信道和时隙分配算法对OFDM/TDMA多跳无线网络中数据丢失事件的影响

Vida Ferdowsi, K. Mitchell
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引用次数: 2

摘要

在本研究中,我们研究了信道和时隙分配算法对多跳无线网络中数据丢失事件的影响。我们研究了所有节点都有单个无线电天线,MAC层协议是同步OFDM,每个信道使用TDMA的网络。在这种网络中,可以通过保留数据时隙来避免数据冲突。当接收节点更改其分配的通道时,也可能发生数据丢失,因此它不能完全接收链路上的数据。我们称这种类型的丢失为数据损坏。仿真结果表明,如果有多个可用时隙可供保留,则需要适当的信道和时隙选择算法来防止数据损坏。因此,节点更改通道的频率越低越好,任何必要的更改都应该在适当的时候进行。在接收和发送模式之间切换也是如此,即切换模式也会导致数据丢失,因此应尽可能避免。在本研究中,我们提出了一种新的信道和时隙分配算法,以减少数据丢失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of channel and time-slot assignment algorithms on data loss events in OFDM/TDMA multi-hop wireless networks
In this study, we examine the effects of channel and time-slot allocation algorithms on data loss events in multi-hop wireless networks. We investigate networks where all nodes have a single-radio antenna, the MAC layer protocol is synchronized OFDM, and each channel uses TDMA. In such networks, data collisions can be avoided by reserving data time-slots. Data loss can also occur when a receiving node changes its assigned channel, hence it does not completely receive the data which is on the link. We call this type of loss data corruption. Our simulations show that if there are several available time slots to reserve, a proper channel and time-slot selection algorithm is required to prevent data corruption. Consequently, it is better that a node changes channels as infrequently as possible and any necessary change should take place at an appropriate time. The same is true about switching between receiving and sending modes, i.e. switching modes also leads to data loss, so it should be avoided whenever possible. In this study we propose a new algorithm to allocate channels and time-slots so as to decrease data loss.
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