QoS-oriented channel assignment strategy for hierarchical cellular networks
QoS-oriented channel assignment strategy for hierarchical cellular networks
复制标题
分层蜂窝网络面向QoS的信道分配策略
DOI：
10.1109/pimrc.2000.881688
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
V. Vèque
中科院分区：
文献类型：
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作者：
Fabrice Valois;V. Vèque
在第三代无线蜂窝通信系统中，为了适应高用户密度和多媒体业务，小区尺寸预计将变得更小。在使用分层蜂窝网络的这种系统中，微小区可以与宏小区共存。资源分配方案必须是动态和灵活的，以处理用户移动性和业务变化。在本文中，我们提出了一种新的分配策略来管理这样一个网络中的快用户和慢用户的资源请求。我们的贡献使用了一种基于抢占的增强机制，这可以被视为一种使用通道重新分配的可逆按需策略。该工作的创新之处在于考虑了向移动用户提供的用于执行资源分配的服务质量标准的当前值。对新方案进行了仿真，并从新呼叫阻塞和丢弃切换概率以及信令负载等方面对性能进行了分析。结果表明，与其他信令增加较小的方案相比，所提出的资源管理策略显著降低了呼叫阻塞和掉话的概率。
In the third generation of wireless cellular communication systems, cell sizes are expected to become smaller in order to accommodate high user density and multimedia traffic. In such a system, where hierarchical cellular networks are used, microcells may coexist with macrocells. Resource allocation schemes will have to be dynamic and flexible to handle user mobility and traffic variation. In this paper, we propose a new allocation strategy to manage both fast and slow users resources request in such a network. Our contribution uses an enhanced mechanism based on preemption which can be viewed as a reversible strategy on-demand using channel re-allocation. The originality of this work is to take into account the current value of QoS criteria provided to mobile users to perform resource allocation. Our new scheme is simulated and performance is analyzed in terms of new call blocking and dropping handover probabilities and signalling load. Results show that proposed resource management policy reduces significantly call blocking and dropping probabilities compared to other proposals with lower signalling increase.