Optimized Gateway Placement for Interference Cancellation in Transmit-Only LPWA Networks.

Optimized Gateway Placement for Interference Cancellation in Transmit-Only LPWA Networks.
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优化网关布局以消除仅传输 LPWA 网络中的干扰

DOI:
10.3390/s18113884
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发表时间:
2018-11-11
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Nyengele G
Nyengele G
中科院分区:
其他
文献类型:
--
作者:
Tian H;Weitnauer MA;Nyengele G

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我们研究了在低功耗广域传感器网络中,当网关进行干扰消除以及干扰消除的剩余误差模型与被消除的数据包的功率成正比时网关的位置。对于发送碰撞数据包的两个传感器节点,我们的意思是在时间上重叠,我们推导了一个对称的双新月区域,其中网关可以解码两个碰撞数据包。对于由多个传感器和多个网关组成的大型网络,我们提出了两种贪婪算法来优化网关的位置。仿真结果表明,对于多个传感器的区域分布,采用该算法的网关位置比单纯放置网关时具有更低的平均争用,这意味着在相同条件下具有更高的分组分发率。
We study the placement of gateways in a low-power wide-area sensor network, when the gateways perform interference cancellation and when the model of the residual error of interference cancellation is proportional to the power of the packet being canceled. For the case of two sensor nodes sending packets that collide, by which we mean overlap in time, we deduce a symmetric two-crescent region wherein a gateway can decode both collided packets. For a large network of many sensors and multiple gateways, we propose two greedy algorithms to optimize the locations of the gateways. Simulation results show that the gateway placements by our algorithms achieve lower average contention, which means higher packet delivery ratio in the same conditions, than when gateways are naively placed, for several area distributions of sensors.
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