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arXiv 0812.1405cs.ITmath.IT
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基础设施与Ad-hoc系统的认知共存

Cognitive Coexistence between Infrastructure and Ad-hoc Systems

Stefan Geirhofer, Lang Tong, Brian M. Sadler

摘要:

无线系统的快速增长使得干扰管理变得越来越重要。本文提出了一种新的认知共存框架,它使基础设施系统,以减少干扰ad-hoc或点对点通信链路的紧密接近。出于优越的资源的基础设施系统,我们研究如何集中资源分配可以容纳的ad-hoc链路的基础上感知和预测他们的干扰模式。基于ON/OFF连续时间马尔可夫链模型,将功率和传输时间的最优分配问题转化为凸优化问题,并给出了封闭形式的解。最优调度的情况下,基础设施的信道是随机的,速率约束只需要满足长期平均。最后讨论了多终端情况下的最优子信道分配问题。数值性能分析表明,利用基础设施链路的优越灵活性,可以有效地减轻干扰。

英文摘要:

The rapid proliferation of wireless systems makes interference management more and more important. This paper presents a novel cognitive coexistence framework, which enables an infrastructure system to reduce interference to ad-hoc or peer-to-peer communication links in close proximity. Motivated by the superior resources of the infrastructure system, we study how its centralized resource allocation can accommodate the ad-hoc links based on sensing and predicting their interference patterns. Based on an ON/OFF continuous-time Markov chain model, the optimal allocation of power and transmission time is formulated as a convex optimization problem and closed-form solutions are derived. The optimal scheduling is extended to the case where the infrastructure channel is random and rate constraints need only be met in the long-term average. Finally, the multi-terminal case is addressed and the problem of optimal sub-channel allocation discussed. Numerical performance analysis illustrates that utilizing the superior flexibility of the infrastructure links can effectively mitigate interference.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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