base station→Entire sensor node]; (CC) Add information to the sensor network initialization message and transmit the message; (DD) Update Data transmission table(Via-node table)[Initialization message receiving node]; (EE) No; (FF) Initialize the entire node?; (GG) Yes; (HH) Set a maximum via-level(Entire sensor node); (II) Collect multimedia data(Entire sensor node); (JJ) Request to collect residual energy of the maximum via-level[Data collection node→Maximum via-level node]; (KK) Response the residual energy of the maximum via-level[Maximum via-level node→Data collection node]; (LL) Set the number of message division based on the collected residual energy[Data collection node]; (MM) Perform a Chinese Remainder Theorem[Data collection node]; (NN) Add a bit-division identifier to the divided message; (OO) Transmit data via multiple routes[Data collection node→Base station]; (PP) Reconstruct original data using the Chinese Remainder Theorem[Base station] |
