存储网格中数据高可靠获取的新编码方案*

为了保证存储网格中数据的高可获取性，提出了一种对数据资源进行RS编码和LT编码级联的新方法，使RS码和LT码互相促进，同时实现纠删和纠错，这是单独采用两种编码都无法达到的。仿真结果表明，RS-LT级联编码可提高LT码译码成功概率，能够以较小的系统代价大幅度提高数据的可获取性。

Novel coding scheme for robust distributed data retrieval in storage grid

In order to ensure data availability in storage grid,this paper proposed a novel concatenated code scheme that combined RS code and LT code for distributed data.The RS code and LT code promoted each other, realizing error correcting and erasure correcting at the same time,which was hard to be realized using any of RS code or LT code. The results of simulation indicate that the RS-LT concatenated code can improve the LT code correctly decoding probability and the scheme is effective in improving data availab...