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首页> 外文会议>Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on >An architecture for providing range extension by deploying mobile gateways in ad hoc networks
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An architecture for providing range extension by deploying mobile gateways in ad hoc networks

机译：通过在ad hoc网络中部署移动网关来提供范围扩展的体系结构

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The dynamic nature of a mobile ad hoc network (MANET) may result in a cluster of nodes being isolated from the rest of the network, especially when deployed in a terrain with blockages. To provide connectivity between the partitions of an ad hoc network that might occur due to mobility, a 'range extension' network can be employed. Such a network might consist of airborne communication platforms, or geostationary/low-Earth-orbit satellites maintaining communication links with specific 'gateway' nodes that are dispersed among the mobile ground nodes. Thus, to communicate with a node that is geographically distant or belongs to a different network partition, an ad hoc node can relay its data packets through an appropriate mobile gateway and via the range extension network. In such an architecture, MANET is divided into different domains with a mobile gateway deployed for each domain. The objective, then, is to determine the position and trajectory of the gateways to optimize network performance metrics such as throughput and latency. In this paper, computation of the optimal position for a gateway is shown to be equivalent to a linear optimization problem by means of some simplifying but realistic assumptions. An algorithm is proposed for the control of the gateway trajectory. The practical constraints imposed by the velocity and maneuverability of the gateways are taken into account. Simulation results show a 10-15% improvement in the throughput and latency, per gateway domain, if a gateway has a dynamic trajectory whose locus follows the computed optimal position, as compared to a gateway that is statically placed at a fixed position, or to a gateway that has a random trajectory.
机译：移动自组织网络（MANET）的动态性质可能导致节点群集与网络的其余部分隔离开，尤其是当部署在有障碍物的地形中时。为了提供可能由于移动性而发生的自组织网络的分区之间的连接性，可以采用“范围扩展”网络。这样的网络可能由机载通信平台或对地静止/低地球轨道卫星组成，这些卫星与分散在移动地面节点之间的特定“网关”节点保持通信链路。因此，为了与地理上相距遥远或属于不同网络分区的节点进行通信，自组织节点可以通过适当的移动网关和范围扩展网络中继其数据包。在这样的体系结构中，MANET被划分为不同的域，并为每个域部署了移动网关。然后，目标是确定网关的位置和轨迹，以优化网络性能指标，例如吞吐量和延迟。在本文中，通过一些简化但现实的假设，计算出网关的最佳位置等效于线性优化问题。提出了一种控制网关轨迹的算法。考虑到网关的速度和可操作性带来的实际限制。仿真结果表明，与静态放置在固定位置的网关相比，如果网关具有动态轨迹的轨迹（在轨迹上遵循计算出的最佳位置），则每个网关域的吞吐量和延迟都会提高10-15％。具有随机轨迹的网关。

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