我正在尝试使用Contiki 3.0和Cooja模拟器对RPL协议进行一些模拟。我正在使用天空微尘,我想看看DODAG是如何形成的,并使用Collect View监控网络的参数。我有几个问题:
1)我可以在哪里以及如何更改目标函数?
2)我的传感器有1 My的能耗,我认为对于实际应用来说太多了,因为传感器需要工作几年。
3)我可以在哪里更改模拟的其他参数?比如Tx/Rx数据包?
4)如何解释collect视图中给出的路由指标?
5)我注意到当我改变一个节点的位置时,网络检测移动的速度太慢了,RPL不是很快,但是在Cooja中它需要太多的时间,这可能吗?你对模拟移动传感器有什么建议吗?
发布于 2019-05-19 00:54:50
1)您可以从contiki/core/net/rpl/rpl-conf.h设置更改目标函数
根据您的需求进行编辑:
/*
* The objective function (OF) used by a RPL root is configurable through
* the RPL_CONF_OF_OCP parameter. This is defined as the objective code
* point (OCP) of the OF, RPL_OCP_OF0 or RPL_OCP_MRHOF. This flag is of
* no relevance to non-root nodes, which run the OF advertised in the
* instance they join.
* Make sure the selected of is inRPL_SUPPORTED_OFS.
*/
#ifdef RPL_CONF_OF_OCP
#define RPL_OF_OCP RPL_CONF_OF_OCP
#else /* RPL_CONF_OF_OCP */
#define RPL_OF_OCP RPL_OCP_MRHOF
#endif /* RPL_CONF_OF_OCP */
/*
* The set of objective functions supported at runtime. Nodes are only
* able to join instances that advertise an OF in this set. To include
* both OF0 and MRHOF, use {&rpl_of0, &rpl_mrhof}.
*/
#ifdef RPL_CONF_SUPPORTED_OFS
#define RPL_SUPPORTED_OFS RPL_CONF_SUPPORTED_OFS
#else /* RPL_CONF_SUPPORTED_OFS */
#define RPL_SUPPORTED_OFS {&rpl_mrhof}
#endif /* RPL_CONF_SUPPORTED_OFS */
/*
* Enable/disable RPL Metric Containers (MC). The actual MC in use
* for a given DODAG is decided at runtime, when joining. Note that
* OF0 (RFC6552) operates without MC, and so does MRHOF (RFC6719) when
* used with ETX as a metric (the rank is the metric). We disable MC
* by default, but note it must be enabled to support joining a DODAG
* that requires MC (e.g., MRHOF with a metric other than ETX).
*/
#ifdef RPL_CONF_WITH_MC
#define RPL_WITH_MC RPL_CONF_WITH_MC
#else /* RPL_CONF_WITH_MC */
#define RPL_WITH_MC 0
#endif /* RPL_CONF_WITH_MC */2) Contiki为节点的长期运行提供无线电占空比(RDC)机制。默认值为nullrdc,其中节点始终保持打开状态,因此生命周期较短。设置ContikiMAC以最小化节点功率。转到contiki/core/contiki-default-conf.h并根据您的需求进行编辑。
例如:
#ifndef NETSTACK_CONF_RDC
/* #define NETSTACK_CONF_RDC nullrdc_driver */
#define NETSTACK_CONF_RDC contikimac_driver
#endif /* NETSTACK_CONF_RDC */3) Tx/Rx可以从Network visualizer本身设置。您可以右键单击任意节点并编辑tx/rx范围和成功率。您也可以在.csc (模拟)文件中对其进行编辑。
<radiomedium>
org.contikios.cooja.radiomediums.UDGM
<transmitting_range>100.0</transmitting_range>
<interference_range>120.0</interference_range>
<success_ratio_tx>0.9</success_ratio_tx>
<success_ratio_rx>0.9</success_ratio_rx>
</radiomedium>4)您需要计算各种性能指标。为此,你有自己的代码脚本文件(困难的部分)。或使用这些链接https://github.com/iloveyii/contiki_rpl/tree/master/perl
https://pdfs.semanticscholar.org/d319/4d5f43f1cd3995ba7c9e99776ac8f150d445.pdf
5)使用移动性插件模拟各种移动性模型。
https://anrg.usc.edu/contiki/index.php/Mobility_of_Nodes_in_Cooja
http://vrajesh2188.blogspot.com/2016/04/mobility-in-contiki-2.html
https://stackoverflow.com/questions/56045118
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