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首页> 外文期刊>American journal of applied sciences >AN INTELLIGENT VERTICAL HANDOVER DECISION ALGORITHM FOR WIRELESS HETEROGENEOUS NETWORKS
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AN INTELLIGENT VERTICAL HANDOVER DECISION ALGORITHM FOR WIRELESS HETEROGENEOUS NETWORKS

机译：无线异构网络的智能垂直切换决策算法

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摘要

The Next Generation Wireless Networks (NGWN) should be compatible with other communication technologies to offer the best connectivity to the mobile terminal which can access any IP based services at any time from any network without the knowledge of its user. It requires an intelligent vertical handover decision making algorithm to migrate between technologies that enable seamless mobility, always best connection and minimal terminal power consumption. Currently existing decision engines are simple, proprietary and its handover is only based on the received signal strength which has been proven unintelligent. The proposed decision algorithm gains intelligence by combining fuzzy logic system to handle imprecise data, multiple attribute decision making to handle multiple attributes for decision making and context aware strategies to reduce unnecessary handover. The proposed intelligent decision algorithm detects new network which offers best connectivity than current network and does authentication and mobile IP registration before making the handover; thereby reducing the packet loss to ensure high quality of service. This algorithm is capable of forwarding data packets to appropriate attachment point to maximize battery lifetime and also to maintain load balancing. The performance analysis shows that the proposed algorithm efficiently uses the network resources by switching between 3G and Wi-Fi under the different RF environmental conditions to offer best connectivity with minimal service cost to the users. It is observed that average handover delay for the experiment is 30-40ms and the integration of cellular network with WLAN using the proposed intelligent decision algorithm reduces the call dropping rate (＜0.006) and call blocking probability (＜0.00607) as well as unnecessary handover in heterogeneous networks.
机译：下一代无线网络（NGWN）应该与其他通信技术兼容，以提供与移动终端的最佳连接性，该移动终端可以在任何时间从任何网络访问任何基于IP的服务，而无需用户的了解。它需要一种智能的垂直切换决策算法来在支持无缝移动性，始终保持最佳连接和最小终端功耗的技术之间迁移。当前，现有的决策引擎是简单，专有的，其切换仅基于已被证明不智能的接收信号强度。所提出的决策算法通过结合模糊逻辑系统处理不精确数据，多属性决策处理多个属性以进行决策以及上下文感知策略来减少不必要的切换，从而获得智能。提出的智能决策算法可以检测到比当前网络提供最佳连通性的新网络，并在进行切换之前进行身份验证和移动IP注册。从而减少丢包，确保高质量的服务。该算法能够将数据包转发到适当的连接点，以最大化电池寿命并保持负载平衡。性能分析表明，所提出的算法通过在不同的RF环境条件下在3G和Wi-Fi之间进行切换来有效地利用网络资源，从而以最小的服务成本为用户提供最佳的连接性。可以观察到，该实验的平均切换延迟为30-40ms，并且使用建议的智能决策算法将蜂窝网络与WLAN集成，可以降低掉话率（＜0.006）和呼叫阻塞概率（＜0.00607）以及不必要的切换在异构网络中。

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