最大传输范围与最大干扰距离 [英] Maximum transmission range vs maximum interference distance

问题描述

我想知道在Omnet ++(静脉框架)下理论上的最大传输范围是否与最大干扰距离相同.

我想确认其他人之前所做的一些计算，最后一个结论是传输范围等于:

• 127m for Txpower = -80dbm&灵敏度= 10mW
Tlipower的
• 300m = -80dbm&灵敏度= 15.5mW
• Tmpower的-1000m = -94dbm&灵敏度= 20mW

对于所有计算:路径损耗系数α= 2&频率= 5890Mhz

在我这边，我分别得到127m，159m和907m.我不知道为什么会有很大的不同.我使用自由空间路径损耗公式.

有人可以向我确认这些结果吗?

解决方案

您是正确的:如果帧在Veins 3中的接收功率在灵敏度阈值以下，则该数据包将永远无法解码(与接收到的SINR无关). /p>

静脉3中使用的自由空间路径损耗公式为:

对于20 mW的发射功率和-94 dBm的灵敏度阈值(我假设这只是您的输入错误)，接收功率下降到灵敏度阈值以下的距离

I am wondering if the theoretical maximum transmission range under Omnet++ (veins framework) is the same as the maximum interference distance.

I want to confirm some calculations done before by another person, Last one concludes that the transmission range is equal to :

• 127m for Txpower = -80dbm & sensitivity = 10mW
• 300m for Txpower = -80dbm & sensitivity = 15.5mW
• 1000m for Txpower = -94dbm & sensitivity = 20mW

For all calculations: path loss coeffcient alpha = 2 & frequency = 5890Mhz

On my side, I get respectively 127m, 159m and 907m. I am not able to know why to much difference. I use the free space path loss formula.

Can someone confirm to me these result ?

解决方案

You are correct: if a frame's receive power in Veins 3 is under the sensitivity threshold, the packet can never be decoded (independent of its received SINR).

The free space path loss formula used in Veins 3 is:

For a transmit power of 20 mW and a sensitivity threshold of -94 dBm (I am assuming that this is just a typo in your question), the distance where the received power drops under the sensitivity threshold can be calculated to be (roughly) 907 meters.

Since you specifically asked for the maximum interference range, though, please note that the transmit power can be selected for each frame and the sensitivity threshold can be configured for each radio. They are therefore not used for calculating the maximum interference range (the distance where a sender is deemed so far away that it will not even contribute interference). This distance is calculated independently by the global ConnectionManager module, whose job it is to deliver "ongoing radio transmission" events to all affected modules. It uses a completely separate (global) set of parameters to calculate this range.

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