On the Broadcast Capacity of Multihop Wireless Networks: Interplay of Power, Density and Interference
On the Broadcast Capacity of Multihop Wireless Networks: Interplay of Power, Density and Interference
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DOI：
10.1109/sahcn.2007.4292843
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发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
A. Keshavarz-Haddad;R. Riedi
中科院分区：
文献类型：
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作者：
A. Keshavarz-Haddad;R. Riedi
在无线网络中，我们将其定义为网络中可以生成广播数据包的最大速率，以便所有节点在给定时间内成功接收数据包。为了评估拓扑和干扰对广播容量的影响，我们采用了信道的物理模型和广义物理模型。之前的工作要么受到密度限制，要么受到使用不太现实但易于管理的协议模型的限制 [1]、[2]。在物理模型下，我们发现对于各种网络拓扑，广播容量都在信道容量的恒定因子内。另一方面，在广义物理模型下，网络配置被分为三种状态，具体取决于如何根据网络密度和规模调整功率，并且广播容量渐近为零、恒定或无界。正如我们所展示的，广播容量在第一个机制中受到远程节点的限制，在第二个机制中受到干扰的限制。在覆盖多种网络的第二种机制中，广播容量在带宽的恒定因子内。
In wireless networks which we define as the maximum rate at which broadcast packets can be generated in the network such that all nodes receive the packets successfully within a given time. To assess the impact of topology and interference on the broadcast capacity we employ the Physical Model and Generalized Physical Model for the channel. Prior work was limited either by density constraints or by using the less realistic but manageable Protocol model [1], [2]. Under the Physical Model, we find that the broadcast capacity is within a constant factor of the channel capacity for a wide class of network topologies. Under the Generalized Physical Model, on the other hand, the network configuration is divided into three regimes depending on how the power is tuned in relation to network density and size and in which the broadcast capacity is asymptotically either zero, constant or unbounded. As we show, the broadcast capacity is limited by distant nodes in the first regime and by interference in the second regime. In the second regime, which covers a wide class of networks, the broadcast capacity is within a constant factor of the bandwidth.