一种基于协作分集技术的切换机制
doi: 10.3724/SP.J.1146.2010.00818
A Handover Mechanism Based on Cooperative Diversity
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摘要: 现有切换管理机制主要采用基于提前切换准备的方法来降低切换过程中的服务中断时间，但是这类切换机制对移动预测算法具有很高的依赖性，因而实际部署的效果不佳。为解决该问题，该文提出了基于协作分集技术的切换机制，通过在切换过程中引入异构协作分集，延长了切换过程中源基站能够为移动终端提供服务的时间，降低对移动预测算法的依赖，从而很好地解决了现有移动管理机制的不足。Abstract: Current HandOver (HO) mechanism usually cuts down the duration of service interruption by pre- executing some preparation operations before HO execution. But this technique is much dependant on mobility trace prediction algorithm, which is very difficult in actual environment. To resolve this problem, a novel HO mechanism based on Cooperative Diversity (CDHO) is proposed. CDHO introduces cooperative diversity between Mobile Node (MN) and source Base Station (BS) to extend the service duration in which source BS can satisfy MNs QoS requirement. In this extended duration, MN has much more time to finish HO preparation, thus CDHO reduces dependence on mobility trace prediction algorithm.
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