DTN中基于解码预判的高效低时延数据传输算法

针对延迟容忍网络（DTN）中编码节点受限的数据传输机制（Hubcode）存在网络开销大、解码时延长的问题，该文提出一种基于解码预判的高效低时延数据传输算法（HLDA）予以解决。HLDA算法提出了hub节点解码预判新机制以减少数据包的端到端传输时延。通过提出单播、广播混合传输新机制减少beacon信息包的广播次数，从而减少网络开销；并提出减少编码系数矩阵交互机制，更进一步地减少网络开销。仿真结果表明，该算法能够有效降低网络开销，减少端到端的时延。

A High-efficiency and Low-Delay Data Transmission Algorithm in DTN Based on Decoding Anticipate

A high-efficiency and low-delay data transmission algorithm based on decoding anticipate (HLDA) is proposed to address the problems that there exist large overhead for broadcasting beacon which carrys coding coefficient matrix and the destination nodes wait a long time to decode in the hub-based forwarding using network coding in delay tolerant networks(DTN). The HLDA proposed a new mechanism of anticipating decoding by hub nodes is presented in HLDA to decrease the end-to-end delay and proposed a unicast and broadcast mixing mechanism to decrease the overhead. By decreasing the coding coefficient matrix interaction mechanism to further reduce overhead. Simulation results show that HLDA can reduce the overhead and average end-to-end delay as compared to the Hubcode.