Low collision random access using grouping nodes in underwater communications

Jongmin An, Hyeonsu Kim, Hojun Lee, Jeahak Chung
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引用次数: 2

Abstract

This paper proposes a random access method using grouping nodes which are located closely to decrease collisions of nodes by long delay propagation time in underwater acoustic environments. To reduce collision probability, each node selects its group, which is predetermined by a distance from the fusion center based on RSSI level, and aligns its transmission time to the farthest node in the group. To reduce collision in a node group, nodes choose their subcarriers to load their information based on the RSSI level. Computer simulations demonstrate that Reception Success Rate (RSR) of the proposed scheme has five times larger than that of conventional PN sequence random access. Maximum throughput of the proposed method also exhibits two times larger than the conventional PN codes.
水下通信中基于分组节点的低碰撞随机接入
为了减少水声环境中由于传播时间过长造成的节点碰撞,提出了一种利用节点位置紧密分组的随机访问方法。为了降低碰撞概率,每个节点根据RSSI水平选择与融合中心的距离预先确定的分组,并将自己的传输时间对准组中距离最远的节点。为了减少节点组中的冲突,节点根据RSSI级别选择子载波来加载它们的信息。计算机仿真结果表明,该方案的接收成功率(RSR)是传统PN序列随机接入的5倍。该方法的最大吞吐量是传统PN码的两倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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